JP2010046250A - Flip-up seat chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flip-up seat chair which facilitates assembling and detaching a seat support shaft to and from a seat and maintenance work of respective members or the like by forming the seat support shaft into a divided structure. <P>SOLUTION: The seat support shaft 10 for turnably supporting a seat includes: a pair of right and left shaft members 10a which turnably supports the side end part of the seat 3 and in which an outer side end part projecting at the side part of the seat 3 is supported by a side leg; and connection means 11 and 14 which connect the facing end parts of both shaft members 10a with each other with such a clearance S that the outer side end parts of the right and left shaft members 10a can be removed to the inner part from a support hole 25 at the side end part of the seat 3. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

本発明は、例えば劇場や映画館、スタジアム等に設置される座跳ね上げ式の椅子に関する。   The present invention relates to a flip-up chair installed in, for example, a theater, a movie theater, a stadium, or the like.

座跳ね上げ式の従来の椅子としては、例えば特許文献１〜３に記載されているものがある。
特開平１０−７５８４１号公報 特開平１１−１７８６６９号公報 特許第３３２１７２７号公報 As a conventional chair of a flip-up type, for example, there are those described in Patent Documents 1 to 3.
Japanese Patent Laid-Open No. 10-75841 Japanese Patent Laid-Open No. 11-178669 Japanese Patent No. 3321727

上記特許文献１〜３に記載されている椅子は、いずれも、座を上向きに回動可能に支持する座支持軸は、左右方向に長い１本のものよりなり、この座支持軸における座の側面より突出する両側端部を、左右の側脚により支持している。
また、この座支持軸に、座を跳ね上げるねじりコイルばねや、ねじりコイルばねが巻回されたスリーブを嵌合したり、ばねの一端を係止する係止部材を取り付けたり、または、座の跳ね上げが緩やかに行われる跳ね上げ制御機構を設けたりしている。 In each of the chairs described in Patent Documents 1 to 3, the seat support shaft that supports the seat so as to be pivotable upward is composed of one that is long in the left-right direction. Both end portions protruding from the side surfaces are supported by left and right side legs.
In addition, a torsion coil spring that raises the seat, a sleeve around which the torsion coil spring is wound, or a locking member that locks one end of the spring is attached to the seat support shaft, A flip-up control mechanism in which the flip-up is performed slowly is provided.

上記のように、座支持軸を左右方向に長い１本のものとすると、これを座の側方に大きく突出させた状態で、一端を座の側端より挿通するのと同時に、ねじりコイルばね等を座支持軸に嵌合しなければならないので、組付け時の作業性が悪い。特に、劇場等に設置される跳ね上げ式の椅子は、左右複数の椅子が、互いに隣接する側脚により連結されているので、各椅子の座支持軸を座より抜くことができず、従って、椅子を設置したままで、例えばねじりコイルばねの交換等のメンテナンス作業を簡単に行うことができない。   As described above, if the seat support shaft is one long in the left-right direction, the torsion coil spring is inserted at the same time as one end is inserted from the side end of the seat in a state in which the seat support shaft is protruded greatly to the side of the seat. Etc. must be fitted to the seat support shaft, so the workability during assembly is poor. In particular, in the flip-up type chair installed in a theater or the like, since the left and right chairs are connected by the side legs adjacent to each other, the seat support shaft of each chair cannot be pulled out from the seat. For example, maintenance work such as replacement of a torsion coil spring cannot be easily performed with the chair installed.

本発明は、上記問題点に鑑みてなされたもので、座支持軸を分割構造とすることにより、座への座支持軸の組付けや取外し作業、座支持軸への各部材の組付け作業、及び各部材のメンテナンス作業等を容易に行いうるようにした座跳ね上げ式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-described problems. By making the seat support shaft into a divided structure, the seat support shaft is assembled and removed from the seat, and each member is assembled to the seat support shaft. It is another object of the present invention to provide a flip-up chair that can easily perform maintenance work of each member.

本発明によると、上記課題は、次の各項のようにして解決される。
（１）左右の側脚に外側端部が支持された左右方向を向く座支持軸により、両側脚間に配設した座を、ほぼ水平の使用位置と、上向きの不使用位置とに回動可能に支持してなる座跳ね上げ式椅子において、前記座支持軸を、前記座の側端部を回動可能に支持し、かつ座の側方に突出する外側端部が前記側脚により支持された左右１対の軸部材と、両軸部材の対向端部同士を、それらの対向端間に、左右の軸部材の外側端部が座の側端部の支持部より内方に抜き外しうる隙間を設けて連結する連結手段とからなるものとする。 According to the present invention, the above-mentioned problems are solved as follows.
(1) The seat support shaft that faces the left and right sides, with the outer ends supported by the left and right side legs, rotates the seat disposed between the both side legs to a substantially horizontal use position and an upward non-use position. In a seat-up chair that can be supported, the seat support shaft is supported so that the side end of the seat can rotate, and the outer end protruding to the side of the seat is supported by the side leg. The pair of left and right shaft members and the opposite end portions of both shaft members are pulled out inward from the support portions at the side end portions of the seat, with the outer end portions of the left and right shaft members between the opposite ends. And connecting means for connecting with a gap.

このような構成とすると、座支持軸は、左右１対の軸部材と、それらの対向端部同士を連結する連結部材とにより、分割構造とされ、かつ両軸部材の対向端間には、軸部材の外側端部を座の側端部より抜き外し可能な隙間が設けられているので、従来の長寸をなす座支持軸に比して、座への組付けや取外し作業、及び軸部材に装着される部材のメンテナンス作業等を容易に行うことができる。   With such a configuration, the seat support shaft has a split structure by a pair of left and right shaft members and a connecting member that connects the opposed end portions, and between the opposed ends of both shaft members, Since there is a gap that allows the outer end of the shaft member to be removed from the side end of the seat, it is easier to assemble and remove the seat from the seat support shaft, which is longer than conventional seats. Maintenance work or the like of the member mounted on the member can be easily performed.

（２）上記(１)項において、連結手段を、左右の軸部材の対向端部を跨ぐようにして外嵌された１対の連結杆と、左右の軸部材と前記連結杆同士を固定するボルトとナットとからなるものとする。 (2) In the above item (1), the connecting means is fixed to the pair of connecting rods externally fitted so as to straddle the opposite end portions of the left and right shaft members, and the left and right shaft members and the connecting rods. It shall consist of bolts and nuts.

このような構成とすると、左右の軸部材の対向端部同士を、１対の連結杆により強固に連結することができるとともに、座支持軸の中央部の曲げ剛性が大となる。
また、連結手段の両軸部材への着脱作業を、座を跳ね上げた状態で外部から容易に行いうるので、座支持軸の組立てや分解時の作業効率が向上する。 With such a configuration, the opposing end portions of the left and right shaft members can be firmly connected by a pair of connecting rods, and the bending rigidity of the center portion of the seat support shaft is increased.
In addition, since the attaching / detaching operation of the connecting means to both shaft members can be easily performed from the outside in a state in which the seat is flipped up, the working efficiency during assembly and disassembly of the seat support shaft is improved.

