JP6045016B2 - Chair armrest equipment - Google Patents

Chair armrest equipment Download PDF

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Publication number
JP6045016B2
JP6045016B2 JP2012105236A JP2012105236A JP6045016B2 JP 6045016 B2 JP6045016 B2 JP 6045016B2 JP 2012105236 A JP2012105236 A JP 2012105236A JP 2012105236 A JP2012105236 A JP 2012105236A JP 6045016 B2 JP6045016 B2 JP 6045016B2
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armrest
holding member
substrate
guide
rear direction
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JP2013233166A (en
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洋一郎 小田
洋一郎 小田
アレキザンダー ハーフォード
アレキザンダー ハーフォード
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Okamura Corp
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Okamura Corp
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
    • A47C1/03—Reclining or easy chairs having independently-adjustable supporting parts the parts being arm-rests

Description

本発明は、肘掛け支柱の上端に設けた肘当ての位置を、椅子の使用者の体型や作業内容等により調節しうるようにした椅子の肘掛け装置に関する。   The present invention relates to an armrest device for a chair that can adjust the position of an arm rest provided on the upper end of an armrest strut according to the body shape, work content, etc. of the user of the chair.

椅子の使用者の体型等による腕の位置の違いや、パソコンのキーボードやマウス等を操作する際など、作業内容に応じて肘当ての位置を最適に調整しうるようにすることは、作業能率や疲労を改善する上において重要である。
このように、肘当ての位置を調整可能とした肘掛け装置は、種々提案されており、公知である(例えば特許文献１〜４参照)。 It is necessary to be able to adjust the position of the elbow rest according to the work contents, such as the difference in the arm position depending on the body shape of the chair user and the operation of the keyboard and mouse of the personal computer. It is important in improving fatigue.
As described above, various armrest devices that can adjust the position of the armrest have been proposed and are known (see, for example, Patent Documents 1 to 4).

特開２００８−１９４１２６号公報JP 2008-194126 A 特開２０１１−５０４７６号公報JP 2011-50476 A 米国特許第７，５５９，６０９号明細書US Pat. No. 7,559,609 米国特許第７，１５９，９４７号明細書US Pat. No. 7,159,947

特許文献１〜３に記載の肘掛け装置においては、肘掛け支柱と肘掛けとの間にカバー板や遮蔽板を設け、これらにより、肘掛け基板を支持しうるようにはなっているが、このカバー板等は、単に肘掛け基板に設けた開口部を塞ぐ目的で設けたものであり、肘掛け基板を直接ガイドする機能は有していないので、肘掛けをガイドして前後方向に安定よく移動させることはできない。
また、特許文献１および２に記載の肘掛け装置は、カバー板等の前後左右寸法が小さく、肘掛け基板に設けた開口部を閉塞しうる最小限の大きさであり、かつ肘掛け支柱に突設した上向突部の左右寸法及び肘掛け基板に設けられた、上向突部に摺動可能に嵌合される開口部の幅も比較的小さいので、肘掛け支柱により肘掛けを安定よく支持して移動させることができず、肘掛けを前後方向に大きく移動させてこれに肘を載せた際に、肘掛けが上下方向にぐらついたり、肘掛け支柱の上面に突設した上向突部に曲げ荷重が加わったりする恐れがある。 In the armrest devices described in Patent Documents 1 to 3, a cover plate and a shielding plate are provided between the armrest strut and the armrest so that the armrest substrate can be supported. Is provided only for the purpose of closing the opening provided in the armrest substrate, and does not have a function of directly guiding the armrest substrate. Therefore, the armrest cannot be guided and stably moved in the front-rear direction.
In addition, the armrest devices described in Patent Documents 1 and 2 are small in size, such as a cover plate, in the front-rear and left-right dimensions, have a minimum size that can block the opening provided in the armrest substrate, and project from the armrest struts. The left and right dimensions of the upward protrusion and the width of the opening provided on the armrest substrate that is slidably fitted to the upward protrusion are also relatively small, so that the armrest is supported and moved stably by the armrest support. When the armrest is moved greatly in the front-rear direction and the elbow is placed on the armrest, the armrest wobbles up and down, or a bending load is applied to the upward projection protruding from the upper surface of the armrest post. There is a fear.

特許文献４に記載の肘掛け装置は、肘掛けの下面が、前後左右寸法の小さなベースを介して、肘掛け支柱の上面により直接摺動可能に支持される構成となっているので、肘掛けを前後左右方向に移動させたり、回動させたりした際に、上記後者の問題と同様の問題が発生する恐れがある。   The armrest device described in Patent Document 4 is configured such that the lower surface of the armrest is supported so as to be directly slidable by the upper surface of the armrest column through a small base in the front / rear / left / right dimensions. There is a possibility that the same problem as the latter problem may occur when the lens is moved or rotated.

また、特許文献１〜４に記載されている肘掛け装置においては、いずれも、肘掛け支柱の上端より突設する狭幅の上向突部を、肘当て基板に設けた前後方向を向く狭幅な開口部に、前後方向に相対移動可能かつ相対回動可能として直接嵌合するか、または肘掛け基板を肘掛け支柱に保持する保持部材に設けた左右方向を向く狭幅な長孔に、左右方向に相対移動可能として直接嵌合することにより、肘掛けを、肘掛け支柱に対し移動させうるようになっているので、肘掛けを前後または左右方向に移動させたり、回動させたりする際の負荷が、上向突部と開口部または長孔との摺動部に、直接曲げ荷重となって加わることがある。
このようになると、肘掛けを長期間繰り返し移動させた際に、互いの摺動部が摩耗するなどして、肘掛けを円滑に移動させることができなくなる恐れがある。 In addition, in the armrest devices described in Patent Documents 1 to 4, the narrow upward projections projecting from the upper ends of the armrest struts are narrow and facing the front-rear direction provided on the elbow rest substrate. Fits directly into the opening so that it can move in the front-rear direction and can rotate in the front-rear direction, or into a narrow slot facing the left-right direction provided in the holding member that holds the armrest board on the armrest strut, in the left-right direction The armrest can be moved relative to the armrest strut by directly fitting it so that it can be moved relative to the armrest strut. A bending load may be directly applied to the sliding portion between the projecting portion and the opening or the long hole.
In this case, when the armrests are repeatedly moved for a long period of time, there is a possibility that the sliding portions may be worn and the armrests cannot be moved smoothly.

本発明は、上記問題点に鑑みてなされたもので、肘掛け支柱により、肘掛けを安定よく支持して前後左右方向に移動させうるとともに、肘掛けを移動させる際の負荷が、摺動部に直接加わりにくくして、肘掛けを長期間に亘り円滑に移動させうるようにし、さらに、肘掛けの上下寸法を可能な限り小さくしうるようにした椅子の肘掛け装置を提供することを目的としている。 The present invention has been made in view of the above problems, and the armrest can be stably supported and moved in the front-rear and left-right directions by the armrest strut, and a load when the armrest is moved is directly applied to the sliding portion. It is an object of the present invention to provide an armrest device for a chair which is made difficult, allows the armrest to move smoothly over a long period of time, and further reduces the vertical dimension of the armrest as much as possible.

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）本発明の肘掛け装置は、座の外側方より起立し、かつ上端部より下方に受支面を有する肘掛け支柱と、上面に突設した上向きのガイド突部に、上下に貫通し、かつ水平の左右方向に長い長孔が設けられ、この長孔に前記肘掛け支柱の上端部に設けられた上向突部を嵌合することにより、前記肘掛け支柱の受止面に、前記左右方向に相対移動可能として支持された肘掛け支持板と、上下に貫通し、かつ前記左右方向と交差する水平の前後方向に長い開口部が設けられ、この開口部に前記肘掛け支持板のガイド突部を嵌合することにより、前記肘掛け支持板の上面に、前記前後方向に相対移動可能、かつ相対回動不能として支持された肘掛け基板と、前記肘掛け支柱の前記上向突部に設けられ、かつ前記受止面との間に、前記肘掛け支持板を左右方向に、前記肘掛け基板を前後方向にそれぞれ移動可能かつ上方に移動不能として挟持する保持手段と、この保持手段と前記肘掛け基板の上面を覆うようにして、肘掛け基板に装着した肘当てとを備えるものとする。 According to the present invention, the above-mentioned problems are solved as follows.
(1) The armrest device of the present invention vertically penetrates an armrest strut standing from the outer side of the seat and having a receiving surface below the upper end portion, and an upward guide protrusion protruding from the upper surface, In addition, a long long hole is provided in the horizontal left and right direction, and by fitting an upward protrusion provided at the upper end of the armrest strut into the long hole, the receiving surface of the armrest strut is fitted with the left and right direction. and armrest support plate supported as a relatively movable in, penetrating in up and down, and said elongated opening in the longitudinal direction of the horizontal intersecting the lateral direction is provided, the guide protrusion of the armrest support plate to the opening By fitting, an armrest substrate supported on the upper surface of the armrest support plate so as to be relatively movable in the front-rear direction and not to be relatively rotatable, and provided on the upward projection of the armrest strut, and between the supporting surface, the armrest support plate In the lateral direction, and holding means for clamping the immovable said armrest substrate respectively movable and upwardly in the longitudinal direction, so as to cover the holding means top surface of the armrest substrate, and elbow mounted on the armrest board Shall be provided.

このような構成によると、肘掛け基板を、肘掛け支柱の上面により支持した肘掛け支持板と、上向突部の上端部に設けた保持手段とにより挟持するとともに、肘掛け支持板の上面に突設したガイド突部を、肘掛け基板に設けた前後方向に長い開口部に、相対移動可能に嵌合しているので、肘掛けを、肘掛け支持板を介して、肘掛け支柱の上面により安定よく支持しうるとともに、開口部に嵌合したガイド突部により肘掛け基板を直接ガイドしながら、肘掛けを前後方向に安定よく移動させることができる。
また、肘掛け支持板は、肘掛け基板と共に左右方向に移動するので、肘掛け支持板により肘掛け基板の下面が常に広く支持される。従って、肘掛けを左右方向に移動させた状態で肘を載せても、肘掛けが上下方向にぐらついたり、上向突部に曲げ荷重が加わったりする恐れが小さくなる。
さらに、肘掛け支柱の上向突部は、肘掛け支持板に突設したガイド突部を介して、肘掛け基板の開口部に間接的に嵌合されているので、肘掛け支柱に対し肘掛けを移動させた際の負荷が、上向突部と開口部との摺動部に直接加わることがなくなり、それらの接触面の摩耗が抑えられることにより、肘掛けを長期間に亘り円滑に移動させることができる。 According to such a configuration, the armrest substrate is sandwiched between the armrest support plate supported by the upper surface of the armrest strut and the holding means provided at the upper end portion of the upward projection, and is projected from the upper surface of the armrest support plate. Since the guide protrusion is fitted in an opening that is long in the front-rear direction provided on the armrest substrate so as to be relatively movable, the armrest can be stably supported by the upper surface of the armrest strut through the armrest support plate. The armrest can be stably moved in the front-rear direction while directly guiding the armrest substrate by the guide projection fitted into the opening.
Also, the armrest support plate, so you move in the lateral direction together with the armrest substrate, the lower surface of the armrest board is always widely supported by armrest support plate. Therefore, even if the elbow is placed with the armrest moved in the left-right direction, the possibility that the armrest wobbles in the vertical direction or a bending load is applied to the upward projection is reduced.
Furthermore, the upward protrusion of the armrest strut is indirectly fitted to the opening of the armrest substrate via the guide protrusion protruding from the armrest support plate, so that the armrest is moved relative to the armrest strut. The load at the time is not directly applied to the sliding portion between the upward projecting portion and the opening portion, and the wear of the contact surfaces is suppressed, so that the armrest can be moved smoothly over a long period of time.

（２）上記(１)項において、保持手段を、肘掛け基板の上面に設けた凹部内に、前後方向に相対移動可能として収容され、かつ肘掛け支柱の上向突部が左右方向に相対移動可能として挿通する嵌合孔が、ガイド突部の長孔と平行をなすように上下に重ねて設けられた下部保持部材と、この下部保持部材の上面に設けた凹部内に、左右方向に相対移動可能として収容され、かつ肘掛け支柱の上向突部が左右方向および前後方向に相対移動不能として挿通する嵌合孔が設けられた上部保持部材と、この上部保持部材の上面に設けた凹部内に収容され、かつ肘掛け支柱の上端に固着されることにより、肘掛け支持板、肘掛け基板、下部保持部材、及び上部保持部材を、肘掛け支柱の上向突部に対し抜け止めする固定部材とを備えるものとする。 (2) In the above item (1), the holding means is housed in a recess provided on the upper surface of the armrest substrate so as to be relatively movable in the front-rear direction, and the upward projection of the armrest strut is relatively movable in the left-right direction. The fitting hole to be inserted as a relative movement in the left-right direction within the lower holding member provided vertically and vertically so as to be parallel to the elongated hole of the guide protrusion and the recess provided on the upper surface of the lower holding member And an upper holding member provided with a fitting hole through which the upward projection of the armrest strut is inserted so as not to be relatively movable in the left-right direction and the front-rear direction, and a recess provided on the upper surface of the upper holding member. A fixing member that is housed and fixed to the upper end of the armrest strut to prevent the armrest support plate, the armrest substrate, the lower holding member, and the upper holding member from coming off from the upward projection of the armrest strut And

このような構成によると、保持手段を構成する部材を、肘掛け基板の上面の凹部内に、下位の部材から順に重ねるだけで、容易に装着しうるとともに、上位の部材を、下位の部材の凹部に収容してあるので、保持手段が上下複数の部材よりなるものとしても、保持手段の全体の高さを低く抑えることができる。その結果、肘掛け基板及び肘掛け全体の上下寸法を小としうるので、肘掛け基板や肘当て等を成形するための材料費が節約されるとともに、肘掛け装置の体裁がよくなる。
また、ガイド突部の長孔と下部保持部材との嵌合孔とが、互いに平行をなして上下に重ねられているので、肘掛け支柱の上端部の嵌合領域及び支持領域が上下方向に大となる。その結果、肘掛け支柱の上向突部に対し肘掛けを水平移動させる際に、これを、安定よく移動させることができるとともに、長孔や嵌合孔及び肘掛け支柱の上向突部の摩耗を抑えることができる。 According to such a configuration, the members constituting the holding means can be easily mounted by simply stacking the members constituting the holding means in the recesses on the upper surface of the armrest substrate in order from the lower members, and the upper members can be mounted on the recesses of the lower members. Therefore, even if the holding means is composed of a plurality of upper and lower members, the overall height of the holding means can be kept low. As a result, since the vertical dimension of the armrest substrate and the entire armrest can be made small, the material cost for molding the armrest substrate, the armrest, etc. is saved, and the appearance of the armrest device is improved.
In addition, since the long hole of the guide protrusion and the fitting hole of the lower holding member are stacked vertically in parallel with each other, the fitting area and the support area at the upper end of the armrest column are large in the vertical direction. It becomes. As a result, when the armrest is horizontally moved with respect to the upward projection of the armrest strut, it can be stably moved, and the wear of the long hole, the fitting hole and the upward projection of the armrest strut is suppressed. be able to.

（３）上記(２)項において、下部保持部材の凹部内に、左右方向を向くガイド片を、嵌合孔を挟んで対向するようにして設け、両ガイド片に、上部保持部材の両端に外向きに突設した下向き鉤形の１対の係合片を、左右方向に相対移動可能として上方より係合し、前記上部保持部材の両端面と前記係合片とにより各ガイド片を挟んで、前記上部保持部材が下部保持部材に対して左右方向に摺動しうるようにする。 (3) In the above (2), guide pieces facing in the left-right direction are provided in the recesses of the lower holding member so as to face each other with the fitting holes interposed therebetween, and both guide pieces are provided at both ends of the upper holding member. A pair of downwardly protruding hook-shaped engagement pieces projecting outward are engaged from above so that they can move relative to each other in the left-right direction, and each guide piece is sandwiched between both end faces of the upper holding member and the engagement pieces. Thus, the upper holding member can slide in the left-right direction with respect to the lower holding member.

このような構成によると、下部保持部材に対し上部保持部材を、左右方向に安定よく相対移動させうるので、肘掛けも左右方向に安定よく移動させることができる。
また、下部保持部材の凹部内において、ガイド片に係合片が上方より嵌合しているので、上部保持部材及び肘掛けの高さが高くなることはない。 According to such a configuration, the upper holding member can be stably moved relative to the lower holding member in the left-right direction, so that the armrest can also be moved stably in the left-right direction.
Further, since the engaging piece is fitted to the guide piece from above in the recess of the lower holding member, the height of the upper holding member and the armrest does not increase.

（４）上記(３)項において、係合片を、外方に弾性変形可能とし、この係合片を、ガイド片の外面に左右方向に沿って設けた複数の係合溝に、選択的に係合しうるようにする。 (4) In the above item (3), the engagement piece can be elastically deformed outward, and the engagement piece is selectively provided in a plurality of engagement grooves provided in the left-right direction on the outer surface of the guide piece. To be able to engage.

