JP6034096B2

JP6034096B2 - Chair support structure

Info

Publication number: JP6034096B2
Application number: JP2012186656A
Authority: JP
Inventors: 博浅野
Original assignee: Aichi Corp
Current assignee: Aichi Corp
Priority date: 2012-08-27
Filing date: 2012-08-27
Publication date: 2016-11-30
Anticipated expiration: 2032-08-27
Also published as: JP2014042652A

Description

本発明は、座や背凭れ等の支承体を、椅子本体の支持枠に取り付ける椅子の支承体取付構造に関し、さらに詳しくは、支承体に合成樹脂等の弾性部材で形成される座板や背板を有する椅子の支承体取付構造に関する。 The present invention relates to a chair support structure for attaching a support body such as a seat or a backrest to a support frame of a chair body, and more specifically, a seat plate or back formed by an elastic member such as a synthetic resin on the support body. The present invention relates to a mounting structure for a chair having a board.

座や背凭れ等の支承体を椅子本体の支持枠に取り付ける場合、支持枠に支承体を宛がい、座や背凭れに設けられる座板や背板を、支持枠に穿設した取付孔を介してねじ等で螺着して取り付けるのが一般的である。 When attaching a support body such as a seat or a backrest to the support frame of the chair body, attach the support body to the support frame, and make a mounting hole drilled in the support frame with a seat plate or back plate provided on the seat or backrest Generally, it is attached by screwing with a screw or the like.

この場合、座り心地を良くするため、座板や背板が柔軟性のある合成樹脂等の弾性部材で形成されていると、着座して支承体の中心付近に体重の相当部分が印加されたとき、座板や背板が支持枠に対して撓曲変形し、ねじ等で螺着した支持枠と支承体との締結部分に応力が集中して、この締結部分が破損してしまう虞がある。 In this case, in order to improve the sitting comfort, if the seat plate and the back plate are formed of an elastic member such as a flexible synthetic resin, a corresponding portion of the body weight is applied near the center of the support body. When the seat plate or the back plate is flexibly deformed with respect to the support frame, there is a risk that stress is concentrated on the fastening portion between the support frame and the support body screwed with screws or the like, and the fastening portion is damaged. is there.

そこで、このような問題点を解決するため、特許文献１に示す技術が提案されている。この特許文献１の技術は、背板には、背板の左右上部に大径孔とこれに続いて上方に連設した小径長孔とからなる係合孔と、背板の左右下部に円弧状の膨出部と該膨出部の直下に穿設された嵌合孔とが設けられ、一方支持枠には、支持枠の左右上部に係合突起と、支持枠の左右下部に上向きに開口する嵌合溝を有する包持片とが設けられている。 Therefore, in order to solve such problems, a technique shown in Patent Document 1 has been proposed. The technique of this patent document 1 is that the back plate has a large-diameter hole in the left and right upper part of the back plate and a small-diameter long hole continuously provided on the upper side, and circular holes in the left and right lower part of the back plate. An arcuate bulge and a fitting hole drilled directly below the bulge are provided. On the other hand, the support frame has an engagement protrusion on the left and right upper part of the support frame and an upward on the left and right lower part of the support frame. A holding piece having a fitting groove that opens is provided.

そして、背板の大径孔に支持枠の係合突起を挿入すると共に、背板の嵌合孔を支持枠の包持片に引っ掛け、次いで背板を押し下げて、背板の小径長孔に支持枠の係合突起を挿入すると共に、背板の膨出部を支持枠の嵌合溝に圧嵌し、これにより背凭れ（支承体）を椅子本体の支持枠に取り付けるようになっている。 Then, the engaging projections of the support frame are inserted into the large-diameter hole of the back plate, the fitting hole of the back plate is hooked on the holding piece of the support frame, and then the back plate is pushed down to the small-diameter long hole of the back plate While inserting the engagement protrusion of the support frame, press-fitting the bulging portion of the back plate into the fitting groove of the support frame, thereby attaching the backrest (support body) to the support frame of the chair body. .

特開２００１−１２８７８５号公報JP 2001-128785 A

しかしながら、特許文献１の技術は、上述したように支承体の支持枠への取り付け方法が煩雑な作業となり、また、着座して支承体が支持枠に対して撓曲変形すると、包持片に嵌合された膨出部が回動することにより、係合突起は、小径長孔内で上下方向に移動するものの、包持片が嵌合孔に左右方向に係止されているので小径長孔内で左右方向の移動ができず、従って、支承体は上下方向に移動できても左右方向に移動できない構成となっている。 However, in the technique of Patent Document 1, as described above, the method of attaching the support body to the support frame becomes a complicated operation, and when the support body is bent and deformed with respect to the support frame, By rotating the fitted bulging part, the engaging protrusion moves up and down in the small diameter long hole, but the holding piece is locked in the left and right direction in the fitting hole, so that the small diameter long Therefore, the support body cannot move in the left-right direction even if it can move in the up-down direction.

即ち、特許文献１の技術は、着座して支承体が支持枠に対して撓曲変形したとき、支承体は上下方向の一方向にしか移動できないので、このような構成の特許文献１の技術では、支持枠と支承体との締結部分が破損してしまうことを防止するには不十分であると共に、支承体の弾性変形による柔軟性を十分に発揮できずに座り心地が低下してしまうという問題点がある。 That is, in the technique of Patent Document 1, since the support body can move only in one direction in the vertical direction when the support body is bent and deformed with respect to the support frame, the technique of Patent Document 1 having such a configuration is employed. However, it is not sufficient to prevent the fastening portion between the support frame and the support body from being damaged, and the seating comfort is deteriorated because the flexibility due to the elastic deformation of the support body cannot be fully exhibited. There is a problem.

本発明は、上記したような問題点に鑑みなされたもので、その目的とするところは、椅子本体の支持枠への支承体の取り付け作業が容易で、しかも支承体を支持枠に取り付けた状態では、合成樹脂等の弾性部材で形成される支承体の柔軟性を損なわず、且つ荷重による支承体の変形に伴う支持枠と支承体との締結部分の負担を軽減することができる椅子の支承体取付構造を提供することにある。 The present invention has been made in view of the above-described problems, and the object of the present invention is to easily attach the support body to the support frame of the chair body and to attach the support body to the support frame. Then, the chair support which can reduce the burden of the fastening portion between the support frame and the support body due to the deformation of the support body due to the load without impairing the flexibility of the support body formed of an elastic member such as synthetic resin. The object is to provide a body mounting structure.

このような問題を解決するために、本発明の椅子の支承体取付構造は、合成樹脂等の弾性部材で形成される座板や背板等の支承体（座板１２）を、椅子本体の支持枠（座枠１３）に取り付ける椅子（椅子１）の支承体取付構造であって、前記支承体は、全体が略矩形の板状に形成され、その一辺側を締結手段（タッピングネジ２４）により前記支持枠に固着保持し、残りの三辺側を、該支承体の裏面側から突出する略Ｌ字形の外方向に開口された係止部材（係止片１２ａ、ｂ）で前記支持枠の係合部材（係合突片２０ａ、折返片２１ａ）を挟持するように保持することで、前記支承体を前記支持枠に取り付けることを要旨とする。 In order to solve such a problem, the chair support body mounting structure of the present invention has a seat body or a back board or other support body (seat plate 12) formed of an elastic member such as a synthetic resin. A support body mounting structure for a chair (chair 1) to be mounted on a support frame (seat frame 13), the support body being formed in a substantially rectangular plate shape as a whole, and fastening means (tapping screw 24) on one side thereof The supporting frame is fixedly held by the supporting frame, and the remaining three sides are fixed to the supporting frame by locking members (locking pieces 12a and 12b) that are open from the rear surface side of the support body and have a substantially L-shaped outward direction. The gist is to attach the support body to the support frame by holding the engagement members (engagement protrusions 20a, folded pieces 21a).

従って、このように構成される本発明においては、使用者が椅子に着座して支承体がその中心方向に引っ張られるように撓曲変形しても、係止部材は下（座板の場合）又は後（背板の場合）方向且つ支承体の中心方向（辺と直交する方向及び辺に沿った方向）に支承体が支持枠から外れない程度に移動して柔軟に保持されるので、その結果、支承体と支持枠との締結部分に応力が集中して、この締結部分が破損してしまうことを防止することができると共に、支承体の弾性変形による柔軟性を十分に発揮でき、使用者は快適な着座感を得ることができるという極めて顕著な効果を奏する。 Therefore, in this invention comprised in this way, even if a user seats on a chair and bends and deform | transforms so that a support body may be pulled in the center direction, a locking member is the bottom (in the case of a seat board). Alternatively, since the support body moves to the rear (in the case of the back plate) and the center direction of the support body (the direction orthogonal to the side and the direction along the side) so as not to be detached from the support frame, it is held flexibly. As a result, it is possible to prevent stress from concentrating on the fastening part between the support body and the support frame and to damage this fastening part, and to fully exhibit the flexibility due to the elastic deformation of the support body. The person can obtain a very significant effect that a comfortable seating feeling can be obtained.

