JP2006136437A - Lever device for chair and chair including the same - Google Patents

Lever device for chair and chair including the same Download PDF

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JP2006136437A
JP2006136437A JP2004327213A JP2004327213A JP2006136437A JP 2006136437 A JP2006136437 A JP 2006136437A JP 2004327213 A JP2004327213 A JP 2004327213A JP 2004327213 A JP2004327213 A JP 2004327213A JP 2006136437 A JP2006136437 A JP 2006136437A
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chair
unlocking
lever device
holding
latch mechanism
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JP4350025B2 (en
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Tetsuya Narita
哲也 成田
Yoichiro Oda
洋一郎 小田
Tatsuya Fujiwara
達也 藤原
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Nifco Inc
Okamura Corp
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Nifco Inc
Okamura Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a lever device for a chair and a chair including the same, which has a structure for suspending and holding an unlocked state of an adjustment mechanism for adjusting the position of a movable portion such as a seat body or backrest of the chair. <P>SOLUTION: An operating portion 45 is connected to a pressing mechanism of a pushrod for releasing the lock of a gas spring composing the adjustment mechanism through a wire 26 and resists urging force for holding the pushrod in a locked state. The lever device for the chair allows the adjustment of the position of the movable portion by operating the operating portion to displace the wire to an unlocking position. The lever device is provided with a latch mechanism 40 for suspending and holding the wire at the unlocking position, and the latch mechanism has a trace pin 52 supported by a case body so as to be tilted at the base end 52b, and a cam groove 41 fitting the free end 52a of the trace pin therein and having a heart shape. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、椅子の座体や背もたれなどの可動部の位置調整を行う調整機構のロックを解除する椅子用レバー装置及びこれを備えた椅子に関するものである。   The present invention relates to a chair lever device for unlocking an adjustment mechanism that adjusts the position of a movable part such as a chair body and a backrest of a chair, and a chair provided with the same.

椅子の座体や背もたれなどの可動部の位置調整を可能にした椅子が広く普及しているが、この種の椅子では、良好な座り心地を確保するために設けられるガススプリングにロック機構付きのものを採用し、平時はそのガススプリングをロック状態とすることで座体や背もたれの位置が固定されるようになっている。   Chairs that can adjust the position of movable parts such as the seat and backrest of chairs are widely used, but in this type of chair, a gas spring with a locking mechanism is installed to ensure a good seating comfort. In the normal time, the position of the seat and the backrest is fixed by locking the gas spring.

ガススプリングは、適宜な付勢力によりロック状態に保持され、座体や背もたれなどの可動部の位置調整を行う際には、座体の下側に配置された操作レバーで解除操作を行うようにしており、このとき、片方の手で操作レバーを引いた状態で残りの手で体を支えるなどして調整作業を行うものが一般的であるが、調整作業の間、操作レバーから手を離してもロック解除状態に保持されるようにすると、両手が自由になるため、調整作業が容易になる利点が得られ、このような観点から、ワイヤをロック解除位置に牽引した状態で操作レバーを停止保持させるようにしたレバー装置が知られている（特許文献１参照）。
実公平７−２１１４０号公報 The gas spring is held in a locked state by an appropriate urging force, and when adjusting the position of the movable part such as the seat and the backrest, the release operation should be performed with the operation lever located under the seat. At this time, it is common to perform adjustment work by pulling the operation lever with one hand and supporting the body with the other hand, but during the adjustment work, release the operation lever. However, if it is held in the unlocked state, both hands are freed, and the advantage of facilitating the adjustment work is obtained. From this point of view, the operation lever is pulled with the wire pulled to the unlocked position. A lever device that is stopped and held is known (see Patent Document 1).
Japanese Utility Model Publication No. 7-21140

しかしながら、前記従来の技術では、操作レバーに設けられた係止軸をグリッパに圧入固定させる構成のものであるため、十分な保持力を確保するには、グリッパの弾発係止力を大きく設定する必要があり、このために大きな操作力が必要になり、操作性の面で難点があった。   However, in the conventional technique, the locking shaft provided on the operation lever is configured to be press-fitted and fixed to the gripper. Therefore, in order to secure a sufficient holding force, the elastic locking force of the gripper is set large. For this reason, a large operating force is required, which is difficult in terms of operability.