このような構成によると、上記(３)項に記載の効果に加えて、肘掛けを、左右方向に節度感をもって、かつ段階的に安定よく移動させることができる。 According to such a configuration, in addition to the effect described in the above item (3), the armrest can be moved in a stepwise and stable manner with a sense of moderation in the left-right direction.

（５）上記(２)〜(４)項のいずれかにおいて、肘掛け基板の凹部内に、前後方向を向く１対の被ガイド面を、開口部を挟んで互いに対向するようにして設けるとともに、この被ガイド面と対向する下部保持部材の両側部に、１対の被ガイド面を前後方向に相対移動可能にガイドするガイド部を設ける。 (5) In any one of the above items (2) to (4), a pair of guided surfaces facing in the front-rear direction are provided in the recesses of the armrest substrate so as to face each other with the opening interposed therebetween, Guide portions for guiding a pair of guided surfaces so as to be relatively movable in the front-rear direction are provided on both sides of the lower holding member facing the guided surface.

このような構成によると、肘掛けを前後方向に安定よく移動させうるとともに、肘掛け基板と下部保持部材との接触面積及び摺動抵抗が小さくなるので、肘掛けを前後方向に円滑に移動させることができる。
また、１対の被ガイド面は、肘掛け基板の凹部内に設けられ、この凹部内において被ガイド面をガイド部によりガイドするので、肘掛け基板と下部保持部材との高さが高くなることはない。 According to such a configuration, the armrest can be stably moved in the front-rear direction, and the contact area and sliding resistance between the armrest substrate and the lower holding member are reduced, so that the armrest can be smoothly moved in the front-rear direction. .
Further, the pair of guided surfaces are provided in the recesses of the armrest substrate, and the guided surfaces are guided by the guide portions in the recesses, so that the height of the armrest substrate and the lower holding member does not increase. .

（６）上記(５)項において、被ガイド面に、複数の係合溝を前後方向に沿って設け、かつガイド部の一部に、前記複数の係合溝に選択的に係合可能な弾性係合片を設ける。 (6) In the above item (5), a plurality of engagement grooves are provided on the guided surface along the front-rear direction, and a part of the guide portion can be selectively engaged with the plurality of engagement grooves. An elastic engagement piece is provided.

このような構成によると、上記(５)項に記載の効果に加えて、肘掛けを、前後方向に節度感をもって、かつ段階的に安定よく移動させることができる。しかも、係合溝を被ガイド面に、かつ弾性係合片をガイド部の一部に設けてあるので、肘掛け全体の高さを大とする必要がない。 According to such a configuration, in addition to the effect described in the above item (5), the armrest can be moved in a stepwise and stable manner with a sense of moderation in the front-rear direction. Moreover, since the engagement groove is provided on the guided surface and the elastic engagement piece is provided on a part of the guide portion, it is not necessary to increase the height of the entire armrest.

（７）上記(１)〜(６)項のいずれかにおいて、ガイド突部の両側面に、互いに平行をなす前後方向を向くガイド面を設け、両ガイド面を、肘掛け基板の開口部における互いに平行をなして対向する前後方向の被ガイド面に摺接させるようにする。 (7) In any one of the above items (1) to (6), guide surfaces facing in the front-rear direction that are parallel to each other are provided on both side surfaces of the guide protrusion, and both guide surfaces are connected to each other at the opening of the armrest substrate. It is slidably brought into contact with the guided surfaces in the front-rear direction facing in parallel.

このような構成によると、肘掛け支持板と肘掛け基板との相対回動を確実に防止しながら、肘掛け基板を直接ガイドして前後方向に円滑に移動させることができる。 According to such a configuration, the armrest substrate can be directly guided and smoothly moved in the front-rear direction while reliably preventing relative rotation between the armrest support plate and the armrest substrate.

（８）上記(１)〜(７)項のいずれかにおいて、肘掛け支持板の前後寸法を、肘掛け支柱の上面の前後方向の長さより大とするとともに、左右寸法を、肘掛け基板の左右幅とほぼ同等とする。 (8) In any one of the above items (1) to (7), the front-rear dimension of the armrest support plate is made larger than the length in the front-rear direction of the upper surface of the armrest strut, and the left-right dimension is defined as the left-right width of the armrest board. Almost the same.

このような構成によると、肘掛け支持板による肘掛け基板の支持面積が大となるので、肘掛けを、肘掛け支持板を介して、肘掛け支柱により、より安定よく支持することができる。   According to such a structure, since the support area of the armrest board | substrate by an armrest support plate becomes large, an armrest can be supported more stably by an armrest support | pillar via an armrest support plate.

本発明によれば、肘掛け支柱により、肘掛けを安定よく支持して前後左右方向に移動させうるとともに、肘掛けを移動させる際の負荷が、摺動部に直接加わりにくくなることにより、肘掛けを長期間に亘り円滑に移動させうるようにした椅子の肘掛け装置を提供することができる。 According to the present invention, the armrest can be stably supported and moved in the front-rear and left-right directions by the armrest struts, and the load when moving the armrest is less likely to be directly applied to the sliding portion. It is possible to provide an armrest device for a chair that can be moved smoothly over a wide range.

本発明の肘掛け装置を備える椅子の斜視図である。It is a perspective view of a chair provided with the armrest device of the present invention. 背凭れ支持杆の一部と肘掛け装置との分解斜視図である。It is a disassembled perspective view of a part of backrest support heel and an armrest device. 肘掛け装置における肘掛け支柱を、その中心軸線を含む垂直面で切断した拡大縦断側面図である。It is the expansion vertical side view which cut | disconnected the armrest support | pillar in the armrest apparatus by the vertical surface containing the center axis line. 図３のIV−IV線断面図である。It is the IV-IV sectional view taken on the line of FIG. 回動杆を、図２における向きと逆方向から見た斜視図である。It is the perspective view which looked at the rotation hook from the direction opposite to the direction in FIG. 図３のVI−VI線断面図である。It is the VI-VI sectional view taken on the line of FIG. 図３のVII−VII線断面図である。It is the VII-VII sectional view taken on the line of FIG. 肘掛けの中央縦断側面図である。It is a center vertical side view of an armrest. 肘当てを取り外して示す肘掛け装置の組立て斜視図である。It is an assembly perspective view of the armrest apparatus which removes and shows an armrest. 肘当てを取り外した状態の肘掛けの平面図である。It is a top view of the armrest of the state which removed the armrest. 図１０のXI−XI線拡大縦断正面図である。It is the XI-XI line enlarged vertical front view of FIG. 同じく、XII−XII線拡大縦断正面図である。Similarly, it is a XII-XII line expansion longitudinal front view. 肘掛けを前方に移動したときの平面図である。It is a top view when an armrest is moved ahead. 同じく、外側方に移動したときの平面図である。Similarly, it is a top view when moving outward. 同じく、反時計方向に回動したときの平面図である。Similarly, it is a top view when it rotates counterclockwise. 肘掛けの変形例の分解斜視図である。It is a disassembled perspective view of the modification of an armrest.

以下、本発明の肘掛け装置について、図面を参照して説明する。
図１は、本発明の肘掛け装置を備える椅子の斜視図で、この椅子は、先端にキャスタ１を設けた放射状に延びる５本の脚２の中央に支柱３を立設し、この支柱３の上端に、座４および背凭れ５を支持する支基６を設けたものよりなっている。 Hereinafter, an armrest device of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a chair provided with an armrest device according to the present invention. This chair has a column 3 erected at the center of five legs 2 extending radially with a caster 1 at the tip. An upper end is provided with a support base 6 that supports the seat 4 and the backrest 5.

背凭れ５は、側面視ほぼＬ字状をなす左右１対の背凭れ支持杆(その一方のみを図示する)７における後部の起立部７ａをもって支持され、両背凭れ支持杆７における上記起立部７ａの下端より前方を向く前向部７ｂの前端部は、支基６を左右方向に貫通する枢軸８の両端部に固着されている。   The backrest 5 is supported by a rear standing portion 7a in a pair of left and right backrest supporting rods 7 (only one of which is shown in the figure) that is substantially L-shaped in a side view. The front end portion of the forward portion 7b facing forward from the lower end of 7a is fixed to both end portions of the pivot 8 that penetrates the support base 6 in the left-right direction.

支基６内には、枢軸８を介して、背凭れ支持杆７を、背凭れ５が起立する方向に向かって付勢する付勢手段が設けられているが、それは、本発明には直接関係しないので、図示および詳細な説明は省略する。   The support base 6 is provided with a biasing means for biasing the backrest support rod 7 through the pivot 8 in the direction in which the backrest 5 stands up. Since it is not related, illustration and detailed description are omitted.

背凭れ支持杆７の前向部７ｂにおける枢軸８より若干後方の部分に設けた上向突片７ｃの上端部は、座４の後下部と左右方向を向く軸(図示略)をもって連結されている。   The upper end portion of the upward projecting piece 7c provided at a portion slightly rearward from the pivot 8 in the forward portion 7b of the backrest support rod 7 is connected to the rear lower portion of the seat 4 with a shaft (not shown) facing in the left-right direction. Yes.

座４の前下部は、後下方に向かって傾斜する支基６の前部上面６ａに沿って前後方向に摺動しうるように、支基に装着されている。
したがって、座４は、背凭れ５が後傾するのに伴って、後部が後下方に移動し、かつ前部が支基６の前部上面６ａに沿って後下方に移動するようになっている。 The front lower portion of the seat 4 is attached to the support base so that it can slide in the front-rear direction along the front upper surface 6a of the support base 6 that is inclined rearward and downward.
Accordingly, the seat 4 is configured such that as the backrest 5 tilts backward, the rear part moves rearward and downward, and the front part moves rearward and downward along the front upper surface 6a of the support base 6. Yes.

図１〜図４に示すように、背凭れ支持杆７の前向部７ｂにおける上向突片７ｃよりさらに後方で、かつ前向部７ｂの前後方向の中間部には、肘掛け装置９が装着されている。   As shown in FIGS. 1 to 4, an armrest device 9 is attached to the intermediate portion in the front-rear direction of the forward portion 7 b further behind the upward projecting piece 7 c in the forward portion 7 b of the backrest support rod 7. Has been.

肘掛け装置９は、肘掛け支柱１０とその上端に取り付けられた肘掛け１１とからなっている。
肘掛け支柱１０は、上下方向を向く起立部１２ａの下端より内側方よりわずかに下方を向く内向部１２ｂが連設されることにより正面視ほぼＬ字状をなす下部支持杆１２と、その起立部１２ａに、高さ調節装置１３をもって、高さ調節能として装着された上部支持筒１４とからなっており、肘掛け１１は、上部支持筒１４の上端に取り付けられている。 The armrest device 9 includes an armrest column 10 and an armrest 11 attached to the upper end thereof.
The armrest strut 10 includes a lower support rod 12 that is substantially L-shaped when viewed from the front by connecting an inward portion 12b that faces slightly downward from the lower end of an upright portion 12a that faces in the up-down direction, and an upright portion thereof. 12a includes an upper support cylinder 14 mounted as a height adjustment device with a height adjustment device 13, and the armrest 11 is attached to the upper end of the upper support cylinder 14.

下部支持杆１２における内向部１２ｂは、前後方向に長い楕円形断面をなして、内方に向かって漸次拡開し、その内端面には、側面形が前後方向に長い長円形または楕円形をなし、平面形が中央に縦溝１５ａを有する二股状をなす内向突部１５が形成されている。   The inward portion 12b of the lower support rod 12 has an elliptical cross section that is long in the front-rear direction, and gradually expands inward. None, an inward projection 15 having a bifurcated shape with a longitudinal groove 15a in the center is formed.

下部支持杆１２の内向部１２ｂの下面における外端部から内端近くにかけては、後述するボルト１９の頭部１９ａを挿入し易くするための凹部１６が形成されている。
また、内向部１２ｂ内には、内向突部１５における縦溝１５ａの中央と整合する左右方向を向くボルト挿通孔１７が設けられている。 A concave portion 16 for facilitating insertion of a head 19a of a bolt 19 described later is formed from the outer end portion of the lower surface of the inward portion 12b of the lower support rod 12 to the vicinity of the inner end.
Further, in the inward portion 12b, there is provided a bolt insertion hole 17 facing in the left-right direction that is aligned with the center of the longitudinal groove 15a in the inward projection 15.

背凭れ支持杆７の前向部７ｂにおける上向突片７ｃよりさらに後方の下部支持杆１２取付部には、内向突部１５と補形をなす凹部１８が設けられており、内向突部１５の縦溝１５ａに嵌合する上下方向を向く突条１８ａの外端面には、雌ねじ孔１９が設けられている。   The lower support rod 12 mounting portion further behind the upward projecting piece 7c of the forward support portion 7b of the backrest support rod 7 is provided with a concave portion 18 that complements the inward projection portion 15, and the inward projection portion 15 is provided. A female screw hole 19 is provided on the outer end surface of the ridge 18a facing in the vertical direction to be fitted in the vertical groove 15a.

下部支持杆１２は、その内向部１２ｂの内端面が背凭れ支持杆７の前向部７ｂの外側面に当接するようにして、内向突部１５を凹部１８に嵌合し、ボルト２０の頭部２０ａが凹部１２内に位置するようにして、ボルト２０の軸部２０ｂをボルト挿通孔１７に挿通し、かつボルト２０の雄ねじ部２０ｃを、背凭れ支持杆７の前向部７ｂにおける雌ねじ孔１９に螺合して締め付けることにより、背凭れ支持杆７に、前後左右に位置ずれすることなく、強固に固着され、下部支持杆１２の起立部１２ａは、座４の側方において起立している。   The lower support rod 12 is fitted with the inward projection 15 in the recess 18 so that the inner end surface of the inward portion 12b contacts the outer surface of the forward portion 7b of the back support rod 7, and the head of the bolt 20 The shaft portion 20 b of the bolt 20 is inserted into the bolt insertion hole 17 so that the portion 20 a is positioned in the recess 12, and the male screw portion 20 c of the bolt 20 is inserted into the female screw hole in the forward portion 7 b of the backrest support rod 7. By being screwed onto 19 and tightened, the back support rod 7 is firmly fixed without being displaced from front to back and from side to side, and the standing portion 12 a of the lower support rod 12 stands upright on the side of the seat 4. Yes.

下部支持杆１２の起立部１２ａの外形は、前後方向に長い楕円形断面をなし、その上端に、凹入段部２１が形成されることにより、起立部１２ａの上端部は筒状をなしている。
凹入段部２１の底面２１ａの中央には、起立部１２ａの下端部まで至る凹孔２１ｂが設けられている。 The outer shape of the upright portion 12a of the lower support rod 12 has an elliptical cross section that is long in the front-rear direction, and the upper end portion of the upright portion 12a has a cylindrical shape by forming a recessed stepped portion 21 at the upper end. Yes.
In the center of the bottom surface 21a of the recessed stepped portion 21, a recessed hole 21b extending to the lower end portion of the standing portion 12a is provided.

下部支持杆１２の起立部１２ａの上部前面には、凹入段部２１に連通する方形の窓孔２２が設けられている。
また、下部支持杆１２の起立部１２ａの上部における両側部には、前後１対の係合孔２３、２３が設けられている。 A rectangular window hole 22 communicating with the recessed stepped portion 21 is provided on the upper front surface of the upright portion 12 a of the lower support rod 12.
Further, a pair of front and rear engagement holes 23, 23 are provided on both sides of the upper portion of the upright portion 12a of the lower support rod 12.

下部支持杆１２の起立部１２ａの上端部には、中央に上下方向を向く挿通孔２４が設けられた閉塞板２５の下面に、左右１対の垂下側片２６、２６が設けられたエンドキャップ２７が、垂下側片２６、２６が凹入段部２１内に嵌合し、かつ閉塞板２５の下面が起立部１２ａの上端面に当接するようにして装着されている。   An end cap provided with a pair of left and right hanging pieces 26, 26 on the lower surface of a closing plate 25 provided with an insertion hole 24 facing the vertical direction at the center at the upper end of the upright portion 12 a of the lower support rod 12. 27 is mounted such that the drooping side pieces 26, 26 are fitted in the recessed stepped portion 21, and the lower surface of the closing plate 25 is in contact with the upper end surface of the upright portion 12a.

エンドキャップ２７が下部支持杆１２の起立部１２ａの上端部に装着された状態において、下部支持杆１２の起立部１２ａの上端部における左右に対応する係合孔２３、２３と、それらに整合するように左右の垂下側片２６、２６に設けられた係合孔２８、２８とには、左右方向を向くピン２９が嵌合され、エンドキャップ２７は、下部支持杆１２の起立部１２ａの上端部から抜け止めされている。   In a state where the end cap 27 is attached to the upper end portion of the upright portion 12a of the lower support rod 12, the engagement holes 23 and 23 corresponding to the left and right at the upper end portion of the upright portion 12a of the lower support rod 12 are aligned with them. Thus, a pin 29 facing in the left-right direction is fitted into the engagement holes 28, 28 provided in the left and right hanging side pieces 26, 26, and the end cap 27 is the upper end of the upright portion 12 a of the lower support rod 12. It is secured from the part.