また、上述した椅子の支承体取付構造において、前記係止部材と対向する前記支承体の表面には、切欠部（切欠部１６ａ、ｂ）が穿設されていてもよい。従って、このように構成される本発明においては、支承体に荷重が印加されたときの係止部材の移動が容易となり、つまり切欠部は、係止部材の移動をスムースにして支承体の弾性変形を補助する機能を有している。その結果、支承体の弾性変形による柔軟性をさらに発揮でき、使用者の着座感をさらに向上させることができる。 Further, the scaffold attachment structure of the chair described above, the surface of the scaffold that faces the locking member, the cutout portion (cutout portion 16a, b) may be bored. Therefore, in the present invention configured as described above, the locking member can be easily moved when a load is applied to the support body. In other words, the notch portion makes the movement of the locking member smooth and the elasticity of the support body. It has a function to assist deformation. As a result, the flexibility due to the elastic deformation of the support body can be further exhibited, and the seating feeling of the user can be further improved.

また、上述した椅子の支承体取付構造において、前記支承体は、一方向にスライドさせることにより前記係止部材の少なくとも１つが前記係合部材に当接し、これにより前記支承体の前記支持枠に対する取付位置が規定されていてもよい。 Moreover, in the above-described chair support body mounting structure, the support body is slid in one direction so that at least one of the locking members abuts on the engagement member, whereby the support body is attached to the support frame. mounting position may be defined.

つまり、本発明においては、係止部材の少なくとも１つは、支承体を支持枠に取り付けるときの位置決め手段としての機能も兼ね備えている。従って、このように構成される本発明においては、支持枠への支承体の取り付け作業が極めて容易となり、一方向にスライドさせるだけのワンタッチで支承体を支持枠に取り付けることが可能になる。 That is, in the present invention, at least one of the locking members also has a function as positioning means when the support body is attached to the support frame. Therefore, in the present invention configured as described above, it is very easy to attach the support body to the support frame, and it is possible to attach the support body to the support frame with one touch only by sliding in one direction.

また、さらに支持枠への支承体の取り付け作業を容易にするには次のようにするとよい。即ち、上述した椅子の支承体取付構造において、前記係合部材は、略矩形の平板状に形成され、前記係止部材と係合する側がテーパー状に形成されていていてもよい。従って、このように構成される本発明においては、係止部材が係合部材を挟持し易くなり、さらに支持枠への支承体の取り付け作業が容易となる。 Further, in order to further facilitate the attachment work of the support body to the support frame, it is preferable to do the following. That is, in the above-described chair support mounting structure, the engaging member may be formed in a substantially rectangular flat plate shape, and a side engaging with the locking member may be formed in a tapered shape. Therefore, in this invention comprised in this way, a locking member becomes easy to clamp an engaging member, and also the attachment operation | work of the support body to a support frame becomes easy.

また、上述した椅子の支承体取付構造において、前記椅子は座跳ね上げ式の椅子とし、前記支承体は前記座板とし、前記三辺側のうちの何れか一辺側の前記係合部材は、該座跳ね上げ式の椅子の前記支持枠を構成する横幅方向に延在する略コの字形の横座枠（後座枠２１）の内向きに突出する折返片（折返片２１ａ）としてもよい。横座枠は、椅子が座跳ね上げ式の場合には一般的にコの字形に形成されるので、従って、このように構成される本発明においては、係止部材は、他の構成が異なるどのような種類の座跳ね上げ式の椅子にもそのまま対応することができ、極めて使い勝手がよくなり、好適となる。 Moreover, in the above-described chair support body mounting structure, the chair is a flip-up chair, the support body is the seat plate, and the engagement member on any one side of the three sides is: it may be a folding Kaehen (Orikaehen 21a) projecting inwardly of the seat flip-up the support frame to extend in the lateral width direction that constitutes approximately C-shaped in lateral frame chair (rear seat frame 21) . The side seat frame is generally formed in a U shape when the chair is a flip-up type chair. Therefore, in the present invention configured as described above, the locking member may be any other configuration. This type of chair can be used as it is, and it is very convenient and suitable.

本実施形態に係わる椅子１の全体斜視図である。It is a whole perspective view of the chair 1 concerning this embodiment. 本実施形態に係わる椅子１の分解斜視図である。It is a disassembled perspective view of the chair 1 concerning this embodiment. 本実施形態に係わる座１０単体の四面図である。It is a four-plane figure of the seat 10 simple substance concerning this embodiment. 本実施形態に係わる座１０を構成する座板１２とクッション１１が組み付けられた状態の三面図である。It is a three-view figure of the state in which the seat board 12 and the cushion 11 which comprise the seat 10 concerning this embodiment were assembled | attached. 本実施形態に係わる座板１２単体の四面図である。It is a four-plane figure of the seat board 12 concerning this embodiment. 本実施形態に係わる座１０を構成する座枠１３単体の三面図である。It is a three-view figure of the seat frame 13 single-piece | unit which comprises the seat 10 concerning this embodiment. 本実施形態に係わる座板１２と座枠１３の分解斜視図である。It is a disassembled perspective view of the seat plate 12 and the seat frame 13 concerning this embodiment. 本実施形態に係わる座支持軸３３にブッシュ４２及びストッパ４５ａ、ｂを取り付ける状態を示す説明図である。It is explanatory drawing which shows the state which attaches the bush 42 and stopper 45a, b to the seat support shaft 33 concerning this embodiment. 本実施形態に係わる座板１２を座枠１３に取り付けるときの状態を示す斜視図である。It is a perspective view which shows a state when attaching the seat board 12 concerning this embodiment to the seat frame 13. FIG. 本実施形態に係わる図３（Ａ）の左側の係止片１２ａ付近の拡大Ｃ−Ｃ断面図及び図３（Ａ）の係止片１２ｂ付近の拡大Ｄ−Ｄ断面図である。FIG. 4 is an enlarged CC sectional view in the vicinity of the left locking piece 12a in FIG. 3A and an enlarged DD sectional view in the vicinity of the locking piece 12b in FIG.

１．椅子１の構成
以下に、本発明を実施するための形態を図と共に説明する。まず、図１を参照しながら、椅子１の全体構成について説明する。図１は、椅子１の全体斜視図である。本実施形態の椅子１は、大別すると、使用者が着席する座１０と、背凭れ３と、座１０及び背凭れ３を支持する側部材５とから成っている。 1. Configuration of Chair 1 A mode for carrying out the present invention will be described below with reference to the drawings. First, the overall configuration of the chair 1 will be described with reference to FIG. FIG. 1 is an overall perspective view of the chair 1. The chair 1 of this embodiment is roughly divided into a seat 10 on which a user is seated, a backrest 3, and a side member 5 that supports the seat 10 and the backrest 3.

椅子１は、図１に示すように、座１０の後方側が左右の側部材５に回動可能に支持され、椅子１に着席していないときには、座１０を水平状態から自動起立（図１の左の椅子１の状態から右の椅子１の状態に移行）させ、椅子１の前後の間隔を広げることが可能な座跳ね上げ式椅子となっている。また、側部材５は、その固着部６が床や地面にアンカーボルト等で固着され、その上部は肘掛部７となっている。なお、椅子１同士の間に設けられる側部材５は、椅子１両者兼用の側部材５として使用されるようになっている。また、図１では、椅子１は２脚例示したが、この数は限定されるものではない。 As shown in FIG. 1, the chair 1 is supported by the left and right side members 5 so that the rear side of the seat 10 is pivotable, and when the chair 1 is not seated on the chair 1, the seat 10 is automatically raised from a horizontal state (see FIG. 1). The chair 1 is a flip-up chair that can be moved from the state of the left chair 1 to the state of the right chair 1 and the distance between the front and back of the chair 1 can be increased. The side member 5 has a fixed portion 6 fixed to the floor or the ground with an anchor bolt or the like, and an upper portion of the side member 5 is an armrest portion 7. In addition, the side member 5 provided between the chairs 1 is used as the side member 5 for both the chairs 1. In FIG. 1, two chairs 1 are illustrated, but this number is not limited.

次に、本実施形態の要部となる座１０の構成について説明する。図２は、椅子１の分解斜視図である。なお、本図において、座１０を構成するクッション１１、右側の側部材５及び背凭れ３は図示を省略している。また、図３は、座１０単体の四面図、図４は、座１０を構成する座板１２とクッション１１が組み付けられた状態の三面図、図５は、座板１２単体の四面図、図６は、座１０を構成する座枠１３単体の三面図、図７は、座板１２と座枠１３の分解斜視図を示している。 Next, the configuration of the seat 10 that is a main part of the present embodiment will be described. FIG. 2 is an exploded perspective view of the chair 1. In the drawing, the cushion 11, the right side member 5 and the backrest 3 constituting the seat 10 are not shown. 3 is a four-view diagram of the seat 10 alone, FIG. 4 is a three-view diagram of the seat plate 12 and the cushion 11 constituting the seat 10, and FIG. 5 is a four-view diagram of the seat plate 12 alone. 6 is a three-sided view of the seat frame 13 constituting the seat 10, and FIG. 7 is an exploded perspective view of the seat plate 12 and the seat frame 13.