（３）上記(２)項において、左右の軸部材を非円形断面をなすものとし、各軸部材の外側端部を、側脚に回動不能として取付け、かつ連結杆における少なくとも軸部材への嵌合部を、軸部材の外形と補形をなす形状とする。 (3) In the above item (2), the left and right shaft members have a non-circular cross section, the outer ends of the shaft members are attached to the side legs so as not to rotate, and at least the shaft members of the connecting rods are connected to the shaft members. The fitting portion has a shape that complements the outer shape of the shaft member.

このような構成とすると、左右の軸部材の相対回転が確実に防止され、実質的に一体をなすねじり剛性の高い座支持軸とすることができる。   With such a configuration, the relative rotation of the left and right shaft members can be reliably prevented, and a seat support shaft that has substantially high torsional rigidity can be obtained.

（４）上記(３)項において、左右の軸部材に、座の下面と当接することにより、座を、使用位置と不使用位置とに停止させる二つのストッパ部を有する回動角度規制部材を固着する。 (4) In the above item (3), the rotation angle regulating member having two stopper portions for stopping the seat at the use position and the non-use position by contacting the left and right shaft members with the lower surface of the seat. Stick.

このような構成とすると、左右の軸部材を座に組付けるのと同時に、回動角度規制部材も組み付けられるので、別途、回動角度規制部材を組み付ける手間が省ける。
また、回動角度規制部材のストッパ部は、座の下面に当接するので、座側に、別途特別なストッパ部を設ける必要がない。 With such a configuration, since the rotation angle regulating member can be assembled at the same time when the left and right shaft members are assembled to the seat, the trouble of assembling the rotation angle regulating member can be saved separately.
Further, since the stopper portion of the rotation angle regulating member abuts on the lower surface of the seat, it is not necessary to provide a special stopper portion separately on the seat side.

（５）上記(１)〜(４)項のいずれかにおいて、軸部材の外側端部を、側脚の内側面に、座側から着脱しうるように取付ける。 (5) In any one of the above items (1) to (4), the outer end portion of the shaft member is attached to the inner side surface of the side leg so as to be detachable from the seat side.

このような構成とすると、側脚を床面等に固定したまま、軸部材を、側脚や座に組み付けたり、取り外したりすることができる。   With such a configuration, the shaft member can be attached to or removed from the side legs or the seat while the side legs are fixed to the floor surface or the like.

（６）上記(１)〜(５)項のいずれかにおいて、左右いずれか一方の軸部材に、座を上向きに付勢するねじりコイルばねを嵌合して装着する。 (6) In any one of the above items (1) to (5), a torsion coil spring that biases the seat upward is fitted and attached to either the left or right shaft member.

このような構成とすると、ねじりコイルばねを装着する部材を別途設ける必要がないだけでなく、組付けや取外しが容易な軸部材にねじりコイルばねを装着しているので、その組付作業はもとより、交換等のメンテナンス作業を極めて容易に行うことができる。   With such a configuration, it is not necessary to separately provide a member for mounting the torsion coil spring, and the torsion coil spring is mounted on a shaft member that is easy to assemble and remove. Maintenance work such as replacement can be performed very easily.

本発明によれば、座支持軸は、左右１対の軸部材と、それらの対向端部同士を連結する連結部材とにより、分割構造とされ、かつ両軸部材の対向端間には、軸部材の外側端部を座の側端部より抜き外し可能な隙間が設けられているので、従来の長寸をなす座支持軸に比して、座への組付けや取外し作業、及び軸部材に装着される部材のメンテナンス作業等を容易に行うことができる。   According to the present invention, the seat support shaft is divided by the pair of left and right shaft members and the connecting member that connects the opposed end portions, and the shaft between the opposed ends of both shaft members is a shaft. Since there is a gap that allows the outer end of the member to be removed from the side end of the seat, it can be assembled to and removed from the seat, and the shaft member, compared to a conventional seat support shaft that is long. Maintenance work and the like of the member to be mounted on can be easily performed.

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、劇場等で使用される本発明の座跳ね上げ式椅子の一実施形態の斜視図、図２は、同じく一部を切り欠いた正面図で、同形の３脚の座跳ね上げ式椅子１(以下、椅子と略称する)を、互いに左右方向に連結して構成されている。すなわち、各椅子１は、床面にアンカーボルトにより固定可能な互いに隣接する左右１対の側脚２、２と、それらの間に設けられた跳ね上げ可能な座３と、背凭れ４とからなっている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of an embodiment of a flip-up chair according to the present invention used in a theater or the like, and FIG. 2 is a front view of the same shape with a part cut away. A chair 1 (hereinafter abbreviated as a chair) is connected to each other in the left-right direction. That is, each chair 1 includes a pair of left and right side legs 2 and 2 adjacent to each other that can be fixed to the floor with anchor bolts, a seat 3 that can be flipped up between them, and a backrest 4. It has become.

座３は、図３の底面図、及び図３のVI-VI線縦断側面図に示すように(底面のカバー材を取外して示す)、底面視方形をなすように折曲された前後左右(図３の紙面上方が前)４枚の枠板５よりなり、かつ各枠板５上下両端に、短寸の内向きの折曲片５a、５bが形成された、上下両面が大きく開口する方形の座枠６を備え、図１及び図２に示すように、座枠６の下面の開口部は、その下面に取付けられたカバー材７により閉塞されている。座枠６における上側の前後の折曲片５a、５aには、座枠６の上面に装着されたクッション体８用の座スプリング９が複数取付けられている。   As shown in the bottom view of FIG. 3 and the vertical cross-sectional side view taken along the line VI-VI of FIG. 3 (shown with the cover material on the bottom removed), the seat 3 is folded back and forth and left and right ( The upper side of the paper in FIG. 3 is a square having four frame plates 5 and short inwardly bent pieces 5a and 5b formed on the upper and lower ends of each frame plate 5 and having large openings on both upper and lower sides. 1 and 2, the opening on the lower surface of the seat frame 6 is closed by a cover member 7 attached to the lower surface. A plurality of seat springs 9 for the cushion body 8 mounted on the upper surface of the seat frame 6 are attached to the front and rear bent pieces 5 a and 5 a of the seat frame 6.