下部支持杆１２の起立部１２ａの上端部における凹入段部２１の底面２１ａと、エンドキャップ２７における閉塞板２５の下面と、左右の両垂下側片２６、２６とにより囲まれた空間内には、ロック部材３０が、前後方向に摺動可能として嵌合されている。   In a space surrounded by the bottom surface 21 a of the recessed step portion 21 at the upper end of the upright portion 12 a of the lower support rod 12, the lower surface of the closing plate 25 in the end cap 27, and the left and right hanging side pieces 26, 26. The lock member 30 is fitted so as to be slidable in the front-rear direction.

図２〜図４、および図６に示すように、ロック部材３０は、中央部に、上下方向を向き、かつ前後方向に長い長円形の挿通孔３１が設けられたほぼ長円筒形の胴部３０ａの前端に、下部支持杆１２の起立部１２ａの上端部における窓孔２２を通って起立部１２ａの前面より進退しうるようにした係合突部３０ｂが設けられ、挿通孔３１の内面における左右いずれかに、内方を向く突部３０ｃが設けられ、さらに、胴部３０ａの後面に、ばね受け用突部３０ｄが設けられたものよりなっている。係合突部３０ｂの下面は、前上方を向く傾斜面をなしている。   As shown in FIG. 2 to FIG. 4 and FIG. 6, the lock member 30 has a substantially long cylindrical body portion provided with an oval insertion hole 31 that is oriented in the vertical direction and is long in the front-rear direction. An engagement protrusion 30b is provided at the front end of 30a so as to be able to advance and retract from the front surface of the upright portion 12a through the window hole 22 in the upper end portion of the upright portion 12a of the lower support rod 12. A protrusion 30c facing inward is provided on either the left or right side, and further, a spring receiving protrusion 30d is provided on the rear surface of the body 30a. The lower surface of the engagement protrusion 30b forms an inclined surface facing the front upper side.

ロック部材３０の胴部３０ａの後面と、下部支持杆１２の起立部１２ａの上端部における凹入段部２１内の後壁部分の前面との間には、前後方向を向く付勢手段である圧縮コイルばね３２が、その前端部がばね受け用突部３０ｄに嵌合するようにして縮設されている。   Between the rear surface of the trunk portion 30a of the lock member 30 and the front surface of the rear wall portion in the recessed stepped portion 21 at the upper end portion of the upright portion 12a of the lower support rod 12, there is an urging means that faces in the front-rear direction. The compression coil spring 32 is contracted so that the front end thereof is fitted into the spring receiving projection 30d.

ロック部材３０は、この圧縮コイルばね３２により、前方に向けて付勢され、常時は、係合突部３０ｂが窓孔２２を通って起立部１２ａの前面より突出するロック位置に位置しているが、後述する回動杆４０によって、後方に向けて押動されることにより、係合突部３０ｂが窓孔２２内に没入するアンロック位置に移動しうるようになっている。   The lock member 30 is biased forward by the compression coil spring 32, and is normally positioned at a lock position where the engagement protrusion 30b protrudes from the front surface of the upright part 12a through the window hole 22. However, the engagement protrusion 30b can be moved to the unlock position where it is immersed in the window hole 22 by being pushed rearward by a rotating rod 40 described later.

上部支持筒１４は、前後方向に長い楕円形の筒状をなし、上端部に、上方に向かって拡開し、特に前方に向かって長く張り出す拡大部１４ａを備えている。拡大部１４ａの前部には、後述する操作レバー４３の一部が挿通する窓孔３３が設けられている。また、上部支持筒１４の下端部には、内向鍔部１４ｂが設けられている。さらに、拡大部１４ａの上面には、浅い凹入段部１４ｃが形成されている。   The upper support cylinder 14 has an elliptical cylinder shape that is long in the front-rear direction, and has an enlarged portion 14a that expands upward and extends particularly forward in the upper end portion. A window hole 33 through which a part of an operation lever 43 described later is inserted is provided at the front of the enlarged portion 14a. Further, an inward flange portion 14 b is provided at the lower end portion of the upper support cylinder 14. Further, a shallow recessed step 14c is formed on the upper surface of the enlarged portion 14a.

上部支持筒１４内には、下部支持杆１２の起立部１２ａに上下方向に摺動可能として外嵌された内筒体３４が内嵌されている。
内筒体３４の上部には、それより下方の部分よりわずかに拡大する拡大段部３４ａが形成されており、その内部の凹入段部３５の底壁３５ａの中央には、後述する回動杆４０が挿通する挿通孔３６が設けられている。 Inside the upper support cylinder 14 is fitted an inner cylinder 34 that is externally fitted to the upright portion 12a of the lower support rod 12 so as to be slidable in the vertical direction.
In the upper part of the inner cylindrical body 34, an enlarged step part 34a that is slightly enlarged from the part below it is formed, and in the center of the bottom wall 35a of the recessed step part 35 inside, there is a rotation described later. An insertion hole 36 through which the flange 40 is inserted is provided.

拡大段部３４ａの前面には、操作レバー４３の一部が前後方向に挿通する縦溝３７が設けられ、その後方における凹入段部３５の左右の内側面に設けた上下方向を向くリブ３５ｂ、３５ｂの内側面には、操作レバー４３の枢軸４４を受支する、上端が開口するＵ字状溝３８、３８が設けられている。   A longitudinal groove 37 through which a part of the operation lever 43 is inserted in the front-rear direction is provided on the front surface of the enlarged step part 34a, and a rib 35b facing the up-down direction provided on the left and right inner side surfaces of the recessed step part 35 at the rear. , 35b are provided with U-shaped grooves 38, 38 for receiving the pivot 44 of the operation lever 43 and having an open upper end.

内筒体３４における拡大段部３４ａより下方の部分における前面には、複数の方形の係合孔３９が、上下方向に並べて設けられている。各係合孔３９の下縁は、後下方を向く傾斜面をなしている。   A plurality of rectangular engagement holes 39 are arranged in the vertical direction on the front surface of the inner cylinder 34 below the enlarged step portion 34a. The lower edge of each engagement hole 39 forms an inclined surface facing rearward and downward.

回動杆４０は、上部支持筒１４および内筒体３４と同芯をなす円柱状の軸部４０ａの上端に大径の円板部４０ｂを連設し、さらにその上に半円弧状とした被操作部４０ｃを連設したものよりなり、図５に示すように、軸部４０ａの外周面には、円板部４０ｂの直下から軸部４０ａの下端近傍まで至る上下方向の縦溝４１ａと、縦溝４１ａの下端部より軸部４０ａの円周方向を向く横溝４１ｂと、横溝４１ｂにおける縦溝４１ａとの連設端部と反対側の端部から軸部４１ａの下端までに至る上下方向の縦溝４１ｃとからなるクランク状の凹溝４１が設けられている。   The rotary rod 40 has a large-diameter disk portion 40b connected to the upper end of a columnar shaft portion 40a concentric with the upper support cylinder 14 and the inner cylinder 34, and further has a semicircular arc shape thereon. As shown in FIG. 5, a vertical groove 41a in the vertical direction extending from directly below the disk portion 40b to the vicinity of the lower end of the shaft portion 40a is formed on the outer peripheral surface of the shaft portion 40a. The horizontal groove 41b facing the circumferential direction of the shaft portion 40a from the lower end portion of the vertical groove 41a, and the vertical direction extending from the end of the horizontal groove 41b opposite to the connecting end of the vertical groove 41a to the lower end of the shaft portion 41a A crank-shaped concave groove 41 comprising a vertical groove 41c is provided.

被操作部４０ｃにおける半円弧の弦となる平削面は、回動杆４０の中心軸線と平行をなし、後述する操作レバー４３の作動部４３ｂが当接する当接面４０ｄをなしている。   A planing surface serving as a semicircular chord in the operated portion 40c is parallel to the central axis of the rotary rod 40, and forms a contact surface 40d on which an operating portion 43b of the operation lever 43 described later contacts.

回動杆４０は、円板部４０ｂの下面が、内筒体３４の底壁３５ａの上面に当接し、かつ縦溝４１ａにロック部材３０の突部３０ｃが遊嵌するようにして、軸部４０ａが、内筒体３４の底壁３５ａの挿通孔３６と、エンドキャップ２７における閉塞板２５の挿通孔２４と、ロック部材３０の挿通孔３１とを通って、下部支持杆１２の起立部１２ａにおける凹孔２１ｂ内に回動可能として挿入されている。   The rotary rod 40 has a shaft portion such that the lower surface of the disc portion 40b is in contact with the upper surface of the bottom wall 35a of the inner cylindrical body 34 and the protrusion 30c of the lock member 30 is loosely fitted in the vertical groove 41a. 40 a passes through the insertion hole 36 of the bottom wall 35 a of the inner cylinder 34, the insertion hole 24 of the closing plate 25 in the end cap 27, and the insertion hole 31 of the lock member 30, and the raised portion 12 a of the lower support rod 12. Is inserted into the concave hole 21b so as to be rotatable.

回動杆４０における縦溝４１ａと、ロック部材３０における突部３０ｃとにより、回動杆４０の一方向への回動により、ロック部材３０をアンロック位置方向へ移動させるように、回動杆４０とロック部材３０とを連係する連係機構４２が形成されている。   The pivot rod 41 is moved in the unlock position direction by the pivot groove 40 in one direction by the vertical groove 41a in the pivot rod 40 and the protrusion 30c in the lock member 30. A linkage mechanism 42 that links 40 and the lock member 30 is formed.

すなわち、図６に示すように、ロック部材３０がロック位置に位置している状態から、回動杆４０を、図６における時計回りに回動させると、縦溝４１ａの前方に位置する側面が作動部をなして、突部３０ｃを後方に押動し、それによって、ロック部材３０は、圧縮コイルばね３２の付勢力に抗して、後方に移動させられ、アンロック位置となる。   That is, as shown in FIG. 6, when the rotary rod 40 is rotated clockwise in FIG. 6 from the state where the lock member 30 is located at the lock position, the side surface located in front of the vertical groove 41a is An operating portion is formed, and the protrusion 30c is pushed rearward, whereby the lock member 30 is moved rearward against the urging force of the compression coil spring 32 and becomes the unlock position.

上述のように、凹溝４１をクランク状としたのは、肘掛け１１とともに上部支持筒１４を上限まで持ち上げた際に、ロック部材３０の突部３０ｃが縦溝４１ａの下端に当接して、上部支持筒１４のそれ以上の上昇を阻止するためと、回動杆４０を、挿入途中で中心軸線回りに若干回動させることにより、下部支持杆１２の起立部１２ａ内に出し入れできるようにするためである。   As described above, the concave groove 41 has a crank shape because when the upper support cylinder 14 is lifted up to the upper limit together with the armrest 11, the protrusion 30c of the lock member 30 comes into contact with the lower end of the vertical groove 41a. In order to prevent the support cylinder 14 from rising further, and to turn the pivot rod 40 around the central axis in the middle of insertion, so that it can be taken in and out of the standing portion 12a of the lower support rod 12. It is.

操作レバー４３は、前後方向の中間部を左右方向に貫通する枢軸４３の両端部を、内筒体３４における左右のＵ字状溝３８、３８内に上方より落とし込むことにより、内筒体３４の凹入段部３５内に枢着され、前部の操作部４３ａが、内筒体３４の縦溝３７、および上部支持筒１４の窓孔３３を通って、窓孔３３より下方に向かって突出している。   The operation lever 43 drops both ends of the pivot 43 that penetrates the middle part in the front-rear direction in the left-right direction into the left and right U-shaped grooves 38, 38 of the inner cylinder 34 from above, thereby The front operation portion 43a is pivotally mounted in the recessed step portion 35 and protrudes downward from the window hole 33 through the vertical groove 37 of the inner cylindrical body 34 and the window hole 33 of the upper support cylinder 14. ing.

操作レバー４３における枢軸４３より後方の作動部４３ｂは、側面視下向きフック状をなして後方に突出するとともに、先端部が回動杆４０の中心軸線より側方に偏倚し、図７に示すように、回動杆４０の被操作部４０ｃにおける当接面４０ｄの偏心部に後方より当接するようになっている。   As shown in FIG. 7, the operating portion 43 b of the operation lever 43 behind the pivot 43 protrudes rearward in a side-view downward hook shape, and the tip end is biased laterally from the central axis of the rotary rod 40. Furthermore, it comes into contact with the eccentric part of the contact surface 40d of the operated part 40c of the rotating rod 40 from the rear.

上部支持筒１４の上端における凹入段部１４ｃには、閉塞部材４５が嵌合され、かつ、止めねじ４６をもって固着されている。閉塞部材４５の上面におけるほぼ中央部には、上向突部４７が突設されており、これをもって、閉塞部材４５上に、肘掛け１１が装着されている。
閉塞部材４５の上面および上部支持筒１４の上端面は、肘掛け１１を支持する受支面をなし、かつ上向突部４７は、受支面より上方に突出する肘掛け支柱１０の上端部をなしている。 A closing member 45 is fitted into the recessed step 14 c at the upper end of the upper support cylinder 14 and fixed with a set screw 46. An upward projecting portion 47 protrudes from a substantially central portion of the upper surface of the closing member 45, and the armrest 11 is mounted on the closing member 45.
The upper surface of the closing member 45 and the upper end surface of the upper support cylinder 14 form a receiving surface that supports the armrest 11, and the upward protrusion 47 forms the upper end portion of the armrest column 10 that protrudes upward from the receiving surface. ing.

内筒体３４は、この閉塞部材４５と上部支持筒１４の内向鍔部１４ｂとにより上下から挟まれることによって、上部支持筒１４から外れ止めされ、かつ楕円形の上部支持筒１４内に密接状態で内嵌されることにより、上部支持筒１４に対して回り止めされている。   The inner cylinder 34 is prevented from coming off from the upper support cylinder 14 by being sandwiched from above and below by the closing member 45 and the inward flange portion 14 b of the upper support cylinder 14, and is in close contact with the elliptical upper support cylinder 14. By being internally fitted, it is prevented from rotating with respect to the upper support cylinder 14.

また、回動杆４０や操作レバー４３も、閉塞部材４５によって、上部支持筒１４および内筒体３４から外れ止めされている。   Further, the pivot rod 40 and the operation lever 43 are also prevented from coming off from the upper support cylinder 14 and the inner cylinder 34 by the closing member 45.

普段は、ロック部材３０は、圧縮コイルばね３２の付勢力により前方に向けて付勢され、係合突部３０ｂが内筒体３４のいずれかの係合孔３９に係合したロック位置に位置していることにより、内筒体３４と、それと一体の上部支持筒１４および肘掛け１１は、適宜の高さに保持されている。   Normally, the lock member 30 is urged forward by the urging force of the compression coil spring 32, and the engagement protrusion 30 b is positioned at the lock position where it is engaged with any of the engagement holes 39 of the inner cylinder 34. By doing so, the inner cylinder 34, the upper support cylinder 14 and the armrest 11 integral therewith are held at appropriate heights.

この状態から、肘掛け１１の高さを変更したいときは、操作レバー４３の操作部４３ａを、圧縮コイルばね３２の付勢力に抗して、上向きに押し上げる。
すると、枢軸４４を中心として、操作レバー４３の作動部４３ｂが下向きに回動し、その先端で、回動杆４０の被操作部４０ｃにおける当接面４０ｄの偏心部を前方に押動し、それによって、回動杆４０は、図７および図６における時計回りに回動させられ、縦溝４１ａの前方の内側面である作動部によって、ロック部材３０の突部３０ｃを後方に押動し、それによって、ロック部材３０は、圧縮コイルばね３２の付勢力に抗して、後方に移動させられ、アンロック位置となる。 When it is desired to change the height of the armrest 11 from this state, the operation portion 43a of the operation lever 43 is pushed upward against the urging force of the compression coil spring 32.
Then, the operating portion 43b of the operation lever 43 is rotated downward about the pivot 44, and the eccentric portion of the contact surface 40d of the operated portion 40c of the rotating rod 40 is pushed forward at the tip thereof. Accordingly, the rotating rod 40 is rotated clockwise in FIGS. 7 and 6, and the projecting portion 30 c of the lock member 30 is pushed rearward by the operating portion which is the inner surface in front of the vertical groove 41 a. Thereby, the lock member 30 is moved rearward against the urging force of the compression coil spring 32, and becomes the unlock position.

ロック部材３０がアンロック位置まで後退させられると、ロック部材３０の係合突部３０ｂが、それまで嵌合していた内筒体３４の係合孔３９から離脱し、肘掛け１１および上部支持筒１４は、下部支持杆１２の起立部１２ａに対して上下方向に自由に移動できるようになる。   When the lock member 30 is retracted to the unlock position, the engagement protrusion 30b of the lock member 30 is disengaged from the engagement hole 39 of the inner cylinder 34 that has been fitted so far, and the armrest 11 and the upper support cylinder are released. 14 can move freely in the vertical direction with respect to the standing portion 12a of the lower support rod 12.