座１０は、クッション１１と、図２に示す座板１２、座枠１３、裏カバー３０とを組み立てることにより構成されるもので、まず、クッション１１の裏面側に組み付けられる座板１２について説明する。座板１２は、合成樹脂等の弾性部材で全体が略矩形状に形成され、図４に示すように、クッション１１の裏面側に該クッション１１を支持するように取り付けられている。 The seat 10 is configured by assembling the cushion 11, the seat plate 12, the seat frame 13, and the back cover 30 shown in FIG. 2. First, the seat plate 12 assembled on the back side of the cushion 11 will be described. . The entire seat plate 12 is formed of an elastic member such as synthetic resin in a substantially rectangular shape, and is attached to the back surface side of the cushion 11 so as to support the cushion 11 as shown in FIG.

図に示すように、座板１２は、多数の同心円を形成するように円弧状に穿設された複数の溝１４が左右対称状に設けられており、その前端にはクッション１１の前垂れ部１１ａ（図３参照）を支持する下向きの突起板１５が突設されている。なお、図５においては、（Ａ）は、座板１２を表面側から、（Ｂ）は、座板１２を裏面側から、（Ｃ）は、（Ｂ）の右側から、（Ｄ）は、（Ｂ）の後側からそれぞれ見た場合を示し、また、図５（Ａ）〜（Ｃ）では、紙面上方が前、下方が後となる。なお、図４（Ａ）〜（Ｃ）は、図５（Ｂ）〜（Ｄ）に準ずる。 As shown in the drawing, the seat plate 12 is provided with a plurality of grooves 14 that are formed in an arc shape so as to form a large number of concentric circles, and is provided symmetrically on the front end. A downward projecting plate 15 that supports (see FIG. 3) is provided in a projecting manner. In FIG. 5, (A) shows the seat plate 12 from the front side, (B) shows the seat plate 12 from the back side, (C) shows from the right side of (B), and (D) shows (B) The case where it sees from the back side is each shown, Moreover, in FIG. 5 (A)-(C), the upper surface of a paper becomes front and the downward direction becomes back. 4A to 4C conform to FIGS. 5B to 5D.

ここで、座板１２の裏面側には、下方に突出する略Ｌ字状の外方向に開口された４つの係止片１２ａ、ｂが、図４、５に示すように、それぞれ左右対称状に配置されて設けられている。これら係止片１２ａ、ｂは、後述する座枠１３の係合突片２０ａ及び折返片２１ａに係止して座板１２を座枠１３に固定する機能を有するもので、係止片１２ａは、座板１２裏面の左右側の前後方向の略中央に一対設けられ、係止片１２ｂは、座板１２裏面の後側に並行状に一対設けられている。 Here, on the back side of the seat plate 12, there are four locking pieces 12a and 12b that are open in a substantially L shape and projecting downward, as shown in FIGS. It is arranged and provided. These locking pieces 12a, b have a function of locking the seat plate 12 to the seat frame 13 by locking to an engaging projection piece 20a and a folded piece 21a of the seat frame 13 described later. The pair of locking pieces 12b are provided in parallel on the rear side of the back surface of the seat plate 12 in a substantially central position in the front-rear direction on the left and right sides of the back surface of the seat plate 12.

また、座板１２には、図２、７に示すように、係止片１２ａ、ｂと対応する箇所に、略矩形状に切り欠かれた切欠部１６ａ、ｂが穿設されており、つまり係止片１２ａ、ｂは、切欠部１６ａ、ｂの４辺のうちの内側の辺から垂直状に立ち下がる矩形垂直片１８ａと、この矩形垂直片１８ａの下端から外方向に水平状に延在する矩形水平片１８ｂとでＬ字形に形成され、切欠部１６ａ、ｂは、この矩形水平片より一回り大きく形成されている（図４、５及び後述する図１０参照）。なお、図中、１７は、係止片１２ａ、ｂで座板１２を座枠１３に固定した後、タッピングネジ２４（図３、６参照）で座板１２と座枠１３とを締結するための取付孔である。この取付孔１７は、座板１２の前側の左右縁に、略々係止片１２ｂと対向するように穿設されている。 Further, as shown in FIGS. 2 and 7, the seat plate 12 is provided with notches 16a and 16b that are notched in a substantially rectangular shape at positions corresponding to the locking pieces 12a and 12b. The locking pieces 12a and 12b extend in a horizontal direction outward from the rectangular vertical piece 18a that vertically falls from the inner side of the four sides of the notches 16a and b, and from the lower end of the rectangular vertical piece 18a. The rectangular horizontal piece 18b is formed in an L shape, and the notches 16a and 16b are formed slightly larger than the rectangular horizontal piece (see FIGS. 4 and 5 and FIG. 10 described later). In the figure, reference numeral 17 is for fastening the seat plate 12 and the seat frame 13 with the tapping screws 24 (see FIGS. 3 and 6) after fixing the seat plate 12 to the seat frame 13 with the locking pieces 12a and 12b. This is a mounting hole. The mounting holes 17 are formed in the left and right edges on the front side of the seat plate 12 so as to substantially face the locking pieces 12b.

次に、座枠１３の構成について説明する。座枠１３は、図２に示すように、前後方向に延在する一対の側座枠２０と、この一対の側座枠２０を連結する左右方向（椅子１の横幅方向）に延在する前座枠２２及び後座枠２１とで、上下が大きく開口した方形状に形成されており（図６（Ａ）、７参照）、これら座枠１３を構成する側座枠２０、前座枠２２及び後座枠２１は、金属性の材料により形成されている。なお、図６においては、（Ａ）は、座枠１３を表面側から見た場合を示し、（Ｂ）は、（Ａ）のＡ−Ａ断面図、（Ｃ）は、（Ａ）のＢ−Ｂ断面図を示し、また、図６（Ａ）〜（Ｃ）では、紙面上方が前、下方が後となる。なお、図３（Ａ）〜（Ｃ）は、図６（Ａ）〜（Ｃ）に準じ、図３（Ｄ）は、図３（Ａ）の右側面図である。 Next, the configuration of the seat frame 13 will be described. As shown in FIG. 2, the seat frame 13 includes a pair of side seat frames 20 extending in the front-rear direction, and a front seat extending in the left-right direction (the lateral width direction of the chair 1) connecting the pair of side seat frames 20. The frame 22 and the rear seat frame 21 are formed in a rectangular shape with a large opening at the top and bottom (see FIGS. 6A and 7), and the side seat frame 20, the front seat frame 22 and the rear constituting the seat frame 13 are formed. The seat frame 21 is made of a metallic material. In FIG. 6, (A) shows the case where the seat frame 13 is viewed from the front side, (B) is a cross-sectional view taken along the line AA in (A), and (C) is B in (A). -B sectional drawing is shown, and in Drawing 6 (A)-(C), the upper part of a paper surface becomes the front and the lower part becomes the back. 3A to 3C are similar to FIGS. 6A to 6C, and FIG. 3D is a right side view of FIG.

前座枠２２は、薄い金属板で後座枠２１よりも縦方向に短尺の略コの字状に形成され、その上下に折り返された座枠１３の内方向に向かう折返片２２ａ、ｂの両端には、タッピングネジ２５（図３、６参照）で側座枠２０と固着するための取付孔２３が穿設されている。また、前座枠２２の上角部には、アール面２２ｃが形成されており、このアール面２２ｃは、座板１２の突起板１５の形状に合わせて設けられているものである。 The front seat frame 22 is formed of a thin metal plate in a substantially U-shape that is shorter than the rear seat frame 21 in the vertical direction, and both ends of the folded pieces 22a and b facing inward of the seat frame 13 folded up and down. Are provided with attachment holes 23 for fixing to the side seat frame 20 with tapping screws 25 (see FIGS. 3 and 6). Further, a rounded surface 22 c is formed at the upper corner of the front seat frame 22, and the rounded surface 22 c is provided in accordance with the shape of the protruding plate 15 of the seat plate 12.

前座枠２２よりも縦方向に長尺の後座枠２１は、前座枠２２と同様に薄い金属板で略コの字状に形成され、その上下に折り返された座枠１３の内方向に向かう折返片２１ａ、ｂの両端には、タッピングネジ２６（図３、６参照）で側座枠２０と締結するための取付孔１９が穿設されている。なお、後座枠２１の上側で折り返された折返片２１ａには、上述した座板１２の係止片１２ｂが係止されるようになっている。 The rear seat frame 21 which is longer in the vertical direction than the front seat frame 22 is formed in a substantially U-shape with a thin metal plate in the same manner as the front seat frame 22, and goes inward of the seat frame 13 folded up and down. At both ends of the folded pieces 21a, 21b, mounting holes 19 are formed for fastening to the side seat frame 20 with tapping screws 26 (see FIGS. 3 and 6). The above-described locking piece 12b of the seat plate 12 is locked to the folded piece 21a that is folded back on the upper side of the rear seat frame 21.