座枠６の後端部には、左右方向を向く座支持軸１０が、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、座支持軸１０は、四角形断面の角管よりなる左右１対の軸部材１０a、１０aの対向端部同士を、上下１対の側面視下向き及び上向きコ字状の連結杆１１、１１により挟持して互いに連結することにより、分割構造とされている。なお、両連結杆１１は、軸部材１０aにがたなく外嵌しうるように、その外形と補形をなすコ字状断面とされている。 A seat support shaft 10 facing in the left-right direction is attached to the rear end portion of the seat frame 6 as follows.
As shown in FIGS. 3 to 6, the seat support shaft 10 has a pair of left and right shaft members 10 a, 10 a made of square tubes having a square cross section, and the opposite ends of the pair of left and right shafts facing downward and upward in a pair of side views. A split structure is formed by sandwiching and connecting to each other by means of the connecting rods 11, 11. Both connecting rods 11 have a U-shaped cross-section that is complementary to the outer shape of the connecting rod 11 so that the shaft member 10a can be fitted outside.

上下の連結杆１１、１１の両端部と、左右の軸部材１０a、１０aの対向端部とには、それぞれ左右２個ずつの上下方向を向く連結孔１２、１２が、互いに整合するようにして穿設され、上側の連結杆１１の両端部上面には、それに穿設した連結孔１２と同心をなす４個のナット１３が溶接されている。   Two right and left connecting holes 12 and 12 facing in the vertical direction are aligned with both ends of the upper and lower connecting rods 11 and 11 and the opposite ends of the left and right shaft members 10a and 10a, respectively. Four nuts 13 that are concentric with the connection hole 12 formed in the upper end of both ends of the upper connection rod 11 are welded.

左右の軸部材１０a、１０a同士を所要寸法離間させた状態で、それらの対向端部に、上下の連結杆１１、１１を、各連結孔１２同士が上下に整合するようにして嵌合したのち、下部の連結杆１１における連結孔１２の下方より挿入した固定ボルト１４を、両軸部材１０aの連結孔１２を貫通させて、上側の連結杆１１のナット１３に螺合することにより、左右の軸部材１０a同士が、相対回転不能、かつ分離可能として互いに連結され、かつこの連結により、実質的に一体をなすねじり剛性の高い座支持軸１０が形成される。なお、上記上下１対の連結杆１１、複数のナット１３、及び複数の固定ボルト１４により、連結手段が構成されている。   After the left and right shaft members 10a and 10a are spaced apart from each other by the required dimensions, the upper and lower connecting rods 11 and 11 are fitted to their opposite ends so that the connecting holes 12 are aligned vertically. The fixing bolt 14 inserted from below the connecting hole 12 in the lower connecting rod 11 is passed through the connecting holes 12 of both shaft members 10a and screwed into the nut 13 of the upper connecting rod 11, thereby The shaft members 10a are connected to each other so that they cannot rotate relative to each other and are separable, and this connection forms a seat support shaft 10 that is substantially united and has high torsional rigidity. The pair of upper and lower connecting rods 11, the plurality of nuts 13, and the plurality of fixing bolts 14 constitute a connecting means.

座枠６における左右の折曲片５a、５b間の後半部には、前後方向を向く上片１５aと、その両側縁より垂下する長寸の下向片１５b及び短寸の下向片１５cとよりなる正面視下向きコ字状の補強部材１５、１５が、上片１５aを上側の折曲片５aの下面に当接させて、外方の長寸の下向片１５bの前後２箇所が、左右の枠板５の内面にボルト１６とナット１７により固定されている。
左右の補強部材１５における上片１５aと外方の長寸の下向片１５bの前縁には、内向きの補強板１８が折曲形成され、両補強板１８は、後側の枠板５の内面に溶接されている。 In the rear half of the seat frame 6 between the left and right bent pieces 5a and 5b, there are an upper piece 15a facing in the front-rear direction, a long downward piece 15b and a short downward piece 15c hanging from both side edges. The upper U-shaped reinforcing members 15, 15 that are formed in a front view are made to abut the upper piece 15 a against the lower surface of the upper folded piece 5 a, and two front and rear portions of the outer long downward piece 15 b are The inner surfaces of the left and right frame plates 5 are fixed by bolts 16 and nuts 17.
An inward reinforcing plate 18 is bent at the front edges of the upper piece 15a and the outer long downward piece 15b in the left and right reinforcing members 15, and both the reinforcing plates 18 are formed on the rear frame plate 5. It is welded to the inner surface.

図５に示すように、左右の軸部材１０a、１０aにおける外側端部の上面と後面には、鉄板を下向きコ字状に折曲して形成された座３の回動角度規制部材１９の両側片１９a、１９aの後部下縁が溶接されている。回動角度規制部材１９の上端面は、上記補強部材１５の上片１５aの下面に当接することにより、座３を、ほぼ水平の使用位置である下限の回動位置で停止させる下限ストッパ部２０とされ、また、内方の長寸とした側片１９aの後端は、補強部材の上片１５aの下面に当接することにより、座３を、斜前上方を向く不使用位置である上限の回動位置で停止させる上限ストッパ部２１とされている。   As shown in FIG. 5, both sides of the rotation angle regulating member 19 of the seat 3 formed by bending an iron plate downwardly in a U-shape on the upper and rear surfaces of the outer end portions of the left and right shaft members 10a, 10a. The lower rear edges of the pieces 19a, 19a are welded. The lower end stopper portion 20 that stops the seat 3 at the lower limit rotation position that is a substantially horizontal use position by the upper end surface of the rotation angle regulating member 19 coming into contact with the lower surface of the upper piece 15a of the reinforcing member 15. In addition, the rear end of the side piece 19a having an inwardly long side is in contact with the lower surface of the upper piece 15a of the reinforcing member, so that the seat 3 is positioned at an upper limit that is an unused position facing obliquely upward. The upper limit stopper portion 21 is stopped at the rotation position.

右方(図３の底面視において左方)の軸部材１０aには、座３を上向きに付勢するねじりコイルばね２２が遊嵌され、その一方に足片２２aは、回動角度規制部材１９の左右の側片１９aにおける軸部材１０aの直上に穿設された係止孔２３、２３に、内方より嵌合されている。ねじりコイルばね２２の他方の足片２２bは、そのばね力調整用の後記するばね力調整部材４０に係止されている。   A torsion coil spring 22 that urges the seat 3 upward is loosely fitted to the shaft member 10a on the right side (left side in the bottom view in FIG. 3), and the foot piece 22a is connected to the rotation angle regulating member 19 on one side thereof. The left and right side pieces 19a are fitted into locking holes 23, 23 formed directly above the shaft member 10a from the inside. The other leg piece 22b of the torsion coil spring 22 is locked to a spring force adjusting member 40 described later for adjusting the spring force.

左右の軸部材１０a、１０aの外側端部には、段付きブッシュ２４、２４が圧嵌され、両段付きブッシュ２４の小径部２４aは、図３に示すように、座枠６の左右の枠板５と、それに固着した補強部材１５の外方の下向片１５bの後部に穿設した支持孔２５に、内方より回動可能に嵌合されている。なお、左右の軸部材１０a、１０aに固着された回動角度規制部材１９、１９は、左右の補強部材１５、１５の上片１５aの直下に位置するようになっている。   Stepped bushes 24, 24 are press-fitted to the outer end portions of the left and right shaft members 10a, 10a, and the small diameter portions 24a of both stepped bushes 24 are shown in FIG. The plate 5 and a support hole 25 drilled in the rear portion of the outward downward piece 15b of the reinforcing member 15 fixed to the plate 5 are fitted so as to be rotatable from the inside. The rotation angle restricting members 19, 19 fixed to the left and right shaft members 10a, 10a are positioned directly below the upper pieces 15a of the left and right reinforcing members 15, 15.