肘掛け１１を所望の高さまで移動させた後、操作レバー４３の操作部４３ａから手を離すと、ロック部材３０は、圧縮コイルばね３２の付勢力により、前方に向けて押動され、ロック部材３０の係合突部３０ｂは、内筒体３４のいずれかの係合孔３９に嵌合するか、または先端が内筒体３４の内面に当接して停止させられる。   After moving the armrest 11 to a desired height, when the hand is released from the operation portion 43 a of the operation lever 43, the lock member 30 is pushed forward by the urging force of the compression coil spring 32, and the lock member 30. The engaging protrusion 30b is fitted into any of the engaging holes 39 of the inner cylinder 34, or the tip thereof is brought into contact with the inner surface of the inner cylinder 34 and stopped.

後者の場合は、その後肘掛け１１を上方または下方のいずれかにわずかに移動させるだけで、係合突部３０ｂは、最も近い係合孔３９に嵌合する。   In the latter case, the engagement protrusion 30b is fitted into the closest engagement hole 39 by moving the armrest 11 slightly upward or downward.

ロック部材３０の係合突部３０ｂが、内筒体３４のいずれかの係合孔３９に嵌合し、ロック部材３０がロック位置で停止すると、内筒体３４と、それと一体の上部支持筒１４および肘掛け１１は、そのときの高さに保持される。   When the engagement protrusion 30b of the lock member 30 is fitted into any of the engagement holes 39 of the inner cylinder 34 and the lock member 30 stops at the lock position, the inner cylinder 34 and the upper support cylinder integral with the inner cylinder 34 are obtained. 14 and the armrest 11 are held at the height at that time.

また、肘掛け１１を上方に引き上げたいときは、肘掛け１１を上方に持ち上げるだけでよい。このときの内筒体３４の上昇により、ロック部材３０の係合突部３０ｂが係合している係合孔３９の下縁の傾斜面が、係合突部３０ｂの下縁の傾斜面を後方に向かって押動し、ロック部材３０を、圧縮コイルばね３２の付勢力に抗して、アンロック位置まで移動させ、係合突部３０ｂが、それまで係合していた係合孔３９の次段の係合孔３９に係合すると、ロック部材３０は、圧縮コイルばね３２の付勢力により、再度ロック位置まで移動させられ、その後、同じ動作を繰り返すことにより、肘掛け１１を、係合孔３９の一段ずつ上昇させることができる。   Further, when it is desired to lift the armrest 11 upward, it is only necessary to lift the armrest 11 upward. As the inner cylindrical body 34 is raised at this time, the inclined surface of the lower edge of the engaging hole 39 engaged with the engaging protrusion 30b of the lock member 30 becomes the inclined surface of the lower edge of the engaging protrusion 30b. The lock member 30 is pushed rearward to move the lock member 30 to the unlock position against the urging force of the compression coil spring 32, and the engagement protrusion 30b has been engaged so far. When the engagement member 39 of the next stage is engaged, the lock member 30 is moved again to the lock position by the urging force of the compression coil spring 32, and then the same operation is repeated to engage the armrest 11 with each other. The holes 39 can be raised step by step.

肘掛け１１が上限に達すると、ロック部材３０の突部３０ｃが、凹溝４１における縦溝４１ａの下端に当接して、肘掛け１１のそれ以上の上昇が阻止される。   When the armrest 11 reaches the upper limit, the protrusion 30c of the lock member 30 comes into contact with the lower end of the vertical groove 41a in the concave groove 41, and the armrest 11 is prevented from further rising.

この肘掛け装置９においては、回動杆４０は、肘掛け１１とともに、ロック部材３０に対して上下方向に移動するだけで、回動杆４０とロック部材３０と連係機構４２との関係は何ら変動することはないので、肘掛け１１がどのような高さに位置していても、常に同一の条件で、軽快にロックおよびロック解除操作することができる。
しかも、回動杆４０とロック部材３０と連係機構４２との関係が変動することがないので、誤操作および誤作動のおそれを少なくすることができる。
また、肘掛けの移動ストロークを大としても、肘掛け全体の上下方向の長さを大とする必要がないので、肘掛け装置全体の小型化、および材料費の削減を図ることができるとともに、椅子への肘掛け装置の取付位置の自由度を増すことができる。 In this armrest device 9, the pivot rod 40 moves together with the armrest 11 in the vertical direction with respect to the lock member 30, and the relationship between the pivot rod 40, the lock member 30, and the linkage mechanism 42 changes at all. Therefore, no matter what height the armrest 11 is located, it can always be easily locked and unlocked under the same conditions.
In addition, since the relationship between the rotary rod 40, the lock member 30, and the linkage mechanism 42 does not fluctuate, the risk of erroneous operation and malfunction can be reduced.
In addition, even if the armrest moving stroke is large, it is not necessary to increase the length of the entire armrest in the vertical direction, so that the armrest device as a whole can be downsized and the material cost can be reduced. The degree of freedom of the mounting position of the armrest device can be increased.

以上の構成のうち、下部支持杆１２が什器における支持体をなし、上部支持筒１４が、上記支持体に、上下方向に移動可能として装着された移動部材をなし、内筒体３４が、移動部材である上部支持筒１４に固着され、かつ上下方向に複数の係合孔３９とした係合部が設けられた上下方向を向くガイド部材をなし、それらと、ロック部材３０、圧縮コイルばね３２とした付勢手段、回動杆４０、連係機構４２、および操作レバー４３とにより、什器における高さ調節装置が形成されている。   Of the above configuration, the lower support rod 12 serves as a support in the fixture, the upper support tube 14 serves as a moving member mounted on the support so as to be movable in the vertical direction, and the inner cylinder 34 moves. A guide member that is fixed to the upper support cylinder 14 that is a member and that has a plurality of engagement holes 39 in the vertical direction and that faces in the vertical direction is formed with the lock member 30 and the compression coil spring 32. The urging means, the rotary rod 40, the linkage mechanism 42, and the operation lever 43 form a height adjusting device for the fixture.

すなわち、この実施形態においては、高さ調節装置１３を、椅子の肘掛け装置９における肘掛け１１を、下部支持杆１２に対して高さ調節可能とするためのものとしてあるが、本発明は、これに限定されるものではなく、什器全般において、支持体に対して上下方向に移動可能とした移動部材の高さ調節装置として、広く適用することができる。   That is, in this embodiment, the height adjusting device 13 is configured to be able to adjust the height of the armrest 11 in the armrest device 9 of the chair with respect to the lower support rod 12. However, the present invention can be widely applied as a height adjusting device for a moving member that can move in the vertical direction with respect to the support in all fixtures.

次に、肘掛け装置９における肘掛け１１の構成を詳細に説明する。
図２および図８〜図１２に示すように、肘掛け１１は、上述した閉塞部材４５の上面の受止面により支持された遮蔽部材を兼ねる肘掛け支持板５０と、この肘掛け支持板５０により支持された肘掛け基板５１と、この肘掛け支持板５０および肘掛け基板５１を、水平方向に移動可能かつ上方に移動不能として肘掛け支柱１０の上端面との間に挾持する保持手段７１と、この保持手段７１と肘掛け基板５１の上面を覆うようにして、肘掛け基板５１に装着した、エラストマー等よりなる肘当て５２とを備えている。受支面である閉塞部材４５の上面より起立し、かつ肘掛け支柱１０の上端部をなす上述の上向突部４７は、パイプよりなり、その下端部を閉塞部材４５に穿設された貫通孔５３に圧嵌するか、または溶接等により固着することにより、閉塞部材４５の上面に突設されている。上向突部４７の上端には、四角ナット５４が、溶接等により固着されている。 Next, the configuration of the armrest 11 in the armrest device 9 will be described in detail.
As shown in FIGS. 2 and 8 to 12, the armrest 11 is supported by the armrest support plate 50 that also serves as a shielding member supported by the receiving surface on the upper surface of the closing member 45 described above, and the armrest support plate 50. The armrest substrate 51, the armrest support plate 50 and the armrest substrate 51 that are movable in the horizontal direction and are not movable upward, and are held between the upper end surfaces of the armrest struts 10, and the holding means 71 An elbow rest 52 made of an elastomer or the like attached to the armrest substrate 51 is provided so as to cover the upper surface of the armrest substrate 51. The above-mentioned upward projecting portion 47 that stands up from the upper surface of the closing member 45 that is a receiving surface and forms the upper end portion of the armrest strut 10 is made of a pipe, and a through-hole that has a lower end portion formed in the closing member 45. It is projectingly provided on the upper surface of the closing member 45 by being press-fitted to 53 or fixed by welding or the like. A square nut 54 is fixed to the upper end of the upward projection 47 by welding or the like.

肘掛け支持板５０は、前後寸法が、上部支持筒１４の上面の前後方向の長さよりも十分に大きく、かつ左右寸法が、肘掛け基板５１の幅とほぼ同等の前後方向に長い概ね長方形をなす閉塞板５０ａを有し、この閉塞板５０ａの中央部の上面には、肘掛け基板５１を、第２方向である前後方向に案内するためのガイド突部５５が、一体的に上向きに突設されている。このガイド突部５５は、左右幅が閉塞部材４５の左右寸法とほぼ等しく、かつ上下寸法が肘掛け基板５１の底面板５１ａの厚さとほぼ等しい平面視概ね方形をなし、両側面には、互いに平行な前後方向に長い摺接面５５ａ、５５ａを有している。   The armrest support plate 50 has a front-rear dimension that is sufficiently larger than the length of the upper surface of the upper support cylinder 14 in the front-rear direction, and the left-right dimension is a substantially rectangular shape that is long in the front-rear direction substantially the same as the width of the armrest substrate 51. A guide protrusion 55 for guiding the armrest board 51 in the front-rear direction, which is the second direction, is integrally projected upward on the upper surface of the central portion of the closing plate 50a. Yes. The guide protrusion 55 has a substantially rectangular shape in plan view, the left-right width being substantially equal to the left-right dimension of the closing member 45 and the vertical dimension being substantially equal to the thickness of the bottom surface plate 51a of the armrest substrate 51, and both sides are parallel to each other. Long slidable contact surfaces 55a, 55a are provided in the front-rear direction.

ガイド突部５５の中央部には、左右方向を向く長孔５６が、上下に貫通させて形成され、長孔５６の上面の開口縁には、短寸の縁片５７が上向きに突設されている。
ガイド突部５５の長孔５６を閉塞部材４５の上向突部４７に遊嵌することにより、肘掛け支持板５０は、左右方向に移動可能かつ上向突部４７回りに水平回動可能として、上部支持筒１４の上端の閉塞部材４５の上面により支持されている。なお、長孔５６を上向突部４７に遊嵌した際、四角ナット５４を含む上向突部４７の上端部が、ガイド突部５５の上面より若干突出するようになっている。また、長孔５６の左右方向の長さは、上向突部４７が長孔５６の端部に当接する限界位置まで肘掛け支持板５０が移動したときでも、長孔５６が肘掛け支柱１０の上端より側方に突出しないように定めてある。 A long hole 56 facing in the left-right direction is formed at the center of the guide protrusion 55 so as to penetrate vertically, and a short edge piece 57 protrudes upward at the opening edge of the upper surface of the long hole 56. ing.
By loosely fitting the elongated hole 56 of the guide protrusion 55 to the upward protrusion 47 of the closing member 45, the armrest support plate 50 can move in the left-right direction and can be horizontally rotated around the upward protrusion 47. The upper support cylinder 14 is supported by the upper surface of the closing member 45 at the upper end. In addition, when the long hole 56 is loosely fitted to the upward protrusion 47, the upper end portion of the upward protrusion 47 including the square nut 54 slightly protrudes from the upper surface of the guide protrusion 55. Further, the length of the long hole 56 in the left-right direction is such that the long hole 56 is at the upper end of the armrest column 10 even when the armrest support plate 50 moves to a limit position where the upward protrusion 47 contacts the end of the long hole 56. It is determined not to protrude more sideways.

ガイド突部５５の前方において、肘掛け支持板５０の左右方向の中央部上面には、後述する下部保持部材６７を連結するための前後方向を向く上向突片５８が、上向きに突設され、上向突片５８の後端はガイド突部５５の前面に連結されている。上向突片５８の前部の上下寸法は、後部よりも大とされ、その部分の上向突片５８の上半部には、その板厚よりも大径をなすとともに、上下方向のめねじ孔５９を有する軸状の拡幅部５８ａが形成されている。   In front of the guide protrusion 55, an upper protrusion 58 that faces in the front-rear direction for connecting a lower holding member 67, which will be described later, protrudes upward on the upper surface of the central portion in the left-right direction of the armrest support plate 50. The rear end of the upward protruding piece 58 is connected to the front surface of the guide protruding portion 55. The vertical dimension of the front part of the upward projecting piece 58 is larger than that of the rear part, and the upper half of the upward projecting piece 58 of that part has a diameter larger than the plate thickness and the vertical dimension of the upper part. A shaft-shaped widened portion 58 a having a screw hole 59 is formed.

肘掛け基板５１は、平面形が前後方向に長い概ね長方形をなし、その底面板５１ａの周縁部の上面には、斜め外上方に拡開する突縁６０と、その内方において起立する、突縁６０よりも長寸の起立片６１とが突設されている。起立片６１における前部と後部の左右の対向面同士は、底面板５１ａの上面より起立する左右方向を向くリブ６２、６２により連結されている。   The armrest substrate 51 has a substantially rectangular plane shape that is long in the front-rear direction, and has a protruding edge 60 that extends obliquely outward and upward on the upper surface of the peripheral edge of the bottom plate 51a, and a protruding edge that stands up inward. A standing piece 61 longer than 60 is projected. The left and right opposing surfaces of the standing piece 61 are connected to each other by ribs 62 and 62 that face in the left-right direction rising from the upper surface of the bottom plate 51a.

肘掛け基板５１における底面板５１ａの中央部、すなわち、前後のリブ６２と左右に対向する起立片６１により囲まれた部分の底面板５１ａには、上記ガイド突部５５に設けた長孔５６と直交する前後方向を向く広幅の開口部６３が形成されている。この開口部６３は、平面視ほぼ長方形をなし、左右の対向面は、上述したガイド突部５５の左右のガイド面５３ａが摺接する１対の被ガイド面６３ａ、６３ａとされている。
開口部６３は、肘掛け支持板５０により常に閉塞されるようになっている。すなわち、肘掛け支持板５０の前後および左右寸法は、後述するように、肘掛け１１を、前後左右方向に最大限移動させた際でも、開口部６３が肘掛け支持板５０により閉塞される大きさとされ、開口部６３に指や異物が入り込まないようにしてある。 The central portion of the bottom plate 51a in the armrest substrate 51, that is, the bottom plate 51a of the portion surrounded by the front and rear ribs 62 and the upright pieces 61 facing left and right, is orthogonal to the long hole 56 provided in the guide protrusion 55. A wide opening 63 facing the front-rear direction is formed. The opening 63 has a substantially rectangular shape in plan view, and the left and right opposing surfaces are a pair of guided surfaces 63a and 63a with which the left and right guide surfaces 53a of the guide protrusion 55 described above are in sliding contact.
The opening 63 is always closed by the armrest support plate 50. That is, the front and rear and left and right dimensions of the armrest support plate 50 are such that the opening 63 is closed by the armrest support plate 50 even when the armrest 11 is moved to the maximum in the front and rear and left and right directions, as will be described later. A finger or a foreign object is prevented from entering the opening 63.

肘掛け基板５１の開口部６３を、肘掛け支持板５０のガイド突部５５に嵌合すると、ガイド突部５５の左右のガイド面５５ａが、開口部６３の左右の被ガイド面６３ａに摺接することにより、肘掛け基板５１は、肘掛け支持板５０の上面に、左右方向に移動不能かつ回動不能として、すなわち、前後方向にのみ相対移動可能として支持されている。これにより、肘掛け基板５１は、肘掛け支持板５０と共に、第１方向である左右方向に移動するとともに、水平回動しうるようになっている。なお、開口部６３をガイド突部５５に嵌合させた際、ガイド突部５５の上面と肘掛け基板５１の底面板５１ａの上面とは同一面に整合するようになっている。   When the opening 63 of the armrest substrate 51 is fitted into the guide protrusion 55 of the armrest support plate 50, the left and right guide surfaces 55 a of the guide protrusion 55 are in sliding contact with the left and right guided surfaces 63 a of the opening 63. The armrest substrate 51 is supported on the upper surface of the armrest support plate 50 so as not to be movable in the left-right direction and to be unrotatable, that is, to be relatively movable only in the front-rear direction. Thereby, the armrest board | substrate 51 can move horizontally while moving to the left-right direction which is a 1st direction with the armrest support plate 50. As shown in FIG. When the opening 63 is fitted to the guide protrusion 55, the upper surface of the guide protrusion 55 and the upper surface of the bottom plate 51 a of the armrest substrate 51 are aligned with each other.