側座枠２０は、前座枠２２及び後座枠２１よりも肉厚の金属板で前方に向かってテーパー状の細長い略台形状に形成され、その前後方向の略中央には、座枠１３の内方向に向かって突出する矩形板状の係合突片２０ａが突設されている。この係合突片２０ａには、上述した座板１２の係止片１２ａが前方側から嵌合して係止されるようになっている。なお、この係合突片２０ａは、係止片１２ａが嵌合し易いように、その前端側がテーパー状に形成されている。 The side seat frame 20 is formed of a metal plate that is thicker than the front seat frame 22 and the rear seat frame 21 and is formed in an elongated trapezoidal shape having a taper shape toward the front. A rectangular plate-like engagement protrusion 20a protruding inward is provided. The engaging protrusions 20a are adapted to be engaged and locked with the locking pieces 12a of the seat plate 12 described above from the front side. In addition, the front end side of this engagement protrusion 20a is formed in a taper shape so that the engagement piece 12a can be easily fitted.

側座枠２０の前側には、座枠１３の内方向に向かって膨出し前座枠２２の端部と嵌合する前座枠取付部２７が形成され、前座枠取付部２７の上下には、前座枠２２の取付孔２３と重合する取付孔２８が穿設されている。また、前座枠取付部２７の下端には、下方後側に向かって段状に延在し、裏カバー３０と係合して該裏カバー３０の前端側を係止する受板２９が形成されている。 On the front side of the side seat frame 20, a front seat frame mounting portion 27 is formed which bulges inwardly of the seat frame 13 and fits with an end portion of the front seat frame 22. A mounting hole 28 that overlaps with the mounting hole 23 of the frame 22 is formed. Further, a receiving plate 29 is formed at the lower end of the front seat frame mounting portion 27 so as to extend stepwise toward the lower rear side and engage with the back cover 30 to lock the front end side of the back cover 30. ing.

また、前座枠取付部２７の後方には、側座枠２０の上端から内方向に向かって突出する矩形板状の固定板３１が突設されており、この固定板３１の中央には、座板１２の取付孔１７と重合しタッピングネジ２４（図３、６参照）で座板１２と座枠１３とを締結するための取付孔３２が穿設されている。 In addition, a rectangular plate-shaped fixing plate 31 protruding inward from the upper end of the side seat frame 20 is provided behind the front seat frame mounting portion 27. A mounting hole 32 is formed to overlap the mounting hole 17 of the plate 12 and fasten the seat plate 12 and the seat frame 13 with a tapping screw 24 (see FIGS. 3 and 6).

また、固定板３１の後方には、座枠１３の内方向に向かって相対的に上下に幅広状に突出し、後述のコイルスプリング３４の一端側を係止するブラケット３５が突設されている。なお、このブラケット３５は、一方側の側座枠２０のみに設けられる部材であり、他方側の側座枠２０には、ブラケット３５と対向する位置に、座枠１３の内方向に向かって突出し、後述のダンパー３６の一端側を係止するブラケット３７が突設されている（なお、図７においては、ダンパー３６は図示を省略している）。 In addition, a bracket 35 is provided behind the fixed plate 31 so as to protrude relatively wide in the vertical direction toward the inward direction of the seat frame 13 and to lock one end of a coil spring 34 described later. The bracket 35 is a member provided only on one side seat frame 20, and the other side seat frame 20 projects inward of the seat frame 13 at a position facing the bracket 35. A bracket 37 that locks one end of a damper 36, which will be described later, protrudes (the damper 36 is not shown in FIG. 7).

一方、側座枠２０の後端には、後座枠２１の端部と嵌合する略コの字枠状の後座枠取付部３８が形成され、後座枠取付部３８の上下には、後座枠２１の取付孔１９と重合する取付孔３９が穿設されている。また、後座枠取付部３８の下端前側には、裏カバー３０の後端側をタッピングネジ４０（図３参照）で締結するための固定板４１が形成されている。 On the other hand, at the rear end of the side seat frame 20, a substantially U-shaped rear seat frame mounting portion 38 that fits with the end portion of the rear seat frame 21 is formed. A mounting hole 39 that overlaps with the mounting hole 19 of the rear seat frame 21 is formed. Further, a fixing plate 41 for fastening the rear end side of the back cover 30 with a tapping screw 40 (see FIG. 3) is formed on the front side of the lower end of the rear seat frame mounting portion 38.

また、後座枠取付部３８の前方には、後述する座支持軸３３が貫通すると共に該座支持軸３３を軸受けするブッシュ４２と嵌合する円形の回転孔４３が穿設されている。この回転孔４３は、側座枠２０がブッシュ４２のまわりを回動可能なように該ブッシュ４２と嵌合されている。 In addition, a circular rotation hole 43 is formed in front of the rear seat frame mounting portion 38 so as to pass through a seat support shaft 33 which will be described later and to be fitted with a bush 42 which receives the seat support shaft 33. The rotation hole 43 is fitted to the bush 42 so that the side seat frame 20 can rotate around the bush 42.

また、回転孔４３の周縁には、回転孔４３を挟んで対向するように上側に回転阻止部材４４ａが、下側に回転阻止部材４４ｂが設けられている。この回転阻止部材４４ａ、ｂは、後述する座支持軸３３に取り付けられるストッパ４５ａ、ｂと係合して、座１０の回動角度を規制する部材である。 Further, at the periphery of the rotation hole 43, a rotation prevention member 44a is provided on the upper side and a rotation prevention member 44b is provided on the lower side so as to face each other with the rotation hole 43 interposed therebetween. The rotation blocking members 44a and 44b are members that restrict the rotation angle of the seat 10 by engaging with stoppers 45a and 45b attached to a seat support shaft 33 described later.

座支持軸３３は、金属の材料で角パイプ状に形成され、その両端側には、図８に示すように、ストッパ４５ａ、ｂを取り付けるための取付孔５１が穿設されている。なお、図８は、座支持軸３３にブッシュ４２及びストッパ４５ａ、ｂを取り付ける状態を示す説明図である。また、図８において、座支持軸３３の右側の取付孔５１、ブッシュ４２及びストッパ４５ａ、ｂは図示を省略している。 The seat support shaft 33 is formed of a metal material in the shape of a square pipe, and attachment holes 51 for attaching stoppers 45a and 45b are formed on both ends thereof as shown in FIG. FIG. 8 is an explanatory diagram showing a state in which the bush 42 and the stoppers 45a and 45b are attached to the seat support shaft 33. Further, in FIG. 8, the mounting hole 51 on the right side of the seat support shaft 33, the bush 42, and the stoppers 45a and 45b are not shown.

ストッパ４５ａ、ｂは、金属等の材料で形成されており、ストッパ４５ａは座支持軸３３の上側に、ストッパ４５ｂは座支持軸３３の下側に、それぞれ座支持軸３３を跨ぐように設けられている。また、ストッパ４５ａ、ｂには、座支持軸３３の取付孔５１と重合する取付孔５２、雌ネジ孔５０が穿設されており、つまりストッパ４５ａ、ｂは、図８に示すように、取付孔５２、雌ネジ孔５０を介してボルト５３を螺着することにより、座支持軸３３に取り付けられている。 The stoppers 45a and 45b are made of a material such as metal. The stopper 45a is provided above the seat support shaft 33 and the stopper 45b is provided below the seat support shaft 33 so as to straddle the seat support shaft 33. ing. The stoppers 45a and 45b are provided with a mounting hole 52 and a female screw hole 50 that overlap with the mounting hole 51 of the seat support shaft 33. That is, the stoppers 45a and 45b are attached as shown in FIG. The bolt 53 is screwed through the hole 52 and the female screw hole 50 to be attached to the seat support shaft 33.

座支持軸３３の左上側に位置するストッパ４５ａには、その右側面側にコイルスプリング３４の後端を回動自在に枢着する掛止部材５７（図２、７参照）が一体的に設けられており、つまりコイルスプリング３４は、その前端を回動可能な左側座枠２０のブラケット３５にナット５８で止着され、その後端を回動不能な座支持軸３３に取り付けられたストッパ４５ａの掛止部材５７に回動自在に止着されている。なお、コイルスプリング３４の後端を掛止部材５７に回動自在に止着するには、例えば、掛止部材５７に取付孔を穿設し、この取付孔にコイルスプリング３４の釣り針状に形成した後端部分を引っ掛けるようにすればよい。 The stopper 45a located on the upper left side of the seat support shaft 33 is integrally provided with a latching member 57 (see FIGS. 2 and 7) for pivotally mounting the rear end of the coil spring 34 on the right side surface thereof. That is, the coil spring 34 is fixed to the bracket 35 of the left side seat frame 20 whose front end is rotatable with a nut 58 and the rear end of a stopper 45a attached to the non-rotatable seat support shaft 33. The latch member 57 is fixed to the latch member 57 so as to be rotatable. In order to pivotally attach the rear end of the coil spring 34 to the hooking member 57, for example, a mounting hole is formed in the hooking member 57, and the hooking hole of the coil spring 34 is formed in the mounting hole. The rear end portion may be hooked.