左右の軸部材１０a、１０aの対向端間には、それらの外側端部を、段付きブッシュ２４と共に座枠６の枠板５と補強部材１５の下向片１５bより内方に抜き外し可能な隙間Ｓが形成されている。   Between the opposite ends of the left and right shaft members 10a, 10a, their outer end portions can be removed inwardly from the frame plate 5 of the seat frame 6 and the downward pieces 15b of the reinforcing member 15 together with the stepped bush 24. A gap S is formed.

このようにして、左右の軸部材１０a、１０aの段付きブッシュ２４を座枠６の両側端に嵌合したのち、それらの対向端部を、上述のようにして、上下の連結杆１１、１１により連結することにより、実質的に一体の座支持軸１０が構成され、座３は、左右の段付きブッシュ２４まわりに回動しうるようにして、座支持軸１０により支持される。   Thus, after fitting the stepped bushes 24 of the left and right shaft members 10a, 10a to both side ends of the seat frame 6, the opposing end portions thereof are connected to the upper and lower connecting rods 11, 11 as described above. As a result, the seat support shaft 10 is substantially integrated, and the seat 3 is supported by the seat support shaft 10 so as to be rotatable around the left and right stepped bushes 24.

図７〜図９に示すように、左右の軸部材１０a、１０aにおける座枠６よりの突出端部は、互いに隣接する側脚２に、次のようにして固定されている。なお、両軸部材１０aの固定構造は、左右対称であるため、一方のみ説明する。
側脚２における前部側の上下方向の中央部内面には、膨出部２６が内向きに突設され、この膨出部２６には、軸部材１０aの側端部を回動不能に支持可能な内方に開口する側面視上向きコ字状の支持溝２７と、この支持溝２７の上方に連続して形成された後方に開口する、固定部材２８の挿入溝２９とが形成され、挿入溝２９の上面は、斜め前下方を向く傾斜面３０とされている。挿入溝２９における後方に開口する開口部の上下寸法は、軸部材１０aの上下寸法よりも大とされ、軸部材１０aを後方より余裕をもって挿入しうるようにしてある。
なお、図示は省略するが、互いに隣接する椅子１の対向端部同士を支持している中間部の側脚２には、その両側面に、上記と同様の支持溝２７と挿入溝２９を有する膨出部２６が形成されている。 As shown in FIGS. 7-9, the protrusion edge part from the seat frame 6 in the shaft members 10a and 10a on either side is being fixed to the side leg 2 adjacent to each other as follows. In addition, since the fixing structure of both the shaft members 10a is left-right symmetric, only one side is demonstrated.
A bulging portion 26 protrudes inwardly from the inner surface of the front leg of the side leg 2 in the vertical direction, and the bulging portion 26 supports the side end portion of the shaft member 10a so as not to rotate. A support groove 27 that is U-shaped when viewed from the side and that opens inward, and an insertion groove 29 of the fixing member 28 that is continuously formed above the support groove 27 and that opens to the rear are formed. The upper surface of the groove 29 is an inclined surface 30 that faces diagonally forward and downward. The vertical dimension of the opening that opens rearward in the insertion groove 29 is larger than the vertical dimension of the shaft member 10a, so that the shaft member 10a can be inserted with sufficient margin from the rear.
In addition, although illustration is abbreviate | omitted, the side leg 2 of the intermediate part which supports the opposing edge parts of the mutually adjacent chair 1 has the support groove | channel 27 and the insertion groove | channel 29 which are the same as the above on the both sides | surfaces. A bulging portion 26 is formed.

図１０及び図１１に拡大して示すように、固定部材２８は、上記挿入溝２９に後方より挿入可能な上下寸法とされ、かつ上面には、上記傾斜面３０と同じ傾斜角度の傾斜面３１が形成されている。固定部材２８における側脚２と対向する内側面には、凹部３２が形成され、この凹部３２の奥面に形成された、内側方に開口する方形溝３３には、前後方向のめねじ孔３４を有するナット状部材３５が嵌合されている。固定部材２８の中央部には、前後方向を向く挿通孔３６が、ナット状部材３５のめねじ孔３４と同軸をなすようにして貫設されている。   As shown in enlarged views in FIGS. 10 and 11, the fixing member 28 has a vertical dimension that can be inserted into the insertion groove 29 from the rear, and an inclined surface 31 having the same inclination angle as the inclined surface 30 on the upper surface. Is formed. A concave portion 32 is formed on the inner side surface of the fixing member 28 facing the side leg 2, and an internal thread hole 34 in the front-rear direction is formed in a rectangular groove 33 formed on the inner surface of the concave portion 32 and opening inward. A nut-like member 35 having the above is fitted. An insertion hole 36 facing in the front-rear direction is provided in the center of the fixing member 28 so as to be coaxial with the female screw hole 34 of the nut-like member 35.

軸部材１０aを側脚２に固定するには、軸部材１０a同士を連結杆１１により連結する前において、その軸端部を、膨出部２６の支持溝２７に内方より嵌合して支持したのち、支持溝２７の上方の挿入溝２９に、後方より固定部材２８を挿入し、上面の傾斜面３１を挿入溝２９の傾斜面３０に当接させるとともに、下面を軸部材１０aの上面に当接させる。   In order to fix the shaft member 10 a to the side leg 2, before connecting the shaft members 10 a to each other by the connecting rod 11, the shaft end portion is fitted into the support groove 27 of the bulging portion 26 from the inside and supported. After that, the fixing member 28 is inserted into the insertion groove 29 above the support groove 27 from the rear, the upper inclined surface 31 is brought into contact with the inclined surface 30 of the insertion groove 29, and the lower surface is brought into contact with the upper surface of the shaft member 10a. Make contact.