開口部６３の前方において、肘掛け基板５１の底面板５１ａの左右方向の中央部には、後端が開口部６３の前端に連通するとともに、前端が前部のリブ６２付近に至る長さの前後方向を向くスリット６４が、上下に貫通させて形成されている。このスリット６４は、肘掛け基板５１を肘掛け支持板５０に載置する際に、肘掛け支持板５０の上向突片５８の下半部に、拡幅部５８ａがスリット６４の上方に突出するようにして、前後方向に摺動可能に嵌合されるようになっている。   In front of the opening 63, the center of the bottom plate 51a of the armrest substrate 51 in the left-right direction has a rear end communicating with the front end of the opening 63 and a length of the front end extending to the vicinity of the front rib 62. A slit 64 facing in the direction is formed so as to penetrate vertically. The slit 64 is formed so that when the armrest substrate 51 is placed on the armrest support plate 50, the widened portion 58 a protrudes above the slit 64 in the lower half of the upward projecting piece 58 of the armrest support plate 50. , And is slidably fitted in the front-rear direction.

前後のリブ６２、６２間において、左右に対向する起立片６１、６１の下部により内方に突出する内向き段部の互いに対向する内側面には、前後方向を向く左右１対の被ガイド面６５、６５が形成されている。被ガイド面６５、６５の後半部の左右に対向する内側面には、外側方に凹入する前後複数の係合溝６６が形成されている。   Between the front and rear ribs 62, 62, a pair of left and right guided surfaces facing in the front-rear direction are formed on the inner surfaces facing each other of the inwardly protruding step portions protruding inward by the lower portions of the standing pieces 61, 61 facing left and right 65 and 65 are formed. A plurality of front and rear engaging grooves 66 that are recessed outward are formed on the inner side surfaces of the guided surfaces 65, 65 facing the left and right of the rear half.

肘掛け基板５１の底面板５１ａの中央部上面には、下部保持部材６７と、上部保持部材６８と、それらを上方から押さえる固定部材６９およびボルト７０とからなる保持手段７１が装着されている。
肘掛け基板５１の底面板５１ａの中央部上面、すなわち前後のリブ６２と左右に対向する起立片６１により囲まれた内方の凹部内において、底面板５１ａの上面には、肘掛け支持板５０とにより、肘掛け基板５１を前後左右方向に相対移動可能に挟持する、上記の下部保持部材６７が、前後方向に移動可能に収容されている。この下部保持部材６７は、前後寸法が前後のリブ６２、６２間の寸法よりも所要寸法小さく、かつ左右寸法を、左右に対向する起立片６１間の離間寸法とほぼ同等とすることにより、肘掛け基板５１の底面板５１ａの上面を前後方向にのみ相対移動しうるようになっている。 A holding means 71 including a lower holding member 67, an upper holding member 68, a fixing member 69 and a bolt 70 for pressing them from above is mounted on the upper surface of the central portion of the bottom plate 51 a of the armrest substrate 51.
The upper surface of the bottom plate 51 a of the armrest substrate 51, that is, in the inner recess surrounded by the standing ribs 61 facing the front and rear ribs 62, is provided on the upper surface of the bottom plate 51 a by the armrest support plate 50. The lower holding member 67 that holds the armrest substrate 51 so as to be relatively movable in the front-rear and left-right directions is accommodated so as to be movable in the front-rear direction. The lower holding member 67 has an armrest which is smaller in required dimension than the dimension between the front and rear ribs 62 and 62 and is substantially equal to the distance between the standing pieces 61 facing left and right. The upper surface of the bottom plate 51a of the substrate 51 can be relatively moved only in the front-rear direction.

下部保持部材６７の底面板６７ａの中央部には、肘掛け基板５１の開口部６３と直交する左右方向に長い嵌合孔７２が形成され、下部保持部材６７は、この嵌合孔７２を、肘掛け支持板５０におけるガイド突部５５の縁片５７に嵌合させて、肘掛け基板５１の底面板５１ａの上面に載置されている。このように、下部保持部材６７の嵌合孔７２を、ガイド突部５５の縁片５７に嵌合させると、肘掛け支持板５０と下部保持部材６７との位置決めが容易になるとともに、それらの相対移動が防止される。   A fitting hole 72 that is long in the left-right direction perpendicular to the opening 63 of the armrest substrate 51 is formed in the center portion of the bottom plate 67a of the lower holding member 67. The lower holding member 67 defines the fitting hole 72 as an armrest. The support plate 50 is placed on the upper surface of the bottom plate 51 a of the armrest substrate 51 by being fitted to the edge piece 57 of the guide protrusion 55. As described above, when the fitting hole 72 of the lower holding member 67 is fitted to the edge piece 57 of the guide protrusion 55, the armrest support plate 50 and the lower holding member 67 can be easily positioned, and their relative Movement is prevented.

図２および図１２に示すように、下部保持部材６７の底面板６７ａの左右両側縁には、正面視倒立Ｌ字状断面をなす前後方向のガイド部７３、７３が、上向きに連設され、両ガイド部７３は、肘掛け基板５１の左右の被ガイド面６５、６５の上面と内側面に、前後方向に相対移動可能に摺接している。
底面板６７ａの前部には、下端が底面板６７ａの前端に接続され、かつ左右両側端が左右のガイド部７３の前端上部の対向面に接続された前向片６７ｂが連設され、この前向片６７ｂの左右方向の中央部は、肘掛け支持板５０の上向突片５８の拡幅部５８ａの上端に、ねじ７４により連結されている(図８参照)。
なお、前向片６７ｂを、肘掛け支持板５０の上向突片５８にねじ止めすると、肘掛け支持板５０と肘掛け基板５１と下部保持部材６７とを、予め組付けておける利点があるが、下部保持部材６７は、後述するように、上部保持部材６８と固定部材６９により保持されるので、上向突片５８や前向片６７ｂは省略することもある。 As shown in FIG. 2 and FIG. 12, front and rear guide portions 73 and 73 having an L-shaped cross section viewed from the front are continuously provided on the left and right side edges of the bottom plate 67 a of the lower holding member 67. Both guide portions 73 are in sliding contact with the upper and inner surfaces of the left and right guided surfaces 65, 65 of the armrest substrate 51 so as to be relatively movable in the front-rear direction.
A front piece 67b whose lower end is connected to the front end of the bottom plate 67a and whose left and right side ends are connected to the opposing surfaces of the front ends of the left and right guide portions 73 is connected to the front portion of the bottom plate 67a. A central portion in the left-right direction of the forward piece 67b is connected to an upper end of the widened portion 58a of the upward protruding piece 58 of the armrest support plate 50 by a screw 74 (see FIG. 8).
Note that, when the forward piece 67b is screwed to the upward protruding piece 58 of the armrest support plate 50, there is an advantage that the armrest support plate 50, the armrest substrate 51, and the lower holding member 67 can be assembled in advance. Since the holding member 67 is held by the upper holding member 68 and the fixing member 69 as will be described later, the upward protruding piece 58 and the forward piece 67b may be omitted.

図１１に示すように、左右のガイド部７３の後端部には、下向きの弾性係合片７５が、左右の被ガイド面６５と対向するようにして連設され、両弾性係合片７５の外側面には、被ガイド面６５の後半部の係合溝６６に選択的に係合する係合突部７５ａが突設されている。   As shown in FIG. 11, downward elastic engagement pieces 75 are connected to the rear end portions of the left and right guide portions 73 so as to face the left and right guided surfaces 65. An engaging protrusion 75a that selectively engages with the engaging groove 66 in the rear half of the guided surface 65 is provided on the outer surface of the guide surface 65.

図２、図９、および図１０に示すように、下部保持部材６７の底面板６７ａにおける前向片６７ｂと近接する前部と後端部の上面には、左右方向を向く前後１対のガイド片７６、７６が、嵌合孔７２を挟んで対向するように立設され、両ガイド片７６の両側端は、左右のガイド部７３の対向面に接続されている。前部のガイド片７６の前面には、後方に凹入する左右複数の係合溝７７が、後部のガイド片７６の後面には、前方に凹入する左右複数の係合溝７７が、それぞれ形成されている。   As shown in FIGS. 2, 9, and 10, a pair of front and rear guides facing in the left-right direction are provided on the upper surfaces of the front and rear end portions of the bottom plate 67 a of the lower holding member 67 adjacent to the front piece 67 b. The pieces 76 and 76 are erected so as to oppose each other with the fitting hole 72 interposed therebetween, and both side ends of the both guide pieces 76 are connected to opposing surfaces of the left and right guide portions 73. A plurality of left and right engagement grooves 77 recessed rearward are formed on the front surface of the front guide piece 76, and a plurality of left and right engagement grooves 77 recessed forward are formed on the rear surface of the rear guide piece 76, respectively. Is formed.

下部保持部材６７における左右のガイド部７３と前後のガイド片７６とにより囲まれた底面板６７ａの上面には、左右方向を向いて互いに平行をなす前後複数(この例では４本)の突条７８が突設されている。   On the upper surface of the bottom plate 67a surrounded by the left and right guide portions 73 and the front and rear guide pieces 76 in the lower holding member 67, a plurality of front and rear (four in this example) ridges parallel to each other in the left-right direction. 78 projects.

下部保持部材６７における左右のガイド部７３と前後のガイド片７６とにより囲まれた内方の凹部内には、上述した上部保持部材６８が、前後方向に移動不能として収容されている。この上部保持部材６８の前後寸法は、下部保持部材６７の前後のガイド片７６の対向面に摺接する寸法とされ、また左右寸法は、左右のガイド片７６間において左右方向に相対移動しうるように、両ガイド片７６の離間寸法よりも小としてある。これにより、上部保持部材６８は、下部保持部材６７に対して左右方向に相対移動可能、かつ相対回動不能となっている。なお、上部保持部材６８の下面は、下部保持部材６７の底面板６７ａに突設した複数の突条７８上に載置され、下部保持部材６７と上部保持部材６８との互いの接触面積を小さくすることにより、下部保持部材６７に対し上部保持部材６８が左右方向に相対移動する際の摺動摩擦抵抗が小さくなるようにしてある。   The above-described upper holding member 68 is housed in an inwardly recessed portion surrounded by the left and right guide portions 73 and the front and rear guide pieces 76 in the lower holding member 67 so as not to move in the front-rear direction. The front and rear dimensions of the upper holding member 68 are slidable in contact with the opposing surfaces of the front and rear guide pieces 76 of the lower holding member 67, and the left and right dimensions can be moved relative to each other in the left and right directions between the left and right guide pieces 76. Further, the distance between the guide pieces 76 is smaller than the distance between them. As a result, the upper holding member 68 can move relative to the lower holding member 67 in the left-right direction and cannot rotate relative to the lower holding member 67. The lower surface of the upper holding member 68 is placed on a plurality of protrusions 78 protruding from the bottom plate 67a of the lower holding member 67, and the contact area between the lower holding member 67 and the upper holding member 68 is reduced. Thus, the sliding frictional resistance when the upper holding member 68 moves relative to the lower holding member 67 in the left-right direction is reduced.

図９〜図１１に示すように、上部保持部材６８の前後縁における左右方向の中央部には、下部保持部材６７の前後のガイド片７６、７６に上方より係合される下向き鉤形の弾性係合片７９、７９が前後外向きに突設され、上部保持部材６８の前後の端面と各弾性係合片７９とにより各ガイド片７６を挟むことにより、上部保持部材６８は下部保持部材６７に対して、左右方向に円滑に摺動しうるようになっている。
各弾性係合片７９は、外方に弾性変形可能としてあり、その内面に設けた係合突部８０を、前後のガイド片７６における複数の係合溝７７に選択的に弾性係合させることにより、上部保持部材６８は、下部保持部材６７に対して、左右方向に節度感をもって、かつ段階的に安定よく移動しうるようになっている。 As shown in FIGS. 9 to 11, in the center portion in the left-right direction at the front and rear edges of the upper holding member 68, a downward hook-shaped elasticity that is engaged from above with the front and rear guide pieces 76 and 76 of the lower holding member 67. Engagement pieces 79, 79 project outward in the front-rear direction, and the upper holding member 68 is held by the lower holding member 67 by sandwiching the guide pieces 76 between the front and rear end surfaces of the upper holding member 68 and the elastic engaging pieces 79. On the other hand, it can slide smoothly in the left-right direction.
Each elastic engagement piece 79 can be elastically deformed outward, and an engagement protrusion 80 provided on the inner surface thereof is selectively elastically engaged with a plurality of engagement grooves 77 in the front and rear guide pieces 76. Accordingly, the upper holding member 68 can move with respect to the lower holding member 67 in a stepwise and stable manner with a sense of moderation in the left-right direction.

上部保持部材６８の中央部下面には、肘掛け支持板５０の長孔５６の前後幅とほぼ等しい外径の筒状の嵌合突部８１が、下向きに突設され、この嵌合突部８１を、長孔５６に摺動可能に嵌合するとともに、閉塞部材４５の上向突部４７に回動可能に嵌合することにより、上部保持部材６８は、下部保持部材６７の底面板６７ａの上面に、下部保持部材６７に対して左右方向に相対移動可能、かつ閉塞部材４５に対しては相対回動可能として載置されている。なお、嵌合突部８１は、閉塞部材４５と上部保持部材６８間の上下寸法を一定に保持するスペーサとしての機能を有し、嵌合突部８１の下端を閉塞部材４５の上面に当接させることにより、下部保持部材６７の底面板６７ａの上面に、上部保持部材６８の下面が強く当接しないようにしてある。このように、嵌合突部８１の下端を閉塞部材４５の上面に当接させて、上向突部４７に嵌合突部８１を嵌合すると、上向突部４７が補強されて曲げ剛性が大となるので、肘掛け支柱１０の上端による肘掛け１１の支持強度を高めることができる。   On the lower surface of the central portion of the upper holding member 68, a cylindrical fitting protrusion 81 having an outer diameter substantially equal to the front-rear width of the elongated hole 56 of the armrest support plate 50 is protruded downward. The upper holding member 68 is slidably fitted into the long hole 56 and is pivotally fitted to the upward projection 47 of the closing member 45 so that the upper holding member 68 is attached to the bottom plate 67a of the lower holding member 67. The upper surface is mounted so as to be movable relative to the lower holding member 67 in the left-right direction and to the closing member 45 so as to be relatively rotatable. The fitting protrusion 81 functions as a spacer that keeps the vertical dimension between the closing member 45 and the upper holding member 68 constant, and the lower end of the fitting protrusion 81 is brought into contact with the upper surface of the closing member 45. This prevents the lower surface of the upper holding member 68 from coming into strong contact with the upper surface of the bottom plate 67a of the lower holding member 67. In this way, when the lower end of the fitting protrusion 81 is brought into contact with the upper surface of the closing member 45 and the fitting protrusion 81 is fitted to the upward protrusion 47, the upward protrusion 47 is reinforced and the bending rigidity is increased. Therefore, the supporting strength of the armrest 11 by the upper end of the armrest column 10 can be increased.

上部保持部材６８の中央部上面に形成された平面視円形の凹部８２には、上述した円形の固定部材６９が、相対回動可能に収容されている。固定部材６９の中央部下面には、円形突部６９ａが下向きに突設され、この円形突部６９ａは、凹部８２の上面に形成された段付嵌合孔８３の拡径部に、相対回動可能に嵌合されている(図１２参照)。
固定部材６９の後面上部には、突片６９ｂが後向きに突設され、この突片６９ｂは、上部保持部材６８の後部上面に形成された段部８４の上面に摺動可能に当接している。 The circular fixing member 69 described above is accommodated in a circular recess 82 formed on the upper surface of the central portion of the upper holding member 68 so as to be relatively rotatable. A circular protrusion 69a protrudes downward from the lower surface of the central portion of the fixing member 69, and the circular protrusion 69a is disposed relative to the enlarged diameter portion of the stepped fitting hole 83 formed on the upper surface of the recess 82. It is movably fitted (see FIG. 12).
A projecting piece 69b projects rearwardly on the upper rear surface of the fixing member 69, and this projecting piece 69b is slidably in contact with the upper surface of the stepped portion 84 formed on the upper surface of the rear portion of the upper holding member 68. .