ここで、コイルスプリング３４の後端は、左側座枠２０の回転軸、つまり回転孔４３及び座支持軸３３の中心を通る軸線ＣＬ（図７、８の一点鎖線）よりも上側且つ後側で止着されている。このようにコイルスプリング３４を取り付けることにより、コイルスプリング３４は、図１の右の椅子１に示すように、座１０を跳ね上げて起立させたときに初期状態（コイルスプリング３４が座１０の起立状態を保持するのに必要な程度に僅かに伸張している状態）となり、図１の左の椅子１に示すように、座１０を跳ね上げていない水平のときに付勢状態（コイルスプリング３４が座１０を跳ね上げるのに必要な程度に十分に伸張している状態）となり、これにより常時座１０が起立する付勢力を加えるように付勢部材として機能する。 Here, the rear end of the coil spring 34 is above and on the rear side of the axis CL (the one-dot chain line in FIGS. 7 and 8) passing through the rotation axis of the left seat frame 20, that is, the center of the rotation hole 43 and the seat support shaft 33. It is fastened. By attaching the coil spring 34 in this way, as shown in the right chair 1 in FIG. 1, the coil spring 34 is in an initial state when the seat 10 is flipped up and stood up (the coil spring 34 stands up. 1), and is in a biased state (coil spring 34) when it is horizontal when the seat 10 is not lifted up, as shown in the left chair 1 of FIG. Is sufficiently stretched to the extent necessary to flip up the seat 10), thereby functioning as a biasing member so as to apply a biasing force to keep the seat 10 standing.

一方、座支持軸３３の右上側に位置するストッパ４５ａには、その左側面側にダンパー３６の後端を回動自在に枢着する止着部材５９（図２参照）が一体的に設けられており、つまりダンパー３６は、その前端を回動可能な右側座枠２０のブラケット３７に回動自在に止着され、その後端を回動不能な座支持軸３３に取り付けられたストッパ４５ａの止着部材５９に回動自在に止着されている。 On the other hand, the stopper 45a located on the upper right side of the seat support shaft 33 is integrally provided with a fastening member 59 (see FIG. 2) for pivotally mounting the rear end of the damper 36 on the left side surface thereof. In other words, the damper 36 is rotatably fixed to a bracket 37 of the right seat frame 20 whose front end is rotatable, and a stopper 45a attached to the non-rotatable seat support shaft 33 is fixed to the rear end thereof. Attaching member 59 is rotatably attached.

ここで、ダンパー３６の後端は、左側座枠２０の回転軸、つまり回転孔４３及び座支持軸３３の中心を通る上記軸線ＣＬよりも下側且つ前側で止着されている。なお、ダンパー３６は、シリンダとピストンロッドからなる油圧式等の周知のダンパー装置であって、本実施形態では、このようにダンパー３６を取り付けることにより、ダンパー３６は、図１の左の椅子１に示すように、座１０を跳ね上げていない水平のときにシリンダからのピストンロッドの突出量が最も短くなり、図１の右の椅子１に示すように、座１０を跳ね上げて起立させたときに、その回転動作に伴って徐々にシリンダからのピストンロッドの突出量が長くなり、これによりコイルスプリング３４の付勢力に抗して座１０を緩やかに跳ね上げるように緩衝部材として機能する。 Here, the rear end of the damper 36 is fixed on the lower side and the front side of the axis CL passing through the rotation axis of the left seat frame 20, that is, the center of the rotation hole 43 and the seat support shaft 33. The damper 36 is a known hydraulic damper device including a cylinder and a piston rod. In this embodiment, the damper 36 is attached in this manner, so that the damper 36 is the left chair 1 in FIG. As shown in Fig. 1, when the seat 10 is in a horizontal position where the seat 10 is not lifted up, the protruding amount of the piston rod from the cylinder is the shortest, and as shown in the right chair 1 in FIG. In some cases, the amount of protrusion of the piston rod from the cylinder gradually increases with the rotational movement, thereby functioning as a buffer member so that the seat 10 is gently lifted against the urging force of the coil spring 34.

ブッシュ４２は、樹脂材料で円形状に形成され、その内部に座支持軸３３と同形状の貫通孔５４が穿設されており、つまりブッシュ４２は、この貫通孔５４に座支持軸３３を嵌合して貫通させることにより、座支持軸３３に取り付けられている。また、ブッシュ４２の内側面には、外周方向に突出する２つの係止片５５が、貫通孔５４を挟んで対向するように突設されている（図２、８参照）。この係止片５５は、側座枠２０の回転孔４３にブッシュ４２を嵌合したとき、側座枠２０の側面と当接してブッシュ４２が回転孔４３をすり抜けてしまうのを防止するための部材である。 The bush 42 is formed of a resin material in a circular shape, and a through hole 54 having the same shape as the seat support shaft 33 is formed therein. In other words, the bush 42 fits the seat support shaft 33 in the through hole 54. The seat support shaft 33 is attached by penetrating them together. In addition, two locking pieces 55 projecting in the outer peripheral direction are provided on the inner side surface of the bush 42 so as to face each other with the through hole 54 interposed therebetween (see FIGS. 2 and 8). When the bush 42 is fitted into the rotation hole 43 of the side seat frame 20, the locking piece 55 is in contact with the side surface of the side seat frame 20 to prevent the bush 42 from slipping through the rotation hole 43. It is a member.

裏カバー３０は、図２に示すように、開口した座枠１３の下側を閉塞するように合成樹脂等で略矩形状に形成され、その前側両端には、側座枠２０の受板２９と係合する上方に突出した係止片６０と、その後側両端には、側座枠２０の固定板４１とタッピングネジ４０（図３参照）で締結されるボス６１が上方に突設されている。つまり、裏カバー３０は、係止片６０にて受板２９に係合させた状態でボス６１を固定板４１とタッピングネジ４０にて締結することで、側座枠２０に取り付けられるようになっている。 As shown in FIG. 2, the back cover 30 is formed in a substantially rectangular shape with synthetic resin or the like so as to close the lower side of the opened seat frame 13, and receiving plates 29 of the side seat frame 20 are provided at both front ends thereof. A locking piece 60 that protrudes upward to engage with the boss 61 and a boss 61 that is fastened by a fixing plate 41 of the side seat frame 20 and a tapping screw 40 (see FIG. 3) project upward from both ends on the rear side. Yes. That is, the back cover 30 is attached to the side seat frame 20 by fastening the boss 61 with the fixing plate 41 and the tapping screw 40 while being engaged with the receiving plate 29 by the locking piece 60. ing.

側部材５は、金属性の材料により形成され、図２に示すように、座１０方向に突出した座支持軸３３の端部を受けて該座支持軸３３を嵌合する軸受部材６３が突設されている。また、側部材５は、軸受部材６３に嵌合した座支持軸３３を上方から押さえ込んで、軸受部材６３とで座支持軸３３を挟着するように固定する上板６４と、この上板６４を覆うように軸受部材６３に取り付けられる覆い部材６５とを有している。なお、軸受部材６３、上板６４、覆い部材６５には、それぞれが重合する雌ネジ孔６７、取付孔６８、６９が穿設されており、座支持軸３３は、これら雌ネジ孔６７、取付孔６８、６９をボルト６６で螺着することにより、側部材５に固定されるようになっている。 The side member 5 is made of a metallic material, and as shown in FIG. 2, a bearing member 63 that receives the end of the seat support shaft 33 projecting in the direction of the seat 10 and fits the seat support shaft 33 projects. It is installed. Further, the side member 5 presses the seat support shaft 33 fitted to the bearing member 63 from above, and fixes the seat support shaft 33 so as to sandwich the seat support shaft 33 with the bearing member 63, and the upper plate 64. And a cover member 65 attached to the bearing member 63. The bearing member 63, the upper plate 64, and the cover member 65 are provided with female screw holes 67 and mounting holes 68 and 69 that are overlapped with each other. The holes 68 and 69 are screwed with bolts 66 to be fixed to the side member 5.

２．椅子１の組み立て
次に、以上のように構成される椅子１を組み立てる場合について、図２、７〜１０を参照しながら説明する。なお、図９は、座板１２を座枠１３に取り付けるときの状態を示す斜視図、図１０は、図３（Ａ）の左側の係止片１２ａ付近の拡大Ｃ−Ｃ断面図及び図３（Ａ）の係止片１２ｂ付近の拡大Ｄ−Ｄ断面図である。 2. Assembly of Chair 1 Next, the case of assembling the chair 1 configured as described above will be described with reference to FIGS. 9 is a perspective view showing a state where the seat plate 12 is attached to the seat frame 13, and FIG. 10 is an enlarged CC cross-sectional view of the vicinity of the locking piece 12a on the left side of FIG. It is expanded DD sectional drawing of the latching piece 12b vicinity of (A).

まず、椅子１を組み立てるには、図８に示すように、座支持軸３３の取付孔５１にストッパ４５ａ、ｂの取付孔５２、雌ネジ孔５０を重ね、この取付孔５１及び取付孔５２、雌ネジ孔５０にボルト５３を螺着することにより、座支持軸３３の両端側にストッパ４５ａ、ｂを取り付ける。そして、ストッパ４５ａ、ｂを取り付けた座支持軸３３両端の外側から、ブッシュ４２を、ブッシュ４２が有する貫通孔５４にて座支持軸３３に嵌合貫通させて座支持軸３３に取り付ける。この際、ブッシュ４２は、その内側面がストッパ４５ａ、ｂの右側面に当接するまで押し込むようにして座支持軸３３に取り付ける。 First, to assemble the chair 1, as shown in FIG. 8, the mounting holes 51 of the stoppers 45 a and b and the female screw holes 50 are overlapped on the mounting holes 51 of the seat support shaft 33, and the mounting holes 51 and 52. The bolts 53 are screwed into the female screw holes 50 to attach the stoppers 45a and 45b to both end sides of the seat support shaft 33. Then, from the outside of both ends of the seat support shaft 33 to which the stoppers 45a and 45b are attached, the bush 42 is fitted through the seat support shaft 33 through the through holes 54 of the bush 42 and attached to the seat support shaft 33. At this time, the bush 42 is attached to the seat support shaft 33 such that the bush 42 is pushed in until the inner surface abuts against the right side surface of the stoppers 45a and 45b.