ついで、膨出部２６の前面に形成された大径の凹孔３７と、その奥面に穿設された前後方向を向くボルト挿通孔３８とに前方より挿入した固定ボルト３９を、固定部材２８の挿通孔３６に挿通して、ナット状部材３５のめねじ孔３４に螺合させ、強く締め付ける。すると、挿入溝２９の上面の傾斜面３０と、固定部材２８の上面の傾斜面３１との楔作用により、軸部材１０aの上面が固定部材２８により下方に強圧され、軸部材１０aの側端部が側脚２の内面に回動不能に強固に固定される。
固定ボルト３９を緩めれば、軸部材１０aの外端部を、側脚２の支持溝２７より内方に抜き外すことができる。
なお、左右の軸部材１０a同士を連結杆１１により連結したのち、両軸部材１０aの外側端部を、左右の側脚２の挿入溝２９の後方より挿入して、支持溝２７に落とし込み、後方より固定部材２８を挿入溝２９に挿入することにより、両軸部材１０aを側脚２に固定するようにしてもよい。 Next, a fixing bolt 39 inserted from the front into a large-diameter concave hole 37 formed in the front surface of the bulging portion 26 and a bolt insertion hole 38 drilled in the back surface thereof facing in the front-rear direction is fixed to the fixing member 28. Is inserted into the insertion hole 36 and screwed into the female screw hole 34 of the nut-like member 35, and tightened strongly. Then, due to the wedge action of the inclined surface 30 on the upper surface of the insertion groove 29 and the inclined surface 31 on the upper surface of the fixing member 28, the upper surface of the shaft member 10a is strongly pressed downward by the fixing member 28, and the side end portion of the shaft member 10a Is firmly fixed to the inner surface of the side leg 2 so as not to rotate.
If the fixing bolt 39 is loosened, the outer end portion of the shaft member 10a can be pulled out inward from the support groove 27 of the side leg 2.
After the left and right shaft members 10a are connected to each other by the connecting rod 11, the outer ends of both shaft members 10a are inserted from the rear of the insertion grooves 29 of the left and right side legs 2 and dropped into the support grooves 27. The shaft members 10 a may be fixed to the side legs 2 by inserting the fixing members 28 into the insertion grooves 29.

上記実施形態のように、座支持軸１０を、左右１対の軸部材１０a、１０aの対向端部同士を連結杆１１により連結した分割構造のものとし、かつ両軸部材１０aの対向端間に、それらの外側端部を座枠６より抜き外し可能な隙間Ｓを設け、さらに、両軸部材１０aの外端部を、側脚２の内側面に、内方に抜き外し可能に固定すると、座３を跳ね上げた状態で、連結杆１１を取外すことにより、左右の側脚２を床面に固定したまま、左右の軸部材１０aのみを座３より容易に取り外すことができるだけでなく、座３自体も、左右の側脚２より簡単に取り外すことができる。   As in the above embodiment, the seat support shaft 10 has a split structure in which the opposing ends of the pair of left and right shaft members 10a, 10a are connected by the connecting rod 11, and between the opposing ends of both shaft members 10a. When the outer end portions of the shaft members 10a are fixed to the inner side surfaces of the side legs 2 so that the outer end portions can be removed from the seat frame 6, the outer end portions are fixed to the inner side surfaces of the side legs 2. By removing the connecting rod 11 with the seat 3 flipped up, not only the left and right shaft members 10a can be easily removed from the seat 3 while the left and right side legs 2 are fixed to the floor surface, 3 itself can also be easily removed from the left and right side legs 2.

従って、軸部材１０aの座枠６及び側脚２への組付作業はもとより、軸部材１０aへのねじりコイルばね２２や段付きブッシュ２４等の組付作業または交換等のメンテナンス作業などを容易に行うことができる。なお、上記実施形態では、左右の軸部材１０aを角管よりなるものとしたが、四角形以上の多角形断面をなすものとしてもよい。この際には、軸部材１０aの外形に合わせて、側脚２の膨出部２６に設けた支持溝２７の形状を変更すればよい。   Accordingly, not only the work of assembling the shaft member 10a to the seat frame 6 and the side legs 2, but also the work of assembling or replacing the torsion coil spring 22 and the stepped bush 24 to the shaft member 10a can be easily performed. It can be carried out. In the above-described embodiment, the left and right shaft members 10a are made of square tubes, but may have a polygonal cross section of a quadrangle or more. At this time, the shape of the support groove 27 provided in the bulging portion 26 of the side leg 2 may be changed in accordance with the outer shape of the shaft member 10a.

また、軸部材１０aにおける側脚２に固定される外側端部のみを、上記の形状とし、他の部分は円形断面等としてもよい。   Further, only the outer end portion fixed to the side leg 2 in the shaft member 10a may have the above shape, and the other portion may have a circular cross section or the like.

さらに、軸部材１０aにおける側脚２に固定される外側端部の上面、すなわち、固定部材２８により押圧される上面のみが平面をなす非円形断面としてもよい。この際にも、軸部材１０aの外側端部の外形に合わせて、側脚２の支持溝２７の形状を変更すればよい。   Furthermore, the upper surface of the outer end portion fixed to the side leg 2 in the shaft member 10a, that is, only the upper surface pressed by the fixing member 28 may be a non-circular cross section having a flat surface. Also at this time, the shape of the support groove 27 of the side leg 2 may be changed in accordance with the outer shape of the outer end portion of the shaft member 10a.

図３及びそのXII-XII線に沿う断面図である図１２に示すように、座支持軸１０と、座枠６における後部の枠板５の側端部との間には、上記ねじりコイルばね２２のばね力を調整する硬質合成樹脂製のばね力調整部材４０が、次のようにして設けられている。   As shown in FIG. 3 and FIG. 12, which is a sectional view taken along the line XII-XII, the torsion coil spring is interposed between the seat support shaft 10 and the side end portion of the rear frame plate 5 in the seat frame 6. The spring force adjusting member 40 made of hard synthetic resin for adjusting the spring force of 22 is provided as follows.

ばね力調整部材４０は、外周面に、回転中心からの寸法が、側面視反時計まわりの円周方向に段階的に大となるように偏心させた４つの平坦面をなすカム面４１〜４４を有する非円形断面のカムをなし、外周面の中央部には、ねじりコイルばね２２の足片２２bを係止する凹溝４０aが形成されている。   The spring force adjusting member 40 has cam surfaces 41 to 44 that form four flat surfaces on the outer peripheral surface that are eccentric so that the dimension from the center of rotation is increased stepwise in the circumferential direction counterclockwise as viewed from the side. A concave groove 40a for locking the foot piece 22b of the torsion coil spring 22 is formed in the central portion of the outer peripheral surface.

ばね力調整部材４０には、回動操作軸４５における内側端部に形成された角軸部４５aが、相対回転不能に圧嵌され、回動操作軸４５におけるばね力調整部材４０より内方に突出する軸端部は、後部の枠板５の内面の補強板１８に溶接されたＬ字状のブラケット４６により、回動可能に支持されている。４７は、ブラケット４６の内方の軸端部に嵌合された平ワッシャ、４８は、平ワッシャ４７の抜け止めピンである。   In the spring force adjusting member 40, a square shaft portion 45 a formed at the inner end of the rotation operation shaft 45 is press-fitted so as not to be relatively rotatable, and is inward from the spring force adjustment member 40 in the rotation operation shaft 45. The protruding shaft end portion is rotatably supported by an L-shaped bracket 46 welded to the reinforcing plate 18 on the inner surface of the rear frame plate 5. 47 is a flat washer fitted to the inner shaft end of the bracket 46, and 48 is a retaining pin for the flat washer 47.