本発明は、このような従来技術の問題点を解消するべく案出されたものであり、その主な目的は、椅子の座体や背もたれなどの可動部の位置調整を行う調整機構のロックを解除した状態に停止保持させる構成で、良好な操作性を確保することができるように構成された椅子用レバー装置及びこれを備えた椅子を提供することにある。さらに本発明は、椅子の可動部の位置調整を行う調整機構のロックを解除した状態に停止保持させる構成で生じる種々の不都合を解消することも目的としている。   The present invention has been devised to solve such problems of the prior art, and its main purpose is to lock an adjustment mechanism for adjusting the position of a movable part such as a chair seat or backrest. An object of the present invention is to provide a chair lever device configured to be able to ensure good operability with a configuration in which it is stopped and held in a released state, and a chair provided with the chair lever device. Another object of the present invention is to eliminate various inconveniences caused by the configuration in which the lock of the adjustment mechanism for adjusting the position of the movable part of the chair is released and held.

このような課題を解決するために、本発明においては、請求項１に示すとおり、椅子の可動部の位置調整を行う調整機構のロックを解除するロック解除手段（１０・２１）に連動手段（２６）を介して連結されて、前記ロック解除手段をロック状態に保持する付勢力に抗した操作部（４５）の操作により前記連動手段をロック解除位置に変位させて前記可動部の位置調整を可能にする椅子用レバー装置において、前記連動手段をロック解除位置に停止保持させるラッチ機構（４０）を備え、このラッチ機構が、基端（５２ｂ）をケース体に傾動可能に支持されたトレース部材（５２）と、このトレース部材の遊端（５２ａ）が嵌入するハート形状のカム溝（４１）とを有するものとした。   In order to solve such a problem, in the present invention, as shown in claim 1, interlock means (10 · 21) that unlocks the adjustment mechanism that adjusts the position of the movable part of the chair 26) to adjust the position of the movable part by displacing the interlocking means to the unlocking position by operating the operating part (45) against the urging force that holds the unlocking means in the locked state. A lever device for a chair, which comprises a latch mechanism (40) for stopping and holding the interlocking means in the unlocked position, and the latch mechanism is supported by the case body so that the base end (52b) can be tilted. (52) and a heart-shaped cam groove (41) into which the free end (52a) of the trace member is fitted.

これによると、いわゆるオルタネイト型のラッチ機構であり、操作部の操作によりワイヤを牽引する部材が動作するのに応じて、トレース部材の遊端がカム溝内を移動するのみであり、連動手段をロック解除位置に停止保持させる操作、並びにその位置保持状態を解除して元に戻す操作において、特に大きな操作力を必要としないため、操作性を向上させることができる。   According to this, it is a so-called alternate type latch mechanism, and the free end of the trace member only moves in the cam groove in accordance with the operation of the member pulling the wire by the operation of the operation unit, and the interlocking means is In the operation of stopping and holding at the unlocked position and the operation of releasing the position holding state and returning it to the original state, a particularly large operating force is not required, so that the operability can be improved.

また、本発明においては、請求項２に示すとおり、椅子の可動部の位置調整を行う調整機構のロックを解除するロック解除手段に連動手段を介して連結されて、前記ロック解除手段をロック状態に保持する付勢力に抗した操作部の操作により前記連動手段をロック解除位置に変位させて前記可動部の位置調整を可能にする椅子用レバー装置において、前記連動手段をロック解除位置に停止保持させるラッチ機構を備え、このラッチ機構による位置保持状態において前記操作部が初期位置に復帰するように、前記操作部が形成された操作部材（３２）が、前記ラッチ機構を構成する部材（３１）に対して所要の範囲で変位可能に設けられたものとした。   Further, in the present invention, as shown in claim 2, the lock release means is connected to the lock release means for releasing the lock of the adjustment mechanism for adjusting the position of the movable portion of the chair via the interlocking means, and the lock release means is locked. In the lever device for a chair that allows the position of the movable part to be adjusted by displacing the interlocking means to the unlocked position by operating the operating part against the urging force that is held on the lever, the interlocking means is stopped and held at the unlocked position. The operation member (32) on which the operation part is formed is configured so that the operation part is returned to the initial position in the position holding state by the latch mechanism. In contrast, it was provided to be displaceable within a required range.

これによると、ラッチ機構が位置保持状態となった後も操作部が初期位置に復帰するため、操作部が突出して調整作業の邪魔になったり、あるいは操作部に作用する外力でラッチ機構が損傷を受けることを避けることができる。   According to this, since the operation unit returns to the initial position even after the latch mechanism is in the position holding state, the operation unit protrudes and interferes with the adjustment work, or the latch mechanism is damaged by an external force acting on the operation unit. You can avoid receiving.