次に、左側座枠２０の前座枠取付部２７に前座枠２２の左端を嵌合して側座枠２０の取付孔２８に前座枠２２の取付孔２３を重ね、この取付孔２８、２３にタッピングネジ２５（図３、６参照）を螺着することにより、前座枠２２を左側座枠２０に取り付ける。次に、左側座枠２０の後座枠取付部３８に後座枠２１の左端を嵌合して左側座枠２０の取付孔３９に後座枠２１の取付孔１９を重ね、この取付孔３９、１９にタッピングネジ２６（図３、６参照）を螺着することにより、後座枠２１を左側座枠２０に取り付ける。なお、左側座枠２０への前座枠２２及び後座枠２１の組み付け順は、前後してよい。 Next, the left end of the front seat frame 22 is fitted to the front seat frame mounting portion 27 of the left seat frame 20, and the mounting hole 23 of the front seat frame 22 is overlaid on the mounting hole 28 of the side seat frame 20. The front seat frame 22 is attached to the left seat frame 20 by screwing a tapping screw 25 (see FIGS. 3 and 6). Next, the left end of the rear seat frame 21 is fitted to the rear seat frame mounting portion 38 of the left seat frame 20, and the mounting hole 19 of the rear seat frame 21 is overlapped with the mounting hole 39 of the left seat frame 20. 19, the tapping screw 26 (see FIGS. 3 and 6) is screwed to attach the rear seat frame 21 to the left seat frame 20. The order of assembling the front seat frame 22 and the rear seat frame 21 to the left seat frame 20 may be changed.

次に、座支持軸３３に取り付けた左側のブッシュ４２を左側座枠２０の回転孔４３に回動可能に嵌合し、座支持軸３３を左側座枠２０に、その左端が外方向に貫通するように取り付ける。この際、ブッシュ４２の係止片が左側座枠２０の内面に当接するまで押し込むようにして、座支持軸３３を左側座枠２０に取り付ける。なお、座支持軸３３を左側座枠２０に組み付けてから、前座枠２２及び後座枠２１を左側座枠２０に組み付けるようにしてもよい。 Next, the left bush 42 attached to the seat support shaft 33 is rotatably fitted in the rotation hole 43 of the left seat frame 20, and the seat support shaft 33 penetrates the left seat frame 20 with its left end penetrating outward. Attach as shown. At this time, the seat support shaft 33 is attached to the left seat frame 20 so as to be pushed in until the locking piece of the bush 42 contacts the inner surface of the left seat frame 20. The seat support shaft 33 may be assembled to the left seat frame 20 and then the front seat frame 22 and the rear seat frame 21 may be assembled to the left seat frame 20.

次に、上記の組み付け手順に準じて、座支持軸３３を右側座枠２０に取り付け、次に、右側座枠２０に前座枠２２及び後座枠２１を取り付ける。これにより、座枠１３は、ブッシュ４２のまわりを回動可能に座支持軸３３にて軸支されることになる。なお、左側座枠２０よりも先に、右側座枠２０に座支持軸３３、前座枠２２及び後座枠２１を取り付けるようにしてもよい。 Next, according to the above assembly procedure, the seat support shaft 33 is attached to the right seat frame 20, and then the front seat frame 22 and the rear seat frame 21 are attached to the right seat frame 20. As a result, the seat frame 13 is pivotally supported by the seat support shaft 33 so as to be rotatable around the bush 42. Note that the seat support shaft 33, the front seat frame 22, and the rear seat frame 21 may be attached to the right seat frame 20 before the left seat frame 20.

また、上述した座枠１３の組み付け手順は、次のようにしてもよい。即ち、左右側座枠２０、前座枠２２及び後座枠２１を組み付けて先ず座枠１３外周の矩形枠体を完成させ、次にブッシュ４２を取り付けた座支持軸３３を左右側座枠２０の回転孔４３に貫通し、最後にストッパ４５ａ、ｂを座支持軸３３に取り付けることで、ブッシュ４２を座支持軸３３に位置固定して回転孔４３に回動可能に嵌合することで、座枠１３を組み付けるようにしてもよい。 The above-described procedure for assembling the seat frame 13 may be as follows. That is, the left and right side seat frames 20, the front seat frame 22 and the rear seat frame 21 are assembled to complete a rectangular frame on the outer periphery of the seat frame 13, and then the seat support shaft 33 to which the bush 42 is attached is attached to the left and right side seat frames 20. By passing through the rotation hole 43 and finally attaching the stoppers 45a and 45b to the seat support shaft 33, the bushing 42 is fixed to the seat support shaft 33 and fitted into the rotation hole 43 so as to be rotatable. The frame 13 may be assembled.

次に、コイルスプリング３４を、その後端を左側のストッパ４５ａに設けられた掛止部材５７に座枠１３の回動に伴って回動可能に止着すると共に、その前端を左側座枠２０のブラケット３５にナット５８で回動不能に止着する。次に、ダンパー３６を、その後端を右側のストッパ４５ａに設けられた止着部材５９に座枠１３の回動に伴って回動可能に止着すると共に、その前端を右側座枠２０のブラケット３７に回動可能に止着する。これにより、コイルスプリング３４は掛止部材５７の止着箇所を中心にして、ダンパー３６は止着部材５９の止着箇所を中心にして、回動可能に設けられることになる。なお、座枠１３へのコイルスプリング３４及びダンパー３６の組み付け順は、前後してよい。 Next, the coil spring 34 is fixed to the latch member 57 provided at the left stopper 45a at the rear end thereof so as to be rotatable with the rotation of the seat frame 13, and the front end of the coil spring 34 is fixed to the left seat frame 20. The bracket 35 is fixed to the bracket 35 with a nut 58 so as not to rotate. Next, the damper 36 is fixed to the fixing member 59 provided at the right end stopper 45a at the rear end thereof so that the damper 36 can rotate as the seat frame 13 rotates, and the front end thereof is attached to the bracket of the right seat frame 20. It is fixed to 37 so that it can rotate. As a result, the coil spring 34 is provided so as to be rotatable about the fastening location of the retaining member 57 and the damper 36 is pivotable about the fastening location of the fastening member 59. In addition, the assembly order of the coil spring 34 and the damper 36 to the seat frame 13 may be changed.

次に、クッション１１の裏面側に組み付けられた座板１２を、図９（なお、図９においては、クッション１１は図示を省略している）に示すように、座板１２の左右中央の係止片１２ａ、ｂが座枠１３の係合突片２０ａより前側に位置するように、座板１２を座枠１３に宛がい、矢印Ａに示すように、座板１２を前方から後方にスライドするように移動させる。 Next, as shown in FIG. 9 (in FIG. 9, the cushion 11 is not shown), the seat plate 12 assembled on the back side of the cushion 11 is connected to the left and right center of the seat plate 12. The seat plate 12 is directed to the seat frame 13 so that the stop pieces 12a and 12b are located in front of the engaging protrusion 20a of the seat frame 13, and the seat plate 12 is slid from the front to the rear as indicated by the arrow A. Move to do.

すると、図１０（Ａ）に示すように、座板１２の裏面側に下方に突出する外方向に開口されたＬ字形の係止片１２ａ、ｂと座枠１３の係合突片２０ａ及び折返片２１ａとが嵌合し、つまり、矩形水平片１８ｂと座板１２本体との隙間（矩形垂直片１８ａ部分）に係合突片２０ａ及び折返片２１ａが嵌合し、係合突片２０ａ及び折返片２１ａが矩形水平片１８ｂと座板１２本体とで挟着される。 Then, as shown in FIG. 10 (A), L-shaped locking pieces 12a and 12b projecting downward on the back surface side of the seat plate 12 and the engaging projections 20a and folding of the seat frame 13 are folded back. That is, the engagement projection piece 20a and the folded piece 21a are fitted in the gap (rectangular vertical piece 18a portion) between the rectangular horizontal piece 18b and the seat plate 12 main body, and the engagement projection piece 20a and The folded piece 21a is sandwiched between the rectangular horizontal piece 18b and the seat plate 12 main body.