回動操作軸４５の外側端部は、側方の枠板５と、それに固定された補強部材１５における外方の下向片１５bとに穿設した軸孔４９、４９に挿通されて、回動可能に支持されている。
回動操作軸４５における座枠６の外側方に突出する突出端部は、回動操作用の角軸部４５bとなっており、この角軸部４５bの端部を、図１６に示すように、座３の側端面より若干突出させておくことにより、側脚２と座３との間の隙間より挿入した工具を用いて、回動操作軸４５及びそれに圧嵌したばね力調整部材４０を、外部より容易に回動操作しうるようにしてある。 The outer end portion of the rotation operation shaft 45 is inserted into shaft holes 49 and 49 formed in the side frame plate 5 and the outward downward piece 15b of the reinforcing member 15 fixed to the side frame plate 5 so as to rotate. It is supported movably.
The projecting end portion of the rotation operation shaft 45 that protrudes outward from the seat frame 6 is a corner shaft portion 45b for the rotation operation, and the end portion of the corner shaft portion 45b is as shown in FIG. By slightly projecting from the side end surface of the seat 3, the rotating operation shaft 45 and the spring force adjusting member 40 press-fitted thereto are used by using a tool inserted through a gap between the side leg 2 and the seat 3. It can be easily rotated from the outside.

図１２に示すように、ねじりコイルばね２２の足片２２bは、ばね力調整部材４０のカム面４１に、初期ばね力を付与した状態で、円周方向に比較的長く接触するように係止され、これにより座３は、常時上向きに付勢されている。この状態から、ばね力調整部材４０を側面視時計方向に回動させ、図１３〜図１５に示すように、その回転中心からの寸法を段階的に大としたカム面４２、４３、４４により足片２２bを押圧することにより、ねじりコイルばね２２のばね力が段階的に大となり、ねじりコイルばね２２にへたりが生じた際などに、座３の上向き付勢力を正常に調整したり、座３の跳上がり速さを調整したりすることができる。   As shown in FIG. 12, the foot piece 22b of the torsion coil spring 22 is locked so as to contact the cam surface 41 of the spring force adjusting member 40 relatively long in the circumferential direction in a state where an initial spring force is applied. Thus, the seat 3 is always urged upward. From this state, the spring force adjusting member 40 is rotated clockwise as viewed from the side, and as shown in FIGS. By pressing the foot piece 22b, the spring force of the torsion coil spring 22 increases stepwise, and when the torsion coil spring 22 sags, the upward biasing force of the seat 3 is adjusted normally, The jumping speed of the seat 3 can be adjusted.

図３及び図１７に示すように、座枠６におけるねじりコイルばね２２と反対側の側端部内には、座３を緩やかに跳ね上げるダンパー機構５０が設けられている。
このダンパー機構５０は、公知（FUJI SEIKI製)の油圧シリンダ式のダンパー５１と、左右２個のリンクアーム５２、５２とを備えている As shown in FIGS. 3 and 17, a damper mechanism 50 is provided in the side end of the seat frame 6 opposite to the torsion coil spring 22 so as to gently spring up the seat 3.
The damper mechanism 50 includes a known hydraulic cylinder type damper 51 (manufactured by FUJI SEIKI) and two link arms 52 and 52 on the left and right.

ダンパー５１は、合成樹脂製の左右１対のホルダ５３、５３の対向面の凹部内に、ピストンロッド５１aを後向きに突出した状態で収容され、この両ホルダ５３を、補強部材１５の下向片１５aの内面に溶接されたブラケット５４における前後方向を向く左右１対の取付片５４a、５４a間に挟入し、両側面から止めねじ５５により固定することにより、ダンパー５１は、そのピストンロッド５０aの後端が、軸部材１０aの直前に位置するようにして、ほぼ水平に設けられている。   The damper 51 is accommodated in a concave portion on the opposing surface of the pair of left and right holders 53, 53 made of synthetic resin, with the piston rod 51a projecting rearward. The damper 51 is attached to the piston rod 50a by being sandwiched between a pair of left and right mounting pieces 54a, 54a facing the front-rear direction in the bracket 54 welded to the inner surface of 15a, and fixed with set screws 55 from both sides. The rear end is provided substantially horizontally such that it is positioned immediately before the shaft member 10a.

リンクアーム５２、５２は、図５にも示すように、軸部材１０aを上方より跨ぎうるように、側面形が概ね下向きコ字状に形成され、それらの後端下部は、一方の軸部材１０aの後面に溶接された後面視上向きコ字状の枢支部材５６に、上下方向に回動可能に枢着されている。すなわち、両リンクアーム５２の後端下部を、枢支部材５６の両上向片５６a、５６a間に、スペーサ５７を介して挟入したのち、両リンクアーム５２とスペーサ５７に設けた左右方向を向く通孔５８に、一方の上向片５６aに穿設された軸孔５９より挿入したピン６０を挿通し、ピン６０の先端部のおねじ部を、他方の上向片５６aに設けためねじ孔６１に螺合することにより、左右のリンクアーム５２、５２の後端下部は、軸部材１０aを跨いで、その後面側に枢着されている。   As shown in FIG. 5, the link arms 52, 52 are formed in a substantially downward U-shape so that the shaft member 10 a can be straddled from above, and the lower rear end of each of the link arms 52, 52 is one shaft member 10 a. It is pivotally attached to a pivotal support member 56 that is welded to the rear surface and is U-shaped upward in the rear view so as to be rotatable in the vertical direction. That is, after the lower ends of the link arms 52 are inserted between the upper pieces 56a and 56a of the pivot member 56 via the spacers 57, the left and right directions provided on the link arms 52 and the spacers 57 are The pin 60 inserted from the shaft hole 59 drilled in one upward piece 56a is inserted into the through hole 58 facing, and a screw is provided so that the male thread portion of the tip of the pin 60 is provided in the other upward piece 56a. By screwing into the hole 61, the rear end lower portions of the left and right link arms 52, 52 are pivotally attached to the rear surface side across the shaft member 10a.