固定部材６９は、その中心に穿設された上下方向の段付き貫通孔８５に、上述した挿入したボルト７０を挿入して、閉塞部材４５の上向突部４７の四角ナット５４に上方より螺合することにより、肘掛け支持板５０、肘掛け基板５１、下部保持部材６７および上部保持部材６８を、順次上方から閉塞部材４５の上面に押し付けるようにして、上部保持部材６８の凹部８２内において、上向突部４７の上端に固着されている。この際、固定部材６９の下面が上部保持部材６８の上面に強く当接しないように、すなわち、固定部材６９に対し上部保持部材６８が相対回動しうるように、上向突部４７の四角ナット５４に固定されている。   The fixing member 69 inserts the above-described inserted bolt 70 into the vertical stepped through hole 85 formed in the center thereof, and screws the square nut 54 of the upward projection 47 of the closing member 45 from above. As a result, the armrest support plate 50, the armrest substrate 51, the lower holding member 67, and the upper holding member 68 are sequentially pressed against the upper surface of the closing member 45 from the upper side in the recess 82 of the upper holding member 68. It is fixed to the upper end of the projecting portion 47. At this time, the squares of the upward protrusions 47 are arranged so that the lower surface of the fixing member 69 does not strongly contact the upper surface of the upper holding member 68, that is, the upper holding member 68 can rotate relative to the fixing member 69. It is fixed to the nut 54.

固定部材６９の前部に形成された扇状の厚肉部８６の前面には、上下方向を向く係合溝８７が、円周方向に沿って複数形成されている。厚肉部８６と対向する下部保持部材６７の前部には、上面と後面が開口する上下方向を向く角孔８８が形成され、この角孔８８には、ゴム等の弾性体８９が嵌合されている。この弾性体８９の左右方向の中央部後面と、係合溝８７との対向面間には、上下方向を向く係止ピン９０が、弾性体８９により後方に付勢されるようにして挟入され、この係止ピン９０が、複数の係合溝８７と選択的に弾性係合することにより、上部保持部材６８を含む肘掛け１１全体を、固定部材６９回りに、適宜の抵抗力を付与した状態で、かつ節度感をもって所定の角度だけ回動させうるようになっている。なお、上記係合溝８７を有する固定部材６９、上部保持部材６８の角孔８８に挿入した弾性体８９、および係止ピン９０により、肘掛け１１の水平回動に抵抗力を付与する抵抗力付与手段を構成している。   On the front surface of the fan-shaped thick portion 86 formed in the front portion of the fixing member 69, a plurality of engagement grooves 87 facing in the vertical direction are formed along the circumferential direction. A square hole 88 is formed in the front portion of the lower holding member 67 that faces the thick wall portion 86. The square hole 88 faces upward and downward with the upper surface and the rear surface open. An elastic body 89 such as rubber is fitted into the square hole 88. Has been. Between the rear surface of the central portion of the elastic body 89 in the left-right direction and the facing surface of the engaging groove 87, a locking pin 90 facing in the vertical direction is inserted so as to be urged backward by the elastic body 89. The locking pin 90 is selectively elastically engaged with the plurality of engaging grooves 87, so that the entire armrest 11 including the upper holding member 68 is provided with an appropriate resistance force around the fixing member 69. It can be rotated by a predetermined angle in a state and with a sense of moderation. The fixing member 69 having the engaging groove 87, the elastic body 89 inserted into the square hole 88 of the upper holding member 68, and the locking pin 90 provide a resistance force that applies a resistance force to the horizontal rotation of the armrest 11. Means.

以上説明した肘掛け装置において、肘掛け１１の前後方向の位置調節は、次のようにして行うことができる。
図１３は、図１０に示す後限に位置している肘当て５２を、前限まで移動させた例を示すもので(肘当ては図示略)、この際には、肘当て５２を手で掴んで前方に押動させればよい。すると、閉塞部材４５の上向突部４７に前後方向に移動不能に嵌合された肘掛け支持板５０、肘掛け基板５１の上面において肘掛け支持板５０に前後方向に移動不能に連結された下部保持部材６７、下部保持部材６７の上面に前後方向に移動不能に取付けられた上部保持部材６８、および閉塞部材４５の上向突部４７にねじ止めされた固定部材６９に対し、肘掛け基板５１および肘当て５２のみが前方に相対的に移動する。 In the armrest device described above, the position adjustment of the armrest 11 in the front-rear direction can be performed as follows.
FIG. 13 shows an example in which the elbow rest 52 located at the rear limit shown in FIG. 10 is moved to the front limit (the elbow rest is not shown). In this case, the elbow rest 52 is moved by hand. Grab and push forward. Then, the armrest support plate 50 fitted to the upward protrusion 47 of the closing member 45 so as not to move in the front-rear direction, and the lower holding member connected to the armrest support plate 50 so as to be immovable in the front-rear direction on the upper surface of the armrest substrate 51. 67, an armrest substrate 51 and an elbow rest against an upper holding member 68 that is immovably attached to the upper surface of the lower holding member 67 and a fixing member 69 that is screwed to the upward projection 47 of the closing member 45 Only 52 moves relatively forward.

肘掛け基板５１が前方に移動すると、下部保持部材６７の後端部の左右１対の弾性係合片７５、７５が、肘掛け基板５１における左右１対の被ガイド面６５、６５の後部に設けた前後方向の複数の係合溝６６と係脱しながら、被ガイド面６５に沿って相対的に後方に移動することにより、肘掛け基板５１は、節度感をもって前限位置まで移動する。
この際、上述したように、肘掛け支持板５０の前後左右寸法を、肘掛け基板５１の開口部６３が常に閉塞される大きさとしてあるので、肘掛け基板５１を前後限位置まで移動させても、開口部６３に指や異物が入り込む恐れはない。
なお、肘掛け基板５１の前後位置は、係合溝６６の数だけ段階的に調節しうるので、任意の中間位置に調節することもできる。 When the armrest board 51 moves forward, a pair of left and right elastic engagement pieces 75, 75 at the rear end of the lower holding member 67 are provided at the rear of the pair of left and right guided surfaces 65, 65 on the armrest board 51. By moving relatively back along the guided surface 65 while being engaged with and disengaging from the plurality of engaging grooves 66 in the front-rear direction, the armrest substrate 51 moves to the front limit position with a sense of moderation.
At this time, as described above, the front-rear and left-right dimensions of the armrest support plate 50 are such that the opening 63 of the armrest substrate 51 is always closed, so that the opening can be opened even if the armrest substrate 51 is moved to the front-rear limit position. There is no fear that a finger or a foreign object enters the portion 63.
In addition, since the front-rear position of the armrest board 51 can be adjusted stepwise by the number of the engagement grooves 66, it can also be adjusted to an arbitrary intermediate position.

図１４は、肘当て５２を左右方向、すなわち外側方に平行移動させて左右方向の位置を調節した例を示すもので、この際には、上述したように、肘掛け支持板５０と肘掛け基板５１と下部保持部材６７とが、上部保持部材６８に対し外側方に相対移動するので、上部保持部材６８の前後１対の弾性係合片７９が、下部保持部材６７の前後１対のガイド片７６に沿って内側方に平行移動する。これにより、前後の弾性係合片７９の係合突部８０が、前後のガイド片７６に設けた複数の係合溝７７に選択的に係合することにより、肘当て５２の左右位置の調節を、段階的に、かつ節度感をもって行うことができる。   FIG. 14 shows an example in which the position of the left / right direction is adjusted by translating the armrest 52 in the left / right direction, that is, outward, and in this case, as described above, the armrest support plate 50 and the armrest substrate 51 are shown. And the lower holding member 67 are moved outward relative to the upper holding member 68, so that the pair of front and rear elastic engagement pieces 79 of the upper holding member 68 are paired with the front and rear guide pieces 76 of the lower holding member 67. Translate inward along As a result, the engagement protrusions 80 of the front and rear elastic engagement pieces 79 are selectively engaged with the plurality of engagement grooves 77 provided in the front and rear guide pieces 76, thereby adjusting the left and right positions of the elbow rest 52. Can be performed step by step and with a sense of moderation.

この際、上述したように、肘掛け基板５３の開口部６３は、肘掛け支持板５０のガイド突部５５に、左右方向に相対移動不能に嵌合されているので、肘掛け支持板５０は、肘掛け基板５１と共に左右方向に移動する。従って、肘当て５２を左右方向に最大限移動させても、肘掛け基板５１の開口部６３が外部に露出することはなく、開口部６３に指や異物が入り込む恐れはない。
また、肘掛け支持板５０と肘掛け基板５１との左右方向の位置関係は変わらないので、肘掛け支持板５０により、肘当て５２を安定よく支持することができるとともに、肘掛け支持板５０と肘掛け基板５１とが相対的に摺動しないので、互いの当接面の摩耗を防止することができる。 At this time, as described above, the opening 63 of the armrest substrate 53 is fitted to the guide protrusion 55 of the armrest support plate 50 so as not to be relatively movable in the left-right direction. 51 and move left and right. Therefore, even if the elbow rest 52 is moved to the maximum in the left-right direction, the opening 63 of the armrest substrate 51 is not exposed to the outside, and there is no possibility that a finger or a foreign object enters the opening 63.
Moreover, since the positional relationship in the left-right direction between the armrest support plate 50 and the armrest substrate 51 does not change, the armrest support plate 50 can stably support the armrest 52, and the armrest support plate 50 and the armrest substrate 51 Since they do not slide relative to each other, it is possible to prevent wear of the contact surfaces.

図１５は、肘当て５２を、肘掛け支柱１０に対し平面視反時計方向に回動し、左右方向の向きを調節した例を示すもので、この際には、固定部材６９に対し、肘掛け支持板５０、肘掛け基板５１、下部保持部材６７および上部保持部材６８が相対的に回動する。
固定部材６９に対し上部保持部材６８が相対的に回動すると、下部保持部材６７の角孔８８に嵌合された弾性体８９により後方に付勢されている係止ピン９０が弾性係合する係合溝８７が順次１個ずつ変動し、肘当て５２の左右方向の向きが調節される。この調節は、係合溝８７の数だけ段階的に、かつ節度感をもって行うことができる。この際、肘掛け基板５１の開口部６３に、肘掛け支持板５０のガイド突部５５が、相対回動不能として嵌合されているので、肘掛け支持板５０は、肘掛け基板５１と共に回動する。従って、肘当て５２の左右方向の向きを調節しても、開口部６３が外部に露出することはなく、開口部６３に指や異物が入り込む恐れはない。また、上記と同様に、肘掛け支持板５０と肘掛け基板５１との左右方向の位置関係は変わらないので、肘当て５２を安定よく支持することができるとともに、互いの当接面の摩耗を防止することができる。 FIG. 15 shows an example in which the armrest 52 is rotated counterclockwise in a plan view with respect to the armrest column 10 and the orientation in the left-right direction is adjusted. In this case, the armrest support is supported with respect to the fixing member 69. The plate 50, the armrest substrate 51, the lower holding member 67, and the upper holding member 68 rotate relatively.
When the upper holding member 68 rotates relative to the fixing member 69, the locking pin 90 biased rearward by the elastic body 89 fitted in the square hole 88 of the lower holding member 67 is elastically engaged. The engagement grooves 87 sequentially change one by one, and the horizontal direction of the elbow rest 52 is adjusted. This adjustment can be performed stepwise and with a modest feeling by the number of the engagement grooves 87. At this time, since the guide protrusion 55 of the armrest support plate 50 is fitted in the opening 63 of the armrest substrate 51 so as not to be relatively rotatable, the armrest support plate 50 rotates together with the armrest substrate 51. Therefore, even if the left and right direction of the elbow rest 52 is adjusted, the opening 63 is not exposed to the outside, and there is no possibility that a finger or a foreign object enters the opening 63. Similarly to the above, since the horizontal positional relationship between the armrest support plate 50 and the armrest substrate 51 does not change, the armrest 52 can be stably supported and wear of the contact surfaces of each other can be prevented. be able to.

以上説明したように、上記実施形態の肘掛け装置においては、肘掛け支柱１０の上端である上部支持筒１４の上端部に固定した閉塞部材４５の上面と、肘掛け基板５１との間に、肘掛け基板５１を支持する前後および左右寸法の大きな肘掛け支持板５０を設け、この肘掛け支持板５０の上面に突設した広幅のガイド突部５５を、肘掛け基板５１に設けた広幅の前後方向を向く開口部６３に、前後方向に相対移動可能、左右方向に相対移動不能かつ相対回動不能として嵌合してあるので、肘当て５２を左右方向に移動させたり、回動させたりしても、肘掛け支持板５０により肘掛け基板５１を広い支持面積で支持することができる。
従って、肘掛け支持板５０を介して、肘当て５２を肘掛け支柱１０により安定よく支持しうるとともに、広幅の開口部６３に嵌合したガイド突部５５により肘掛け基板５１をガイドしながら、肘当て５２を前後方向に安定よく移動させることができる。特に、肘当て５２を水平回動させても、肘掛け基板５１の下面が広く支持されるので、水平回動させた状態で肘当て５２に肘を載せても、これが上下方向にぐらついたり、上向突部４７に曲げ荷重が加わったりする恐れは小さくなる。 As described above, in the armrest device of the above embodiment, the armrest substrate 51 is interposed between the upper surface of the closing member 45 fixed to the upper end portion of the upper support cylinder 14 that is the upper end of the armrest column 10 and the armrest substrate 51. An armrest support plate 50 having large front and rear and left and right dimensions is provided, and a wide guide protrusion 55 projecting from the upper surface of the armrest support plate 50 is provided with an opening 63 facing the wide front-rear direction provided on the armrest substrate 51. Furthermore, the armrest support plate can be moved in the left-right direction or rotated even if the elbow rest 52 is moved in the left-right direction. 50 can support the armrest substrate 51 with a wide support area.
Therefore, the armrest 52 can be stably supported by the armrest support 10 via the armrest support plate 50, and the armrest 52 is guided while the armrest substrate 51 is guided by the guide protrusion 55 fitted to the wide opening 63. Can be moved stably in the front-rear direction. In particular, even when the elbow rest 52 is horizontally rotated, the lower surface of the armrest substrate 51 is widely supported. Therefore, even if the elbow rests on the elbow rest 52 in a horizontally rotated state, this may wobble up and down. The possibility that a bending load is applied to the projecting portion 47 is reduced.

また、肘掛け基板５１は、前後左右寸法の大きな肘掛け支持板５０と、それに連結した下部保持部材６７とにより上下から挟持されているので、肘当て５２が上下方向にぐらつくのが防止されるとともに、いずれの方向にも安定よく移動させることができる。しかも、肘掛け支持板５０は、肘掛け基板５１と共に左右方向に移動するとともに、回動して、この肘掛け基板５１の下面を広く支持するので、肘当て５２を前後左右方向に移動させたり、水平回動させた状態で肘を載せても、肘当て５２が上下方向にぐらついたり、上向突部４７に曲げ荷重が加わったりする恐れが小さくなる。   Further, since the armrest substrate 51 is sandwiched from above and below by the armrest support plate 50 having a large front and rear left and right dimension and the lower holding member 67 connected thereto, the armrest 52 is prevented from wobbling in the vertical direction, It can be moved stably in any direction. In addition, the armrest support plate 50 moves in the left-right direction together with the armrest substrate 51 and rotates to widely support the lower surface of the armrest substrate 51. Even if the elbow is placed in a state of being moved, the possibility that the elbow rest 52 will wobble in the vertical direction or a bending load will be applied to the upward projection 47 is reduced.

さらに、肘掛け基板５１の凹部内の左右両側部に、開口部６３を挟んで対向する１対の被ガイド面６５を設け、この被ガイド面６５により、下部保持部材６７の左右両側部に設けた１対のガイド部７３を、前後方向に相対移動可能にガイドするようにしているので、肘当て５２を前後方向に安定よく移動させうるとともに、肘掛け基板５１と下部保持部材６７との接触面積および摺動抵抗が小さくなるので、肘当て５２を前後方向に円滑に移動させることができる。また、１対の被ガイド面６５を、肘掛け基板５１の凹部内に設けてあるので、高さが高くなることはない。   Further, a pair of guided surfaces 65 opposed to each other with the opening 63 interposed therebetween are provided on the left and right sides in the recess of the armrest substrate 51, and the guided surfaces 65 are provided on the left and right sides of the lower holding member 67. Since the pair of guide portions 73 are guided so as to be relatively movable in the front-rear direction, the armrest 52 can be stably moved in the front-rear direction, and the contact area between the armrest substrate 51 and the lower holding member 67 and Since sliding resistance becomes small, the elbow rest 52 can be smoothly moved in the front-rear direction. Further, since the pair of guided surfaces 65 are provided in the recesses of the armrest substrate 51, the height does not increase.