この際、座枠１３に対して座板１２を前方から後方にスライドすると、係止片１２ｂの矩形垂直片１８ａが折返片２１ａに当接し、突起板１５が前座枠２２に当接する。つまり、これら係止片１２ｂ（矩形垂直片１８ａ）及び突起板１５は、座板１２を座枠１３に取り付けるときの座板１２の位置決め手段としての機能を有している。さらに、係合突片２０ａは、係止片１２ａが嵌合し易いように、その前端側がテーパー状に形成されているので、このような構成により、座枠１３は一方向にスライドさせるだけで、極めて容易にワンタッチで座枠１３に取り付けることができる。 At this time, when the seat plate 12 is slid from the front to the rear with respect to the seat frame 13, the rectangular vertical piece 18 a of the locking piece 12 b comes into contact with the folded piece 21 a and the projection plate 15 comes into contact with the front seat frame 22. That is, the locking pieces 12 b (rectangular vertical pieces 18 a) and the protruding plate 15 have a function as positioning means for the seat plate 12 when the seat plate 12 is attached to the seat frame 13. Furthermore, since the front end side of the engaging protrusion 20a is formed in a tapered shape so that the engaging piece 12a can be easily fitted, the seat frame 13 can be simply slid in one direction. It can be very easily attached to the seat frame 13 with one touch.

次に、係止片１２ａ、ｂに係合突片２０ａ及び折返片２１ａを嵌合すると、座枠１３の固定板３１の取付孔３２と座板１２の取付孔１７とが重合するので、この取付孔３２、１７にタッピングネジ２４（図３、６参照）を螺着することにより、座板１２を座枠１３に締結する。これにより座板１２は座枠１３にしっかりと固定される。 Next, when the engaging protrusions 20a and the folded pieces 21a are fitted to the locking pieces 12a, b, the mounting holes 32 of the fixing plate 31 of the seat frame 13 and the mounting holes 17 of the seat plate 12 are superposed. The seat plate 12 is fastened to the seat frame 13 by screwing the tapping screws 24 (see FIGS. 3 and 6) into the mounting holes 32 and 17. As a result, the seat plate 12 is firmly fixed to the seat frame 13.

次に、座板１２を座枠１３に固定したら、裏カバー３０の係止片６０を座枠１３の受板２９に係合し、裏カバー３０のボス６１を座枠１３の固定板４１とタッピングネジ４０で締結して、裏カバー３０を座枠１３に取り付ける。これにより、座１０が組み立てられる。なお、座枠１３への座板１２及び裏カバー３０の組み付け順は、前後してよい。 Next, when the seat plate 12 is fixed to the seat frame 13, the locking piece 60 of the back cover 30 is engaged with the receiving plate 29 of the seat frame 13, and the boss 61 of the back cover 30 is connected to the fixing plate 41 of the seat frame 13. The back cover 30 is attached to the seat frame 13 by fastening with the tapping screw 40. Thereby, the seat 10 is assembled. The order of assembling the seat plate 12 and the back cover 30 to the seat frame 13 may be changed.

次に、座枠１３に座板１２及び裏カバー３０を組み付けて座１０を組み立てたら、座枠１３から左右に突出している座支持軸３３の両端を側部材５の軸受部材６３に嵌合し、この嵌合した座支持軸３３の上方に上板６４を配置して軸受部材６３とで座支持軸３３を挟み込み、この状態で覆い部材６５を上板６４を覆うように軸受部材６３に宛がって、これら軸受部材６３、上板６４、覆い部材６５の雌ネジ孔６７、取付孔６８、６９を重ねてボルト６６で螺着する。これにより、座１０は側部材５に組み付けられて椅子１の組み立てが完了する。 Next, when the seat 10 is assembled by assembling the seat plate 12 and the back cover 30 to the seat frame 13, both ends of the seat support shaft 33 protruding left and right from the seat frame 13 are fitted to the bearing members 63 of the side member 5. The upper plate 64 is disposed above the fitted seat support shaft 33, the seat support shaft 33 is sandwiched between the bearing member 63, and the cover member 65 is directed to the bearing member 63 so as to cover the upper plate 64 in this state. Accordingly, the bearing member 63, the upper plate 64, the female screw hole 67 of the cover member 65, and the mounting holes 68, 69 are overlapped and screwed with the bolt 66. Thereby, the seat 10 is assembled to the side member 5 and the assembly of the chair 1 is completed.

しかして、使用者が椅子１に着座して座板１２の中心付近に、図１０（Ｂ）に示すように荷重Ｐが印加されると、合成樹脂等の弾性部材で形成され且つ多数の溝１４が穿設されている座板１２は、図１０（Ｂ）の二点鎖線に示すように下方に撓んで変形する。この際、座板１２は、中心付近の撓み量が最も大きいため、全体が座板１２の中心方向に引っ張られるように変形するので、座枠１３の係合突片２０ａ及び折返片２１ａに係止されていた４つの係止片１２ａ、ｂは、その外方向に開口されたＬ字形の形状と、係止片１２ａ、ｂの上方に形成されている切欠部１６ａ、ｂにより、下方向且つ座板１２の中心方向に、座板１２が座枠１３から外れない（座板１２の係止片１２ａ、ｂが設けられている三辺が座枠１３から外れない）程度に移動し、柔軟に保持されるようになっている。 Then, when the user is seated on the chair 1 and a load P is applied near the center of the seat plate 12 as shown in FIG. 10B, it is formed of an elastic member such as a synthetic resin and has a large number of grooves. The seat plate 12 with the holes 14 is bent downward and deformed as indicated by a two-dot chain line in FIG. At this time, since the seat plate 12 has the largest amount of bending near the center, the entire seat plate 12 is deformed so as to be pulled in the center direction of the seat plate 12, so that the seat plate 12 is engaged with the engaging protrusions 20a and the folded pieces 21a. The four locking pieces 12a, b that have been stopped are formed in a downward direction by an L-shaped shape that opens outwardly and the notches 16a, b formed above the locking pieces 12a, b. The seat plate 12 moves in the center direction of the seat plate 12 so as not to be detached from the seat frame 13 (the three sides on which the locking pieces 12a and 12b of the seat plate 12 are provided do not come off from the seat frame 13) and are flexible. Is supposed to be retained.

３．本実施形態の効果
（１）本実施形態に係る椅子１は、合成樹脂等の弾性部材から成る支承体としての座板１２の前側一辺をタッピングネジ２４の締結にて座枠１３に固着保持すると共に、残りの左右後側三辺は、座板１２の裏面側から下方に突出するＬ字形の外方向に開口された４つの係止片１２ａ、ｂで、座枠１３の係合突片２０ａ及び折返片２１ａを挟持するように保持することで、座板１２を座枠１３に取り付けるように構成したので、使用者が椅子１に着座して座板１２がその中心方向に引っ張られるように撓曲変形しても、係止片１２ａ、ｂは下方向且つ座板１２の中心方向に座板１２が座枠１３から外れない程度に移動して柔軟に保持されるので、その結果、座板１２前側の座枠１３との締結部分に応力が集中して、この締結部分が破損してしまうことを防止することができる。また、座板１２の弾性変形による柔軟性を十分に発揮でき、快適な着座感を得ることもできる。 3. Effects of the present embodiment (1) The chair 1 according to the present embodiment securely holds the front side of the seat plate 12 as a support body made of an elastic member such as a synthetic resin to the seat frame 13 by fastening a tapping screw 24. In addition, the remaining three sides on the left and right rear sides are four engaging pieces 12a and 12b that are L-shaped outwardly projecting downward from the back side of the seat plate 12, and are engaging protrusions 20a of the seat frame 13. Since the seat plate 12 is attached to the seat frame 13 by holding the folded piece 21a so that the user can sit on the chair 1 and the seat plate 12 is pulled in the center direction. Even if it is bent and deformed, the locking pieces 12a and 12b are moved downwardly and in the center direction of the seat plate 12 so that the seat plate 12 does not come off the seat frame 13 and are held flexibly. Stress is concentrated on the fastening portion with the seat frame 13 on the front side of the plate 12, and this fastening portion It is possible to prevent the minutes from being damaged. Moreover, the softness | flexibility by the elastic deformation of the seat board 12 can fully be exhibited, and a comfortable seating feeling can also be acquired.

（２）係止片１２ａは、座板１２裏面の左右側であって、その前後方向の略中央に一対移動の自由度を保持したまま係合突片２０ａを挟持して設けられているので、荷重により座板１２が撓曲変形しても、座板１２の水平移動に柔軟に追従しつつ、座板１２と座枠１３の密着をある程度保つことができ、その結果、係合突片２０ａに対する支持強度が増し、荷重による座板１２前端の座枠１３との締結部分への負荷をさらに軽減することができると共に、係止片１２ａの耐久性を向上することができる。 (2) Since the locking piece 12a is provided on the left and right sides of the back surface of the seat plate 12 and sandwiching the engaging protruding piece 20a while maintaining a degree of freedom of movement at a substantial center in the front-rear direction. Even if the seat plate 12 is bent and deformed by the load, the seat plate 12 and the seat frame 13 can be kept in close contact with each other while flexibly following the horizontal movement of the seat plate 12, and as a result, the engagement protrusion The support strength for 20a can be increased, and the load on the fastening portion between the front end of the seat plate 12 and the seat frame 13 due to the load can be further reduced, and the durability of the locking piece 12a can be improved.