この場合、操作部材、並びにラッチ機構を構成するワイヤ牽引部材を、同一の支軸回りに回動可能に設けると共に、操作部材及びワイヤ牽引部材の相対変位を所要の範囲で許容する手段を、支軸を中心とする円弧状に湾曲した形状に形成されたガイド溝孔と、このガイド溝孔に嵌入する突起とで構成し、操作部材及びワイヤ牽引部材のいずれかの一方にガイド溝孔を、いずれか他方に突起を設けるようにすると良く、これにより簡易な構成で円滑な動作を確保することができる。   In this case, the operation member and the wire pulling member constituting the latch mechanism are provided so as to be rotatable around the same support shaft, and means for allowing the relative displacement between the operation member and the wire pulling member within a required range is provided. The guide groove is formed in a curved shape that is curved in an arc shape around the axis, and a protrusion that fits into the guide groove, and the guide groove is formed in one of the operation member and the wire pulling member. Protrusions may be provided on either one of the other, thereby ensuring a smooth operation with a simple configuration.

また、本発明においては、請求項３に示すとおり、可動部の位置調整を行う調整機構のロックを解除するロック解除手段に連動手段を介して連結されて、前記ロック解除手段をロック状態に保持する付勢力に抗した操作部の操作により前記連動手段をロック解除位置に変位させて前記可動部の位置調整を可能にするレバー装置を備えた椅子において、前記連動手段をロック解除位置に停止保持させるラッチ機構を備え、このラッチ機構が、基端をケース体に傾動可能に支持されたトレース部材と、このトレース部材の遊端が嵌入するハート形状のカム溝とを有するものとした。   Further, in the present invention, as shown in claim 3, the lock release means is connected to the lock release means for releasing the lock of the adjustment mechanism for adjusting the position of the movable portion through the interlocking means, and the lock release means is held in the locked state. In a chair provided with a lever device that enables the position of the movable part to be adjusted by displacing the interlocking means to the unlocked position by operating the operating part against the urging force to be held, the interlocking means is stopped and held at the unlocked position. The latch mechanism includes a trace member whose base end is supported by the case body so as to be tiltable, and a heart-shaped cam groove into which the free end of the trace member is fitted.

これによると、いわゆるオルタネイト型のラッチ機構であり、操作部の操作によりワイヤを牽引する部材が動作するのに応じて、トレース部材の遊端がカム溝内を移動するのみであり、連動手段をロック解除位置に停止保持させる操作、並びにその位置保持状態を解除して元に戻す操作において、特に大きな操作力を必要としないため、操作性を向上させることができる。   According to this, it is a so-called alternate type latch mechanism, and the free end of the trace member only moves in the cam groove in accordance with the operation of the member pulling the wire by the operation of the operation unit, and the interlocking means is In the operation of stopping and holding at the unlocked position and the operation of releasing the position holding state and returning it to the original state, a particularly large operating force is not required, so that the operability can be improved.

前記椅子においては、請求項４に示すとおり、前記可動部が、脚体（３）に対して昇降可能に設けられた座体（１）であり、前記調整機構が、前記座体の高さ位置を調整するものである構成とすることができる。また請求項５に示すとおり、前記可動部が、基体（２）に対して傾動可能に設けられた背もたれ（１３）であり、前記調整機構が、前記背もたれの角度位置を調整するものである構成とすることができる。   In the chair, as shown in claim 4, the movable portion is a seat body (1) provided so as to be movable up and down with respect to the leg body (3), and the adjustment mechanism is configured to have a height of the seat body. It can be set as the structure which adjusts a position. According to a fifth aspect of the present invention, the movable portion is a backrest (13) provided to be tiltable with respect to the base body (2), and the adjustment mechanism adjusts the angular position of the backrest. It can be.

このように本発明によれば、連動手段をロック解除位置に停止保持させる操作、並びにその位置保持状態を解除して元に戻す操作において、特に大きな操作力を必要としないため、操作性を向上させる上で大きな効果が得られる。   As described above, according to the present invention, in the operation of stopping and holding the interlocking unit at the unlocked position and the operation of releasing the position holding state and returning it to the original state, a particularly large operating force is not required, so that the operability is improved. A great effect can be obtained.