左右のリンクアーム５２、５２の前端下部は、次のようにして、ダンパー５１のピストンロッド５１aに連係されている。
両リンクアーム５２の前端下部と、それらの間に挟入したスペーサ６２とに設けた左右方向を向く通孔５８に、ピン６３を挿通するとともに、スペーサ６２の前面に形成された有底の凹部６４に、ピストンロッド５１aの後端部の大径部６５の後端部を嵌合することにより、両リンクアーム５２の前端下部は、ピストンロッド５１aの後端部に、ピン６３を介して、上下に回動可能に連係されている。
なお、このような連係形態に代えて、ピストンロッド５１aの後端にスペーサ６２を一体的に設け、ピストンロッド５１aの後端部を左右のリンクアーム５２、５２間の前端下部に、ピン６３により直接枢着してもよい。
ピン６３の両側端部は、ブラケット５４の両取付片５４aの後端部に形成された前後方向を向く長孔６６に、前後方向に摺動可能に嵌合されている。 The lower portions of the front ends of the left and right link arms 52, 52 are linked to the piston rod 51a of the damper 51 as follows.
A pin 63 is inserted into a left and right through hole 58 provided in a lower portion of the front end of both link arms 52 and a spacer 62 sandwiched between them, and a bottomed recess formed on the front surface of the spacer 62. 64, by fitting the rear end portion of the large-diameter portion 65 at the rear end portion of the piston rod 51a, the front end lower portions of both link arms 52 are connected to the rear end portion of the piston rod 51a via the pin 63, It is linked so that it can rotate up and down.
Instead of such a linkage form, a spacer 62 is integrally provided at the rear end of the piston rod 51a, and the rear end portion of the piston rod 51a is connected to the lower portion of the front end between the left and right link arms 52, 52 by a pin 63. You may pivot directly.
Both end portions of the pin 63 are fitted in a longitudinal hole 66 formed in the rear end portion of both mounting pieces 54a of the bracket 54 and facing in the front-rear direction so as to be slidable in the front-rear direction.

図１７に示すように、座３がほぼ水平の使用位置にあるときには、両リンクアーム５２は、軸部材１０aを跨いで前後方向を向き、かつダンパー５１のピストンロッド５１aは伸長している。この状態から、座３を跳ね上げると、図１８に示すように、リンクアーム５２が、後部側の枢着部を中心として、クッション体８側に回動させられ、ピストンロッド５１aとの枢着部が、軸部材１０aから離間する前方に徐々に変異することにより、ピストンロッド５１aは縮退させられ、ダンパー５１内のオイルがオリフィスより少しずつ排出されることにより、座３は緩やかに跳ね上がるようになる。   As shown in FIG. 17, when the seat 3 is in a substantially horizontal use position, both link arms 52 face in the front-rear direction across the shaft member 10a, and the piston rod 51a of the damper 51 extends. When the seat 3 is flipped up from this state, as shown in FIG. 18, the link arm 52 is pivoted toward the cushion body 8 around the pivotal portion on the rear side, and pivotally coupled to the piston rod 51a. The piston rod 51a is retracted by gradually changing the portion forward from the shaft member 10a, and the oil in the damper 51 is gradually discharged from the orifice, so that the seat 3 jumps up gently. Become.

このように、ダンパー５１をほぼ水平として座３に固定し、そのピストンロッド５１aの後端を、座支持軸１０の一部である軸部材１０aを跨ぐようにして、後端が軸部材１０aの後面側に枢着されたリンクアーム５２の前端に枢着すると、ダンパー５１と前後の枢着部が、軸部材１０aを挟んで概ね水平な直線上に並ぶので、ダンパー機構５０の上下寸法が小さくなり、その収容空間も小さくて済むので、座３の上下寸法を小とすることが可能となる。   In this way, the damper 51 is substantially horizontal and fixed to the seat 3, the rear end of the piston rod 51a straddles the shaft member 10a which is a part of the seat support shaft 10, and the rear end of the shaft member 10a. When pivotally attached to the front end of the link arm 52 pivotally attached to the rear side, the damper 51 and the front and rear pivot parts are arranged on a substantially horizontal straight line with the shaft member 10a interposed therebetween, so that the vertical dimension of the damper mechanism 50 is small. Thus, since the accommodation space can be small, the vertical dimension of the seat 3 can be reduced.

また、ピストンロッド５１aは、上向きに回動するリンクアーム５２を介して往復移動させられるので、ピストンロッド５１aのストロークが小さくなり、シリンダの全長の短い小型のダンパー５１を使用することができる。   Further, since the piston rod 51a is reciprocated through the link arm 52 that rotates upward, the stroke of the piston rod 51a is reduced, and a small damper 51 having a short overall length of the cylinder can be used.

さらに、小型のダンパー５１を、座支持軸１０に接近させうるので、ダンパー機構５０を、座支持軸１０に近接させてコンパクトに配置することができるとともに、座３の内部に前後方向の大きな収容空間を確保する必要もない。   Furthermore, since the small damper 51 can be brought close to the seat support shaft 10, the damper mechanism 50 can be arranged compactly close to the seat support shaft 10 and can be accommodated in the seat 3 in the front-rear direction. There is no need to secure space.

本発明の座跳ね上げ式椅子の一実施形態の斜視図である。It is a perspective view of one embodiment of the flip-up chair of the present invention. 同じく、一部切欠き正面図である。Similarly, it is a partially cutaway front view. 同じく、カバー材を取外した状態の座の拡大底面図である。Similarly, it is an enlarged bottom view of the seat with the cover member removed. 図３のIV-IV線拡大縦断側面図である。It is the IV-IV line expansion vertical side view of FIG. 座支持軸と、それに組み付けられる部材の分解斜視図である。It is a disassembled perspective view of a seat support shaft and a member assembled to it. 図３のVI-VI線拡大縦断側面図である。FIG. 4 is an enlarged vertical side view of the VI-VI line in FIG. 3. 側脚と、それへの軸部材固定前の分解斜視図である。It is a disassembled perspective view before a side leg and a shaft member fixation to it. 同じく、軸部材固定後の分解斜視図である。Similarly, it is an exploded perspective view after a shaft member fixation. 図８のIX-IX線拡大縦断側面図である。It is the IX-IX line expansion vertical side view of FIG. 固定部材の拡大側面図である。It is an enlarged side view of a fixing member. 図１０のXI-XI線縦断側面図である。It is the XI-XI line vertical side view of FIG. 図３のXII-XII線拡大縦断側面図である。It is the XII-XII line enlarged vertical side view of FIG. 同じく、ばね力調整部材を回動したときの図３と同部位の縦断側面図である。Similarly, it is a vertical side view of the same portion as FIG. 3 when the spring force adjusting member is rotated. 同じく、ばね力調整部材をさらに回動したときの図３と同部位の縦断側面図である。Similarly, it is a vertical side view of the same portion as FIG. 3 when the spring force adjusting member is further rotated. 同じく、ばね力調整部材をさらに回動したときの図３と同部位の縦断側面図である。Similarly, it is a vertical side view of the same portion as FIG. 3 when the spring force adjusting member is further rotated. 椅子の一方の側脚を取り外して示す斜視図である。It is a perspective view which removes and shows one side leg of a chair. 図３のXVII-XVII線拡大縦断側面図である。It is the XVII-XVII line enlarged vertical side view of FIG. 同じく、座を跳ね上げたときの図３と同部位の縦断側面図である。Similarly, it is a vertical side view of the same portion as FIG. 3 when the seat is flipped up.