（３）座板１２には、係止片１２ａ、ｂの上方に切欠部１６ａ、ｂが穿設されているので、座板１２に荷重が印加されたときの係止片１２ａ、ｂの下方向且つ座板１２の中心方向への移動が容易となり、つまり切欠部１６ａ、ｂは、係止片１２ａ、ｂの移動をスムースにして座板１２の弾性変形を補助する機能を有している。その結果、座板１２の弾性変形による柔軟性をさらに発揮でき、着座感をさらに向上させることができる。 (3) Since the seat plate 12 is provided with notches 16a and b above the locking pieces 12a and b, below the locking pieces 12a and b when a load is applied to the seat plate 12. The notches 16a and b have a function of assisting the elastic deformation of the seat plate 12 by smoothly moving the locking pieces 12a and 12b. . As a result, the flexibility due to the elastic deformation of the seat plate 12 can be further exhibited, and the seating feeling can be further improved.

（４）座枠１３に対して座板１２を前方から後方の一方向にスライドさせるだけで、係止片１２ａ、ｂと係合突片２０ａ及び折返片２１ａとを嵌合することができ、しかも、この際、係合突片２０ａの前端側がテーパー状に形成され、且つ係止片１２ｂの矩形垂直片１８ａが折返片２１ａに当接し、突起板１５が前座枠２２に当接するので、つまりこれら係止片１２ｂ（矩形垂直片１８ａ）及び突起板１５が、座板１２を座枠１３に取り付けるときの座板１２の位置決め手段として機能するので、その結果、座枠１３への座板１２の取り付け作業が極めて容易となり、ワンタッチで座板１２を座枠１３に取り付けることが可能になる。 (4) By simply sliding the seat plate 12 in one direction from the front to the back with respect to the seat frame 13, the engaging pieces 12a, b, the engaging protrusions 20a and the folded pieces 21a can be fitted, In addition, at this time, the front end side of the engaging projection piece 20a is formed in a taper shape, and the rectangular vertical piece 18a of the locking piece 12b comes into contact with the folded piece 21a, and the projection plate 15 comes into contact with the front seat frame 22, that is, Since these locking pieces 12b (rectangular vertical pieces 18a) and the protruding plate 15 function as positioning means for the seat plate 12 when the seat plate 12 is attached to the seat frame 13, the seat plate 12 to the seat frame 13 is consequently obtained. This makes it possible to attach the seat plate 12 to the seat frame 13 with one touch.

（５）係止片１２ｂは、座枠１３を構成する後座枠２１の折返片２１ａと嵌合するように構成されており、この後座枠２１は、椅子１が座跳ね上げ式の場合には一般的にコの字形に形成されるので、従って、係止片１２ｂは、他の構成が異なるどのような種類の座跳ね上げ式の椅子１にもそのまま対応することができ、極めて使い勝手がよい。 (5) The locking piece 12b is configured to be fitted to the folded piece 21a of the rear seat frame 21 that constitutes the seat frame 13, and the rear seat frame 21 is a case where the chair 1 is a flip-up type. Is generally formed in a U-shape, and therefore the locking piece 12b can be used as it is for any kind of flip-up type chair 1 having a different configuration, and is extremely easy to use. Is good.

以上、本発明の実施形態に係わる椅子１を図面に基づいて説明してきたが、具体的な構成は実施形態に示したもの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ける変更や追加などがあっても本発明に含まれる。 As mentioned above, although the chair 1 concerning embodiment of this invention has been demonstrated based on drawing, a concrete structure is not limited to what was shown in embodiment, The change in the range which does not deviate from the summary of this invention And additions are included in the present invention.

例えば、上述した実施形態においては、椅子１は座跳ね上げ式椅子として説明したが、これは限定するものではなく、また、支承体は座１０（座板１２）として説明したが、これは背凭れ３（背板）であってもよい。なお、支承体を背凭れ３（背板）とした場合には、座板１２に対応する背板に係止片１２ａ、ｂを、座枠１３に対応する背板の支持枠に係合突片２０ａ及び折返片２１ａを、上記に準じて設けるようにすればよい。 For example, in the embodiment described above, the chair 1 has been described as a flip-up chair, but this is not limited, and the support body has been described as a seat 10 (seat plate 12). It may be drooping 3 (back plate). When the support body is the backrest 3 (back plate), the locking pieces 12a and 12b are engaged with the back plate corresponding to the seat frame 12 and the back plate support frame corresponding to the seat frame 13 is engaged. The piece 20a and the folded piece 21a may be provided according to the above.

また、座板１２の前端の一辺をタッピングネジ２４にて座枠１３に螺着して固定するようにしたが、この固定手段は、限定することなく、例えば圧着、嵌着、接着等であってもよい。また、係止片１２ａ、ｂや係合突片２０ａの数や位置は、上記した数や位置に限定するものではない。また、座板１２は、クッション１１の前垂れ部１１ａに対応して突起板１５を設けるようにしたが、これは、クッション１１に前垂れ部１１ａのない構成に対応して、突起板１５がない平板状に形成してもよい。 In addition, one side of the front end of the seat plate 12 is screwed and fixed to the seat frame 13 with the tapping screw 24. However, this fixing means is not limited, and may be, for example, crimping, fitting, or bonding. May be. Further, the numbers and positions of the locking pieces 12a and 12b and the engaging protrusions 20a are not limited to the above numbers and positions. In addition, the seat plate 12 is provided with the projection plate 15 corresponding to the front hanging portion 11a of the cushion 11, but this is a flat plate without the projection plate 15 corresponding to the configuration in which the cushion 11 does not have the front hanging portion 11a. You may form in a shape.

１…椅子、３…背凭れ、
５…側部材、６…固着部、
７…肘掛部、１０…座、
１１…クッション、１１ａ…前垂れ部、
１２…座板、１２ａ、１２ｂ、５５、６０…係止片、
１３…座枠、１４…溝、
１５…突起板、１６ａ、１６ｂ…切欠部、
１７、１９、２３、２８、３２、３９、５１、５２、６８、６９…取付孔、
１８ａ…矩形垂直片、１８ｂ…矩形水平片、
２０…側座枠、２０ａ…係合突片、
２１…後座枠、２１ａ、２２ａ、２２ｂ…折返片、
２２…前座枠、２２ｃ…アール面、
２４、２５、２６、４０…タッピングネジ、２７…前座枠取付部、
２９…受板、３０…裏カバー、
３１、４１…固定板、３３…座支持軸、
３４…コイルスプリング、３５、３７…ブラケット、
３６…ダンパー、３８…後座枠取付部、
４２…ブッシュ、４３…回転孔、
４４ａ、４４ｂ…回転阻止部材、４５ａ、４５ｂ…ストッパ、
５０、６７…雌ネジ孔、５３、６６…ボルト、
５４…貫通孔、５７…掛止部材、
５８…ナット、５９…止着部材、
６１…ボス、６３…軸受部材、
６４…上板、６５…覆い部材。 1 ... chair, 3 ... backrest,
5 ... side member, 6 ... adhering part,
7 ... armrests, 10 ... seats,
11 ... Cushion, 11a ... Front hanging part,
12 ... Seat plate, 12a, 12b, 55, 60 ... Locking piece,
13 ... seat frame, 14 ... groove,
15 ... Projection plate, 16a, 16b ... Notch,
17, 19, 23, 28, 32, 39, 51, 52, 68, 69 ... mounting holes,
18a ... rectangular vertical piece, 18b ... rectangular horizontal piece,
20 ... side seat frame, 20a ... engagement protrusion,
21 ... rear seat frame, 21a, 22a, 22b ... folded piece,
22 ... Front seat frame, 22c ... Earl surface,
24, 25, 26, 40 ... tapping screws, 27 ... front seat frame mounting part,
29 ... backing plate, 30 ... back cover,
31, 41 ... fixed plate, 33 ... seat support shaft,
34 ... Coil spring, 35, 37 ... Bracket,
36 ... damper, 38 ... rear seat frame mounting part,
42 ... Bush, 43 ... Rotating hole,
44a, 44b ... rotation blocking member, 45a, 45b ... stopper,
50, 67 ... female screw holes, 53, 66 ... bolts,
54 ... Through hole 57 ... Hanging member,
58 ... nuts, 59 ... fastening members,
61 ... Boss, 63 ... Bearing member,
64: upper plate, 65: covering member.

Claims

A chair support body mounting structure for attaching a support body such as a seat plate and a back plate formed of an elastic member such as a synthetic resin to a support frame of the chair body,
The support body is generally formed in a substantially rectangular plate shape, one side of which is fixedly held on the support frame by fastening means, and the remaining three sides protrude from the back side of the support body. A support body mounting structure for a chair, wherein the support body is attached to the support frame by holding the engaging member of the support frame so as to be held by a locking member that is opened outward.

The support body mounting structure for a chair according to claim 1, wherein a notch portion is formed in a surface of the support body facing the locking member.

The said support body is slid to one direction, At least 1 of the said locking member contact | abuts to the said engagement member, The attachment position with respect to the said support frame of this support body is prescribed | regulated by this. Claim 3. The chair support body mounting structure according to claim 1 or claim 2.

The chair is a flip-up chair, the support is the seat plate,
The engaging member on one side of the three sides protrudes inwardly from a substantially U-shaped side seat frame extending in a lateral width direction constituting the support frame of the seat-up type chair. The chair support body mounting structure according to any one of claims 1 to 3 , wherein the folding member is a folded piece.