以下、本発明の実施の形態を、図面を参照しながら説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１は、本発明が適用される事務用椅子を示す模式的な側面図である。この事務用椅子では、座体１を保持する基体２が、脚体３上に設けられた脚柱４を介して鉛直線回りに回転可能に支持されており、この脚柱４は、互いに上下動可能な筒体の内部にロック機構付のガススプリング６を備え、脚体３に対して基体２を昇降可能に支持している。ガススプリング６は、シリンダ７を基体２に対して固定されると共に、ピストンロッド８を脚体３に対して固定されている。   FIG. 1 is a schematic side view showing an office chair to which the present invention is applied. In this office chair, a base body 2 that holds a seat body 1 is supported so as to be rotatable around a vertical line via a pedestal 4 provided on a leg 3, and the pedestal 4 is vertically A gas spring 6 with a lock mechanism is provided inside the movable cylinder, and the base body 2 is supported so as to be movable up and down with respect to the leg 3. The gas spring 6 has a cylinder 7 fixed to the base 2 and a piston rod 8 fixed to the leg 3.

ガススプリング６では、内部のバルブを開閉するプッシュロッド９がシリンダ７の上端から突出した状態で設けられており、このプッシュロッド９の近傍には、プッシュロッド９を押し込み動作させる押圧機構（ロック解除手段）１０が設けられている。ガススプリング６は、ばね付勢によりプッシュロッド９が突出位置にある平時には、内部のバルブが閉じてシリンダ７に対するピストンロッド８の進退を拘束するロック状態となるため、脚体３に対する基体２の昇降が不能であり、他方、押圧機構１０によりプッシュロッド９が押し込まれると、バルブが開いてシリンダ７に対するピストンロッド８の進退が許容されるロック解除状態となり、これにより脚体３に対する基体２の昇降が可能となり、座体１の高さ調整を行うことができる。   In the gas spring 6, a push rod 9 that opens and closes an internal valve is provided in a state of protruding from the upper end of the cylinder 7, and a push mechanism (lock release) that pushes the push rod 9 in the vicinity of the push rod 9. Means) 10 is provided. The gas spring 6 is in a locked state in which the internal valve is closed and the piston rod 8 moves forward and backward with respect to the cylinder 7 when the push rod 9 is in the projecting position due to the spring bias. On the other hand, when the push rod 9 is pushed by the pressing mechanism 10, the valve is opened and the piston rod 8 is allowed to move forward and backward with respect to the cylinder 7. It is possible to move up and down, and the height of the seat body 1 can be adjusted.

またこの事務用椅子では、背もたれ１３を保持する背フレーム１４が、基体２に対して支軸１５を介して前後に傾動可能に支持されており、背フレーム１４の下部には、ロック機構付のガススプリング１７が設けられており、このガススプリング１７は、シリンダ１８を基体２に対して固定されると共に、ピストンロッド１９を背フレーム１４に対して固定されている。   Further, in this office chair, a back frame 14 that holds the backrest 13 is supported so as to be tiltable back and forth with respect to the base 2 via a support shaft 15. A gas spring 17 is provided. The gas spring 17 fixes the cylinder 18 to the base 2 and the piston rod 19 to the back frame 14.

ガススプリング１７では、ピストンロッド１９の先端部からプッシュロッド２０が突出した状態で設けられており、このプッシュロッド２０の近傍に、プッシュロッド２０を押し込み動作させる押圧機構（ロック解除手段）２１が設けられている。このガススプリング１７も、前記のガススプリング６と同様、プッシュロッド２０が突出位置にある平時にはロック状態となるため、基体２に対する背フレーム１４の傾動が不能であり、押圧機構２１によりプッシュロッド２０が押し込まれるとロック解除状態となり、これにより基体２に対する背フレーム１４の傾動が可能となり、背もたれ１３の角度調整を行うことができる。   The gas spring 17 is provided with the push rod 20 protruding from the tip of the piston rod 19, and a pressing mechanism (lock releasing means) 21 that pushes the push rod 20 is provided in the vicinity of the push rod 20. It has been. Similarly to the gas spring 6, the gas spring 17 is also locked when the push rod 20 is in the protruding position, so that the back frame 14 cannot be tilted with respect to the base 2, and the push mechanism 20 is pushed by the pressing mechanism 21. Is pushed into the unlocked state, whereby the back frame 14 can be tilted with respect to the base 2 and the angle of the backrest 13 can be adjusted.