符号の説明Explanation of symbols

１ 座跳ね上げ式椅子
２ 側脚
３ 座
４ 背凭れ
５ 枠板
５a 折曲片
５b 折曲片
６ 座枠
７ カバー材
８ クッション体
９ 座スプリング
１０ 座支持軸
１０a 軸部材
１１ 連結杆
１２ 連結孔
１３ ナット
１４ 固定ボルト
１５ 補強部材
１５a 上片
１５b 下向片
１５c 下向片
１６ ボルト
１７ ナット
１８ 補強板
１９ 回動角度規制部材
１９a 側片
２０ 下限ストッパ部
２１ 上限ストッパ部
２２ ねじりコイルばね
２２a 足片
２２b 足片
２３ 係止孔
２４ 段付きブッシュ
２４a 小径部
２５ 支持孔
２６ 膨出部
２７ 支持溝
２８ 固定部材
２９ 挿入溝
３０ 傾斜面
３１ 傾斜面
３２ 凹部
３３ 方形溝
３４ めねじ孔
３５ ナット状部材
３６ 挿通孔
３７ 凹孔
３８ ボルト挿通孔
３９ 固定ボルト
４０ ばね力調整部材
４０a 凹溝
４１ カム面
４２ カム面
４３ カム面
４４ カム面
４５ 回動操作軸
４５a 角軸部
４５b 角軸部
４６ ブラケット
４７ 平ワッシャ
４８ 抜け止めピン
４９ 軸孔
５０ ダンパー機構
５１ ダンパー
５１a ピストンロッド
５２ リンクアーム
５３ ホルダ
５４ ブラケット
５４a 取付片
５５ 止めねじ
５６ 枢支部材
５６a 上向片
５７ スペーサ
５８ 通孔
５９ 軸孔
６０ ピン
６１ めねじ孔
６２ スペーサ
６３ ピン
６４ 凹部
６５ 大径部
６６ 長孔
Ｓ 隙間 DESCRIPTION OF SYMBOLS 1 Seat raising type chair 2 Side leg 3 Seat 4 Backrest 5 Frame board 5a Bending piece 5b Bending piece 6 Seat frame 7 Cover material 8 Cushion body 9 Seat spring 10 Seat support shaft 10a Shaft member 11 Connecting rod 12 Connecting hole 13 Nut 14 Fixing bolt 15 Reinforcement member 15a Upper piece 15b Downward piece 15c Downward piece 16 Bolt 17 Nut 18 Reinforcement plate 19 Rotation angle restricting member 19a Side piece 20 Lower limit stopper part 21 Upper limit stopper part 22 Torsion coil spring 22a Foot piece 22b Foot piece 23 Locking hole 24 Stepped bush 24a Small diameter portion 25 Support hole 26 Swelling portion 27 Support groove 28 Fixing member 29 Insertion groove 30 Inclined surface 31 Inclined surface 32 Recessed portion 33 Square groove 34 Female screw hole 35 Nut-like member 36 Insertion hole 37 Concave hole 38 Bolt insertion hole 39 Fixing bolt 40 Spring force adjusting member 40a Concave groove 41 Cam surface 42 Cam surface 3 Cam surface 44 Cam surface 45 Rotating operation shaft 45a Square shaft portion 45b Square shaft portion 46 Bracket 47 Flat washer 48 Retaining pin 49 Shaft hole 50 Damper mechanism 51 Damper 51a Piston rod 52 Link arm 53 Holder 54 Bracket 54a Mounting piece 55 Set screw 56 Pivoting member 56a Upward piece 57 Spacer 58 Through hole 59 Shaft hole 60 Pin 61 Female screw hole 62 Spacer 63 Pin 64 Recessed part 65 Large diameter part 66 Long hole S Gap

Claims (6)

左右の側脚に外側端部が支持された左右方向を向く座支持軸により、両側脚間に配設した座を、ほぼ水平の使用位置と、上向きの不使用位置とに回動可能に支持してなる座跳ね上げ式椅子において、
前記座支持軸を、前記座の側端部を回動可能に支持し、かつ座の側方に突出する外側端部が前記側脚により支持された左右１対の軸部材と、両軸部材の対向端部同士を、それらの対向端間に、左右の軸部材の外側端部が座の側端部の支持部より内方に抜き外しうる隙間を設けて連結する連結手段とからなるものとしたことを特徴とする座跳ね上げ式椅子。 A seat support shaft that faces the left and right sides with the outer ends supported by the left and right side legs, and supports the seat arranged between both legs so that it can rotate between a substantially horizontal use position and an upward non-use position. In the flip-up chair,
A pair of left and right shaft members that support the seat support shaft so that the side end portions of the seat can rotate and the outer end portions projecting to the side of the seat are supported by the side legs; And connecting means for connecting the opposite end portions of the left and right shafts by providing a gap between the opposite ends so that the outer end portions of the left and right shaft members can be removed inwardly from the support portions of the side end portions of the seat. A flip-up chair that is characterized by that. 連結手段を、左右の軸部材の対向端部を跨ぐようにして外嵌された１対の連結杆と、左右の軸部材と前記連結杆同士を固定するボルトとナットとからなるものとした請求項１記載の座跳ね上げ式椅子。   The connecting means is composed of a pair of connecting rods externally fitted so as to straddle opposite ends of the left and right shaft members, and a bolt and a nut for fixing the left and right shaft members and the connecting rods to each other. Item 1. The flip-up chair according to item 1. 左右の軸部材を非円形断面をなすものとし、各軸部材の外側端部を、側脚に回動不能として取付け、かつ連結杆における少なくとも軸部材への嵌合部を、軸部材の外形と補形をなす形状としてなる請求項２記載の座跳ね上げ式椅子。   The left and right shaft members have a non-circular cross section, the outer end portions of the shaft members are attached to the side legs so as not to rotate, and at least the fitting portion of the connecting rod to the shaft member is defined as the outer shape of the shaft member. The flip-up chair according to claim 2, which has a complementary shape. 左右の軸部材に、座の下面と当接することにより、座を、使用位置と不使用位置とに停止させる二つのストッパ部を有する回動角度規制部材を固着してなる請求項３記載の座跳ね上げ式椅子。   4. A seat according to claim 3, wherein a pivot angle restricting member having two stopper portions for stopping the seat at the use position and the non-use position by abutting the lower surface of the seat on the left and right shaft members is fixed. A flip-up chair. 軸部材の外側端部を、側脚の内側面に、座側から着脱しうるように取付けてなる請求項１〜４のいずれかに記載の座跳ね上げ式椅子。   The seat-up type chair according to any one of claims 1 to 4, wherein the outer end portion of the shaft member is attached to the inner side surface of the side leg so as to be detachable from the seat side. 左右いずれか一方の軸部材に、座を上向きに付勢するねじりコイルばねを嵌合して装着してなる請求項１〜５のいずれかに記載の座跳ね上げ式椅子。
The seat-up type chair according to any one of claims 1 to 5, wherein a torsion coil spring that urges the seat upward is fitted and attached to either one of the left and right shaft members.

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