上向突部４７は、ガイド突部５５の長孔５６に嵌合され、かつガイド突部５５の上下寸法は、肘掛け基板５１の底面板５１ａの厚さとほぼ等しくしてあり、さらに、下部保持部材６７は、肘掛け基板５１の上面の凹部に、上部保持部材６８は、下部保持部材６７の上面の凹部に、固定部材６９は、下部保持部材６７の上面の凹部８２に、それぞれ収容されているので、保持手段７１を構成する部材を、肘掛け基板５１の上面の凹部内に、下位の部材から順に重ねるだけで、容易に装着しうるとともに、保持手段７１が上下複数の部材よりなるものとしても、保持手段７１の全体の高さを低く抑えることができ、肘掛け基板５１および肘掛け１１全体の上下寸法も小さくすることができる。その結果、肘掛け基板５１や肘当て５２等を成形するための材料費が節約されるとともに、肘掛け装置９の体裁がよくなる。
また、固定部材６９を下部保持部材６７の上面の凹部８２に収容し、固定部材６９の外周面と上部保持部材６８との対向面間に、係合溝８７と弾性体８９と係止ピン９０とからなる、肘掛け１１の抵抗力付与手段を設けているので、この抵抗力付与手段の高さも低く抑えることができる。 The upward protrusion 47 is fitted into the elongated hole 56 of the guide protrusion 55, and the vertical dimension of the guide protrusion 55 is substantially equal to the thickness of the bottom plate 51 a of the armrest substrate 51, and the lower holding The member 67 is accommodated in the recess on the upper surface of the armrest substrate 51, the upper holding member 68 is accommodated in the recess on the upper surface of the lower holding member 67, and the fixing member 69 is accommodated in the recess 82 on the upper surface of the lower holding member 67. Therefore, the members constituting the holding means 71 can be easily mounted by simply stacking the members constituting the holding means 71 in the recesses on the upper surface of the armrest substrate 51 in order from the lower members, and the holding means 71 may be composed of a plurality of upper and lower members. The overall height of the holding means 71 can be kept low, and the vertical dimensions of the armrest substrate 51 and the armrest 11 as a whole can also be reduced. As a result, material costs for molding the armrest substrate 51 and the armrest 52 are saved, and the appearance of the armrest device 9 is improved.
Further, the fixing member 69 is accommodated in the concave portion 82 on the upper surface of the lower holding member 67, and the engaging groove 87, the elastic body 89, and the locking pin 90 are disposed between the outer peripheral surface of the fixing member 69 and the opposing surface of the upper holding member 68. Since the resistance applying means for the armrest 11 is provided, the height of the resistance applying means can be kept low.

肘掛け支柱１０の上向突部４７は、肘掛け支持板５０に突設したガイド突部５５を介して、肘掛け基板５１の開口部６３および下部保持部材６７の嵌合孔７２に間接的に嵌合されているので、肘掛け支柱１０に対し肘当て５２を前後左右方向に移動させたり、回動させたりした際の負荷が、上向突部４７と開口部６３および嵌合孔７２との摺動部に直接加わることがなくなり、それらの接触面の摩耗が抑えられることにより、肘当て５２を長期間に亘り円滑に移動させることができる。   The upward projection 47 of the armrest column 10 is indirectly fitted into the opening 63 of the armrest substrate 51 and the fitting hole 72 of the lower holding member 67 through the guide projection 55 protruding from the armrest support plate 50. Therefore, when the elbow rest 52 is moved in the front / rear / right / left direction with respect to the armrest strut 10 or rotated, the load between the upward projection 47, the opening 63 and the fitting hole 72 slides. The elbow rest 52 can be smoothly moved over a long period of time by not being directly applied to the portion and suppressing wear on the contact surfaces.

また、肘掛け１１を左右方向に移動させる場合は、肘掛け基板５１と肘掛け支持板５０とが一体に移動するため、肘掛け支持板５０における左右方向の幅を、肘掛け基板５１の開口部６３の左右方向の幅以上、かつ肘掛け基板５１の左右の幅以下の寸法とすることにより、肘掛け１１が左右方向におけるいずれの位置にあっても、肘掛け支持板５０が、肘掛け１１の左右の外側方にはみ出すことがなく、外観を良好に保持することができる。   Further, when the armrest 11 is moved in the left-right direction, the armrest substrate 51 and the armrest support plate 50 move together, so the width in the left-right direction of the armrest support plate 50 is set to the left-right direction of the opening 63 of the armrest substrate 51. When the armrest 11 is in any position in the left-right direction, the armrest support plate 50 protrudes to the left and right outer sides of the armrest 11. The appearance can be maintained well.

なお、上記実施形態においては、第１方向及び第２方向を、水平面内において互いに直交する左右方向及び前後方向としたが、第１方向及び第２方向は、直交する二方向に限らず、互いに交差する二方向であれば任意の方向とすることができる。   In the above embodiment, the first direction and the second direction are the left-right direction and the front-rear direction orthogonal to each other in the horizontal plane, but the first direction and the second direction are not limited to the two orthogonal directions, Any two directions that intersect each other can be used.

図１６は、肘掛けの変形例を示す。なお、上記と同一の部分には、同一の符号を付けて、詳細な説明を省略する。
この肘掛け９１は、図１〜図１５(特に図２参照)に示す実施形態の肘掛け１１における第１方向とした左右方向の移動案内機構を、前後方向の移動案内機構として採用し、同じく第２方向とした前後方向の移動案内機構を、左右方向の移動案内機構として採用したものである。したがって、この変形例においても、第１方向は左右方向、第２方向は前後方向とする。 FIG. 16 shows a modification of the armrest. In addition, the same code | symbol is attached | subjected to the part same as the above, and detailed description is abbreviate | omitted.
This armrest 91 employs a left-right movement guide mechanism as the first direction in the armrest 11 of the embodiment shown in FIGS. 1 to 15 (see FIG. 2 in particular) as a front-rear movement guide mechanism. The movement guide mechanism in the front-rear direction as the direction is adopted as the movement guide mechanism in the left-right direction. Therefore, also in this modification, the first direction is the left-right direction and the second direction is the front-rear direction.

この肘掛け９１は、肘掛け支持板５０に相当する肘掛け支持板９２と、肘掛け基板５１に相当する肘掛け基板９３と、保持手段７１に相当する保持手段１０６と、肘当て５２に相当する肘当て９４とを備えている。   The armrest 91 includes an armrest support plate 92 corresponding to the armrest support plate 50, an armrest substrate 93 corresponding to the armrest substrate 51, a holding means 106 corresponding to the holding means 71, and an armrest 94 corresponding to the armrest 52. It has.

肘掛け支持板９２は、前後寸法が、肘掛け基板９３に設けた前後方向に長い開口部９５の前後寸法と、肘掛け基板９３の前後寸法との間の寸法となるようにして形成された閉塞板９６と、閉塞板９６の上面に設けられたガイド突部９７とを有している。
ガイド突部９７には、前後方向を向く長孔９８が、上下に貫通させて形成され、長孔９８の上面の開口縁には、短寸の縁片９９が上向きに突設されている。 The armrest support plate 92 is a closing plate 96 formed so that the front-rear dimension is a dimension between the front-rear dimension of the opening 95 long in the front-rear direction provided on the armrest substrate 93 and the front-rear dimension of the armrest substrate 93. And a guide protrusion 97 provided on the upper surface of the closing plate 96.
A long hole 98 facing in the front-rear direction is formed in the guide protrusion 97 so as to penetrate vertically, and a short edge piece 99 protrudes upward from the opening edge of the upper surface of the long hole 98.

肘掛け支持板９２は、ガイド突部９７の長孔９８を閉塞部材４５の上向突部４７に遊嵌することにより、前後方向に相対移動可能、左右方向に相対移動不能、かつ上向突部４７回りに水平回動可能として、閉塞部材４５の上面により支持されている。   The armrest support plate 92 is relatively movable in the front-rear direction, relatively unmovable in the left-right direction, and upwardly protruding by loosely fitting the elongated hole 98 of the guide protrusion 97 to the upward protrusion 47 of the closing member 45. It is supported by the upper surface of the closing member 45 so as to be horizontally rotatable around 47.

肘掛け基板９３における底面板１００の中央部には、前後方向を向く上記の開口部９５が形成されている。この開口部９５は、肘掛け支持板９２の閉塞板９６により常に閉塞されるようになっている。すなわち、閉塞板９６の前後及び左右寸法は、後述するように、肘掛け基板９３を、前後左右方向に最大限移動させた際でも、開口部９５全体が閉塞板９６により閉塞される大きさとされ、開口部９５に異物が入り込まないようにしてある。   In the central portion of the bottom plate 100 in the armrest substrate 93, the opening 95 is formed that faces in the front-rear direction. The opening 95 is always closed by the closing plate 96 of the armrest support plate 92. That is, the front and rear and left and right dimensions of the closing plate 96 are such that the entire opening 95 is closed by the closing plate 96 even when the armrest substrate 93 is moved to the maximum in the front and rear and left and right directions, as will be described later. Foreign matter does not enter the opening 95.

肘掛け基板９３の開口部９５を、肘掛け支持板９２のガイド突部９７に、前後方向に相対移動不能、左右方向に相対移動可能、かつ相対回動不能として嵌合することにより、肘掛け基板９３は、肘掛け支持板９２の上面に左右方向にのみ相対移動可能として支持されている。これにより、肘掛け基板９３は、肘掛け支持板９２とともに、第２方向である前後方向に移動するとともに、水平回動しうるようになっている。   By fitting the opening 95 of the armrest substrate 93 to the guide protrusion 97 of the armrest support plate 92 so as not to be relatively movable in the front-rear direction, relatively movable in the left-right direction, and not relatively rotatable, the armrest substrate 93 is The upper surface of the armrest support plate 92 is supported so as to be relatively movable only in the left-right direction. As a result, the armrest substrate 93 can move in the front-rear direction, which is the second direction, together with the armrest support plate 92, and can rotate horizontally.

肘掛け基板９３における開口部９５の前後端縁より外側には、左右の起立片１０１、１０１間において、左右方向を向くガイド片１０２、１０２が設けられ、その外面には、それぞれ内方に凹入する左右複数の係合溝１０３が形成されている。   On the outer side of the front and rear end edges of the opening 95 in the armrest substrate 93, guide pieces 102 and 102 facing left and right are provided between the left and right standing pieces 101 and 101, and the outer surfaces thereof are recessed inwardly, respectively. A plurality of left and right engaging grooves 103 are formed.

肘掛け基板９３の底面板１００の中央部上面には、下部保持部材１０４と、上部保持部材１０５と、固定部材６９と、ボルト７０からなる保持手段１０６が装着されている。
肘掛け基板９３の底面板１００の中央部上面、すなわち前後のガイド片１０２と左右の起立片１０１により囲まれた内方の凹部内において、底面板１００の上面には、肘掛け支持板９２とにより肘掛け基板９３を前後左右方向に相対移動可能に挟持する、上記の下部保持部材１０４が、左右方向に移動可能に収容されている。この下部保持部材１０４は、左右寸法を、左右の起立片１０１、１０１間の寸法よりも所要寸法小さく、かつ前後寸法を、前後に対向するガイド片１０２、１０２間の離間寸法とほぼ同等とすることにより、肘掛け基板９３に対して左右方向にのみ相対移動しうるようになっている。 A holding means 106 including a lower holding member 104, an upper holding member 105, a fixing member 69, and a bolt 70 is attached to the upper surface of the central portion of the bottom plate 100 of the armrest substrate 93.
In the upper surface of the central portion of the bottom plate 100 of the armrest substrate 93, that is, in the inner recess surrounded by the front and rear guide pieces 102 and the left and right standing pieces 101, the armrest is supported by the armrest support plate 92 on the upper surface of the bottom plate 100. The lower holding member 104 that holds the substrate 93 so as to be relatively movable in the front-rear and left-right directions is accommodated so as to be movable in the left-right direction. The lower holding member 104 has a left-right dimension that is smaller than a dimension between the left and right upright pieces 101, 101, and a front-rear dimension that is substantially the same as the distance between the front and rear guide pieces 102, 102. Thus, it can move relative to the armrest substrate 93 only in the left-right direction.

下部保持部材１０４の中央部には、前後方向を向く長方形状の凹部１０７が設けられ、凹部１０７の底面板１０８に、前後方向の嵌合孔１０９が形成され、下部保持部材１０４は、この嵌合孔１０９を、肘掛け支持板９２におけるガイド突部９７の縁片９９に嵌合させて、肘掛け基板９３の底面板１００の上面に載置されている。   A rectangular recess 107 facing in the front-rear direction is provided at the center of the lower holding member 104, and a fitting hole 109 in the front-rear direction is formed in the bottom plate 108 of the recess 107. The joint hole 109 is fitted on the edge piece 99 of the guide projection 97 in the armrest support plate 92 and placed on the upper surface of the bottom plate 100 of the armrest substrate 93.

下部保持部材１０４の左右の起立部１１０の外側面には、内方に凹入する前後複数の係合溝１１１が、それぞれ形成されている。
また、下部保持部材１０４の前後の端部には、前後のガイド片１０２に上方から係合するようにした下向き鉤形の弾性係合片１１２、１１２が設けられ、各弾性係合片１１２の下端部内面が、各ガイド片１０２に設けた複数の係合溝１０３に弾性係合しうるようになっている。 A plurality of front and rear engaging grooves 111 that are recessed inward are formed on the outer surfaces of the left and right upright portions 110 of the lower holding member 104, respectively.
Further, at the front and rear ends of the lower holding member 104, downward hooked elastic engagement pieces 112 and 112 that are engaged with the front and rear guide pieces 102 from above are provided. The inner surface of the lower end can be elastically engaged with a plurality of engaging grooves 103 provided in each guide piece 102.

下部保持部材１０４における凹部１０７の底面板１０８の上面には、上述の上部保持部材１０５が収容されている。この上部保持部材１０５の左右寸法は、下部保持部材１０４における凹部１０７の左右の内側面に摺接する寸法とされ、また前後寸法は、凹部１０７の前後の内側面の離間寸法よりも相当小としてある。これにより、上部保持部材１０５は、下部保持部材１０４に対して前後方向に相対移動可能、左右方向に相対移動不能、かつ相対回動不能となっている。   The upper holding member 105 described above is accommodated on the upper surface of the bottom plate 108 of the recess 107 in the lower holding member 104. The left and right dimensions of the upper holding member 105 are slidably in contact with the left and right inner surfaces of the recess 107 in the lower holding member 104, and the front and rear dimensions are considerably smaller than the distance between the inner surfaces of the front and rear of the recess 107. . As a result, the upper holding member 105 can move relative to the lower holding member 104 in the front-rear direction, cannot move in the left-right direction, and cannot rotate relative to the lower holding member 104.

上部保持部材１０５の左右縁における前後方向の中央部には、下向き鉤形の弾性係合片１１３、１１３が設けられ、両弾性係合片１１３、１１３の下端部の内面には、それぞれ、図１０の係合凸部８０と同様のものが突設されている。弾性係合片１１３は、上部保持部材１０５の左右の起立部１１０に、上方より嵌合されている。   At the center in the front-rear direction at the left and right edges of the upper holding member 105, downward hook-shaped elastic engagement pieces 113, 113 are provided, and the inner surfaces of the lower ends of both elastic engagement pieces 113, 113 are respectively shown in FIG. The same thing as 10 engaging convex parts 80 is protrudingly provided. The elastic engagement piece 113 is fitted to the left and right standing portions 110 of the upper holding member 105 from above.

上部保持部材１０５の中央部下面には、肘掛け支持板９２の長孔１０５の左右幅とほぼ等しい外径の筒状の嵌合突部１１４が下向きに突設され、この嵌合突部１１４を、上部保持部材１０４の嵌合孔１０９及び肘掛け支持板９２の長孔９８に摺動可能に嵌合するとともに、閉塞部材４５の上向突部４７に回動可能に嵌合することにより、上部保持部材１０５は、下部保持部材１０４の底面板１０８の上面に、下部保持部材１０４に対して前後方向に相対移動可能、かつ肘掛け支持板９２に対しては相対回動可能として載置されている。なお、嵌合突部１１４は、閉塞部材４５と上部保持部材１０５間の上下寸法を一定に保持するスペーサとしての機能を有し、嵌合突部１１４の下端を閉塞部材４５の上面に当接させることにより、下部保持部材１０４の底面板１０８の上面に、上部保持部材１０５の下面が強く当接しないようにしてある。   On the lower surface of the central portion of the upper holding member 105, a cylindrical fitting protrusion 114 having an outer diameter substantially equal to the left and right width of the elongated hole 105 of the armrest support plate 92 protrudes downward. The upper holding member 104 is slidably fitted into the fitting hole 109 of the upper holding member 104 and the long hole 98 of the armrest support plate 92, and is pivotally fitted to the upward projection 47 of the closing member 45, thereby The holding member 105 is mounted on the upper surface of the bottom plate 108 of the lower holding member 104 so as to be movable relative to the lower holding member 104 in the front-rear direction and relative to the armrest support plate 92. . The fitting protrusion 114 has a function as a spacer that keeps the vertical dimension between the closing member 45 and the upper holding member 105 constant, and the lower end of the fitting protrusion 114 is brought into contact with the upper surface of the closing member 45. By doing so, the lower surface of the upper holding member 105 is prevented from coming into strong contact with the upper surface of the bottom plate 108 of the lower holding member 104.

上部保持部材１０５の中央部上面に形成された平面視円形の凹部１１５には、円形の固定部材６９(図２参照)が、相対回動可能に収容されている。   A circular fixing member 69 (see FIG. 2) is accommodated in a circular recess 115 formed on the upper surface of the central portion of the upper holding member 105 so as to be relatively rotatable.

この肘掛け装置においては、肘当て９４を前後方向に移動させる際には、肘掛け支持板９２および下部保持部材１０４が、肘掛け基板９３と一体に移動するため、肘掛け支持板９２の閉塞板９６の前後寸法を、肘掛け基板９３の開口部９５の前後寸法以上、かつ肘掛け基板９３の前後方向の寸法以下とすることにより、常に、開口部９５全体を閉塞板９６によって閉塞することができ、開口部９５内に異物が入り込むのを防止することができる。また、閉塞板９６が、肘掛け基板９３の前後端縁から前後方向にはみ出すこともないので、外観を良好に保持することができる。   In this armrest device, when the armrest 94 is moved in the front-rear direction, the armrest support plate 92 and the lower holding member 104 move together with the armrest substrate 93, so that the front and rear of the closing plate 96 of the armrest support plate 92 are moved. By making the dimension equal to or larger than the front-rear dimension of the opening 95 of the armrest substrate 93 and smaller than the dimension of the armrest substrate 93 in the front-rear direction, the entire opening 95 can always be closed by the closing plate 96. It is possible to prevent foreign matter from entering the inside. Further, since the closing plate 96 does not protrude in the front-rear direction from the front-rear edge of the armrest substrate 93, the appearance can be maintained well.

また、肘掛け９１を、左右方向に移動させる際には、肘掛け支持板９２及び上部保持部材１０４に対して肘掛け基板９３が左右方向に相対移動するが、肘掛け基板９３の開口部９５全体が、肘掛け支持板９２の閉塞板９６により常に閉塞されているため、開口部９５に異物が入り込むのを防止することができる。   Further, when the armrest 91 is moved in the left-right direction, the armrest substrate 93 moves relative to the armrest support plate 92 and the upper holding member 104 in the left-right direction, but the entire opening 95 of the armrest substrate 93 is Since it is always closed by the closing plate 96 of the support plate 92, foreign matter can be prevented from entering the opening 95.

上記実施形態および変形例において、前後方向を第１方向、左右方向を第２方向としてもよい。   In the embodiment and the modification, the front-rear direction may be the first direction and the left-right direction may be the second direction.

１ キャスタ
２ 脚
３ 支柱
４ 座
５ 背凭れ
６ 支基
６ａ前部上面
７ 背凭れ支持杆
７ａ起立部
７ｂ前向部
７ｃ上向突片
８ 枢軸
９ 肘掛け装置
１０ 肘掛け支柱
１１ 肘掛け
１２ 下部支持杆
１２ａ起立部
１２ｂ内向部
１３ 高さ調節装置
１４ 上部支持筒
１４ａ拡大部
１４ｂ内向鍔部
１４ｃ凹入段部
１５ 内向突部
１５ａ縦溝
１６ 凹部
１７ ボルト挿通孔
１８ 凹部
１８ａ突条
１９ 雌ねじ孔
２０ ボルト
２０ａ頭部
２０ｂ軸部
２０ｃ雄ねじ部
２１ 凹入段部
２１ａ底面
２１ｂ凹孔
２２ 窓孔
２３ 係合孔
２４ 挿通孔
２５ 閉塞板
２６ 垂下側片
２７ エンドキャップ
２８ 係合孔
２９ ピン
３０ ロック部材
３０ａ胴部
３０ｂ係合突部
３０ｃ突部
３０ｄばね受け用突部
３１ 挿通孔
３２ 圧縮コイルばね
３３ 窓孔
３４ 内筒体
３４ａ拡大段部
３５ 凹入段部
３５ａ底壁
３５ｂリブ
３６ 挿通孔
３７ 縦溝
３８ Ｕ字状溝
３９ 係合孔
４０ 回動杆
４０ａ軸部
４０ｂ円板部
４０ｃ被操作部
４０ｄ当接面
４１ 凹溝
４１ａ縦溝
４１ｂ横溝
４１ｃ縦溝
４２ 連係機構
４３ 操作レバー
４３ａ操作部
４３ｂ作動部
４４ 枢軸
４５ 閉塞部材
４６ 止めねじ
４７ 上向突部
５０ 肘掛け支持板(遮蔽部材)
５０ａ閉塞板
５１ 肘掛け基板
５１ａ底面板
５２ 肘当て
５３ 貫通孔
５４ 四角ナット
５５ ガイド突部
５５ａガイド面
５６ 長孔
５７ 縁片
５８ 上向突片
５８ａ拡幅部
５９ めねじ孔
６０ 突縁
６１ 起立片
６２ リブ
６３ 開口部
６３ａ被ガイド面
６４ スリット
６５ 被ガイド面
６６ 係合溝
６７ 下部保持部材
６７ａ底面板
６７ｂ前向片
６８ 上部保持部材
６９ 固定部材
６９ａ円形突部
６９ｂ突片
７０ ボルト
７１ 保持手段
７２ 嵌合孔
７３ ガイド部
７４ ねじ
７５ 弾性係合片
７５ａ係合突部
７６ ガイド片
７７ 係合溝
７８ 突条
７９ 弾性係合片
８０ 係合突部
８１ 嵌合突部
８２ 凹部
８３ 段付嵌合孔
８４ 段部
８５ 段付き貫通孔
８６ 厚肉部
８７ 係合溝
８８ 角孔
８９ 弾性体
９０ 係止ピン
９１ 肘掛け
９２ 肘掛け支持板(遮蔽部材)
９３ 肘掛け基板
９４ 肘当て
９５ 開口部
９６ 閉塞板
９７ ガイド突部
９８ 長孔
９９ 縁片
１００ 底面板
１０１ 起立片
１０２ ガイド片
１０３ 係止溝
１０４ 下部保持部材
１０５ 上部保持部材
１０６ 保持手段
１０７ 凹部
１０８ 底面板
１０９ 嵌合孔
１１０ 起立部
１１１ 係止溝
１１２、１１３ 弾性係合片
１１４ 嵌合突部
１１５ 凹部
DESCRIPTION OF SYMBOLS 1 Caster 2 Leg 3 Post 4 Seat 5 Backrest 6 Support base 6a Front part upper surface 7 Backrest support rod 7a Standing part 7b Forward part 7c Upward projecting piece 8 Pivot 9 Armrest device 10 Armrest pillar 11 Armrest 12 Lower support collar 12a Standing portion 12b Inward portion 13 Height adjusting device 14 Upper support cylinder 14a Enlarged portion 14b Inward flange portion 14c Recessed step portion 15 Inward projecting portion 15a Vertical groove 16 Recess 17 Bolt insertion hole 18 Recess 18a ridge 19 Female screw hole 20 Bolt 20a Head portion 20b Shaft portion 20c Male thread portion 21 Recessed stepped portion 21a Bottom surface 21b Recessed hole 22 Window hole 23 Engagement hole 24 Insertion hole 25 Closure plate 26 Suspended side piece 27 End cap 28 Engagement hole 29 Pin 30 Lock member 30a Body 30b engagement protrusion 30c protrusion 30d spring receiving protrusion 31 insertion hole 32 compression coil spring 33 window hole 34 inner cylinder 34a enlarged step part 35 concave step part 35a bottom wall 5b rib 36 insertion hole 37 vertical groove 38 U-shaped groove 39 engagement hole 40 rotating rod 40a shaft portion 40b disk portion 40c operated portion 40d contact surface 41 concave groove 41a vertical groove 41b horizontal groove 41c vertical groove 42 linkage mechanism 43 Operating lever 43a Operating portion 43b Actuating portion 44 Pivot 45 Closure member 46 Set screw 47 Upward projecting portion 50 Armrest support plate (shielding member)
50a closing plate 51 armrest substrate 51a bottom plate 52 elbow pad 53 through hole 54 square nut 55 guide protrusion 55a guide surface 56 long hole 57 edge piece 58 upward protrusion piece 58a widening portion 59 female screw hole 60 protrusion edge 61 standing piece 62 Rib 63 Opening 63a Guided surface 64 Slit 65 Guided surface 66 Engaging groove 67 Lower holding member 67a Bottom plate 67b Front piece 68 Upper holding member 69 Fixing member 69a Circular projection 69b Projection piece 70 Bolt 71 Holding means 72 Fitting Joint hole 73 Guide part 74 Screw 75 Elastic engagement piece 75a Engagement protrusion 76 Guide piece 77 Engagement groove 78 Projection 79 Elastic engagement piece 80 Engagement protrusion 81 Fitting protrusion 82 Recess 83 Stepped fitting hole 84 Step portion 85 Stepped through hole 86 Thick portion 87 Engaging groove 88 Square hole 89 Elastic body 90 Locking pin 91 Armrest 92 Armrest support plate (shielding member)
93 Armrest board 94 Elbow rest 95 Opening 96 Closure plate 97 Guide projection 98 Long hole 99 Edge piece 100 Bottom plate 101 Standing piece 102 Guide piece 103 Locking groove 104 Lower holding member 105 Upper holding member 106 Holding means 107 Recessed portion 108 Bottom Face plate 109 Fitting hole 110 Standing portion 111 Locking groove 112, 113 Elastic engagement piece 114 Fitting projection 115 Recess

Claims (8)

座の外側方より起立し、かつ上端部より下方に受支面を有する肘掛け支柱と、
上面に突設した上向きのガイド突部に、上下に貫通し、かつ水平の左右方向に長い長孔が設けられ、この長孔に前記肘掛け支柱の上端部に設けられた上向突部を嵌合することにより、前記肘掛け支柱の受止面に、前記左右方向に相対移動可能として支持された肘掛け支持板と、
上下に貫通し、かつ前記左右方向と交差する水平の前後方向に長い開口部が設けられ、この開口部に前記肘掛け支持板のガイド突部を嵌合することにより、前記肘掛け支持板の上面に、前記前後方向に相対移動可能、かつ相対回動不能として支持された肘掛け基板と、
前記肘掛け支柱の前記上向突部に設けられ、かつ前記受止面との間に、前記肘掛け支持板を左右方向に、前記肘掛け基板を前後方向にそれぞれ移動可能かつ上方に移動不能として挟持する保持手段と、
この保持手段と前記肘掛け基板の上面を覆うようにして、肘掛け基板に装着した肘当て
とを備えることを特徴とする椅子の肘掛け装置。 An armrest strut standing from the outside of the seat and having a receiving surface below the upper end;
An upward guide protrusion projecting from the upper surface is provided with a long slot extending vertically and horizontally in the horizontal direction, and the upward protrusion provided at the upper end of the armrest strut is fitted into the elongated hole. By combining, on the receiving surface of the armrest strut, an armrest support plate supported to be relatively movable in the left-right direction;
A long opening is provided in the horizontal front-rear direction penetrating vertically and intersecting the left-right direction, and a guide protrusion of the armrest support plate is fitted into this opening, so that the upper surface of the armrest support plate is fitted. An armrest substrate supported as being relatively movable in the front-rear direction and being relatively unrotatable,
Provided in the upward projection of the armrest pillar, and between the supporting surface, the armrest support plate in the horizontal direction, sandwiching the immovable said armrest substrate can and upward movement respectively in the longitudinal direction Holding means;
An armrest device for a chair comprising the holding means and an armrest attached to the armrest substrate so as to cover an upper surface of the armrest substrate. 保持手段を、肘掛け基板の上面に設けた凹部内に、前後方向に相対移動可能として収容され、かつ肘掛け支柱の上向突部が左右方向に相対移動可能として挿通する嵌合孔が、ガイド突部の長孔と平行をなすように上下に重ねて設けられた下部保持部材と、この下部保持部材の上面に設けた凹部内に、左右方向に相対移動可能として収容され、かつ肘掛け支柱の上向突部が左右方向および前後方向に相対移動不能として挿通する嵌合孔が設けられた上部保持部材と、この上部保持部材の上面に設けた凹部内に収容され、かつ肘掛け支柱の上端に固着されることにより、肘掛け支持板、肘掛け基板、下部保持部材、及び上部保持部材を、肘掛け支柱の上向突部に対し抜け止めする固定部材とを備えるものとした請求項１に記載の椅子の肘掛け装置。 A fitting hole in which the holding means is accommodated in a recess provided on the upper surface of the armrest substrate so as to be relatively movable in the front-rear direction, and the upward projection of the armrest strut is relatively movable in the left-right direction is provided in the guide projection. parts and lower holding members provided one above so as to form in parallel with a longitudinal hole of the provided within the recess on the upper surface of the lower holding member, are accommodated as relatively movable in the horizontal direction, and on the armrest pillar An upper holding member provided with a fitting hole through which the projecting portion is inserted so as not to be relatively movable in the left and right direction and the front and rear direction, and is accommodated in a recess provided on the upper surface of the upper holding member and fixed to the upper end of the armrest strut The chair according to claim 1, further comprising a fixing member that prevents the armrest support plate, the armrest substrate, the lower holding member, and the upper holding member from coming off from the upward projection of the armrest column. Armrest device 下部保持部材の凹部内に、左右方向を向くガイド片を、嵌合孔を挟んで対向するようにして設け、両ガイド片に、上部保持部材の両端に外向きに突設した下向き鉤形の１対の係合片を、左右方向に相対移動可能として上方より係合し、前記上部保持部材の両端面と前記係合片とにより各ガイド片を挟んで、前記上部保持部材が下部保持部材に対して左右方向に摺動しうるようにしてなる請求項２に記載の椅子の肘掛け装置。 A guide piece facing in the left-right direction is provided in the recess of the lower holding member so as to be opposed to each other with the fitting hole interposed therebetween. A pair of engaging pieces are engaged from above so that they can be moved relative to each other in the left-right direction, and the upper holding member serves as a lower holding member, with each guide piece being sandwiched between both end faces of the upper holding member and the engaging pieces. The armrest device for a chair according to claim 2, wherein the armrest device can slide in a left-right direction with respect to the chair. 係合片を、外方に弾性変形可能とし、この係合片を、ガイド片の外面に左右方向に沿って設けた複数の係合溝に、選択的に係合しうるようにしてなる請求項３に記載の椅子の肘掛け装置。 The engaging piece can be elastically deformed outward, and the engaging piece can be selectively engaged with a plurality of engaging grooves provided on the outer surface of the guide piece along the left-right direction. Item 4. The chair armrest device according to Item 3. 肘掛け基板の凹部内に、前後方向を向く１対の被ガイド面を、開口部を挟んで互いに対向するようにして設けるとともに、この被ガイド面と対向する下部保持部材の両側部に、１対の被ガイド面を前後方向に相対移動可能にガイドするガイド部を設けてなる請求項２〜４のいずれかに記載の椅子の肘掛け装置。 A pair of guided surfaces facing in the front-rear direction are provided in the recesses of the armrest substrate so as to face each other across the opening, and a pair of guided surfaces are provided on both sides of the lower holding member facing the guided surface. The armrest device for a chair according to any one of claims 2 to 4, further comprising a guide portion that guides the guided surface of the guide member so as to be relatively movable in the front-rear direction. 被ガイド面に、複数の係合溝を前後方向に沿って設け、かつガイド部の一部に、前記複数の係合溝に選択的に係合可能な弾性係合片を設けてなる請求項５に記載の椅子の肘掛け装置。 A plurality of engagement grooves are provided on the guided surface along the front-rear direction, and an elastic engagement piece that is selectively engageable with the plurality of engagement grooves is provided on a part of the guide portion. The chair armrest device according to claim 5. ガイド突部の両側面に、互いに平行をなす前後方向を向くガイド面を設け、両ガイド面を、肘掛け基板の開口部における互いに平行をなして対向する前後方向の被ガイド面に摺接させるようにした請求項１〜６のいずれかに記載の椅子の肘掛け装置。 Guide surfaces facing in the front-rear direction parallel to each other are provided on both side surfaces of the guide protrusion, and both guide surfaces are brought into sliding contact with the guided surfaces in the front-rear direction facing each other in parallel in the opening of the armrest substrate. The armrest device for a chair according to any one of claims 1 to 6. 肘掛け支持板の前後寸法を、肘掛け支柱の上面の前後方向の長さより大とするとともに、左右寸法を、肘掛け基板の左右幅とほぼ同等としてなる請求項１〜７のいずれかに記載の椅子の肘掛け装置。   The front-rear dimension of the armrest support plate is made larger than the length in the front-rear direction of the upper surface of the armrest support column, and the left-right dimension is substantially the same as the left-right width of the armrest board. Armrest device.
JP2012105236A 2012-05-02 2012-05-02 Chair armrest equipment Active JP6045016B2 (en)

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JP6768103B2 (en) * 2019-03-07 2020-10-14 及樺實業股▲ふん▼有限公司 Angle adjuster

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JP5263823B2 (en) * 2008-09-12 2013-08-14 コクヨ株式会社 Armrest, chair

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NO20211536A1 (en) * 2021-12-17 2023-06-19 Flokk Sp Z O O Armrest structure for a chair, and chair with armrest structure
NO347537B1 (en) * 2021-12-17 2023-12-18 Flokk Sp Z O O Armrest structure for a chair, and chair with armrest structure

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