図２は、図１に示した事務用椅子の模式的な上面図である。この事務用椅子では、座体の下側に、本発明によるレバー装置２５が配置されている。これらのレバー装置２５はそれぞれ、座体１の高さ調整用のガススプリング６に対応する押圧機構１０、並びに背もたれ１３の角度調整用のガススプリング１７に対応する押圧機構２１にワイヤ（連動手段）２６を介して連結されており、レバー装置２５をそれぞれ操作すると、ワイヤ２６が牽引されて押圧機構１０・２１がガススプリング６・１７の各プッシュロッドを押し込み動作させ、座体１の高さ調整並びに背もたれ１３の角度調整を行うことができる。   FIG. 2 is a schematic top view of the office chair shown in FIG. In this office chair, the lever device 25 according to the present invention is disposed below the seat body. These lever devices 25 are respectively wired to the pressing mechanism 10 corresponding to the gas spring 6 for adjusting the height of the seat body 1 and the pressing mechanism 21 corresponding to the gas spring 17 for adjusting the angle of the backrest 13 to each other. When the lever device 25 is operated, the wire 26 is pulled, and the pressing mechanisms 10 and 21 push the push rods of the gas springs 6 and 17 to adjust the height of the seat body 1. In addition, the angle of the backrest 13 can be adjusted.

図３は、図２に示したレバー装置を詳しく示す断面図であり、動作状況を段階的に示している。このレバー装置２５は、ワイヤ２６の末端が連結されるワイヤ牽引部材３１と、ワイヤ２６を牽引する向きにワイヤ牽引部材３１を動作させる操作部材３２と、ワイヤ牽引部材３１及び操作部材３２を回動可能に支持するケース体３３とを有している。ケース体３３は、図２に示したように、座体１の下側で基体２の適所に固定される。   FIG. 3 is a cross-sectional view showing the lever device shown in FIG. 2 in detail, and shows the operation status step by step. The lever device 25 includes a wire pulling member 31 to which the end of the wire 26 is coupled, an operation member 32 that operates the wire pulling member 31 in a direction in which the wire 26 is pulled, and the wire pulling member 31 and the operation member 32 are rotated. It has a case body 33 that supports it. As shown in FIG. 2, the case body 33 is fixed to an appropriate position of the base body 2 below the seat body 1.

図４は、図３に示したワイヤ牽引部材及び操作部材を分解して示す斜視図である。ワイヤ牽引部材３１は、支軸３５が挿通される軸受け部３６と、ワイヤ２６の末端の係止球３７を保持するワイヤ係止部３８と、後に詳述するようにワイヤ２６をロック解除位置に停止保持するためのラッチ機構４０を構成するカム溝４１が形成された扇形状部４２とを有しており、合成樹脂材の射出成形により一体に形成されたものである。   FIG. 4 is an exploded perspective view showing the wire pulling member and the operation member shown in FIG. The wire pulling member 31 includes a bearing portion 36 through which the support shaft 35 is inserted, a wire locking portion 38 that holds a locking ball 37 at the end of the wire 26, and the wire 26 in the unlocked position as will be described in detail later. It has a fan-shaped portion 42 formed with a cam groove 41 that constitutes a latch mechanism 40 for stopping and holding, and is integrally formed by injection molding of a synthetic resin material.

操作部材３２は、下面側に手指を掛けて引き上げ操作可能な操作部４５と、支軸３５回りに回動可能に設けられると共にワイヤ牽引部材３１に対して係合する連結板部４６とを有しており、合成樹脂材の射出成形により一体に形成されたものである。連結板部４６は、ワイヤ牽引部材３１を挟み込むように一対設けられており、ワイヤ牽引部材３１の軸受け部３６の軸方向の端部に嵌合する円孔４７、並びにワイヤ牽引部材３１に設けられた突起４８が嵌合する長孔４９が開設されている。ワイヤ牽引部材３１の突起４８は、支軸３５の軸線方向の両側に突出形成されており、一対の連結板部４６の各長孔４９に内側から嵌入する。またワイヤ牽引部材３１の軸受け部３６には、軸方向の両端に縮径部５０が形成されており、この縮径部５０が一対の連結板部４６の各円孔４７に内側から嵌入する。   The operation member 32 has an operation portion 45 that can be pulled up by placing a finger on the lower surface side, and a connecting plate portion 46 that is rotatably provided around the support shaft 35 and engages with the wire pulling member 31. And formed integrally by injection molding of a synthetic resin material. A pair of connecting plate portions 46 are provided so as to sandwich the wire pulling member 31, and are provided in the circular hole 47 that fits in the axial end of the bearing portion 36 of the wire pulling member 31 and the wire pulling member 31. A long hole 49 into which the protrusion 48 is fitted is formed. The protrusions 48 of the wire pulling member 31 are formed so as to protrude on both sides in the axial direction of the support shaft 35 and are fitted into the long holes 49 of the pair of connecting plate portions 46 from the inside. Further, the bearing portion 36 of the wire pulling member 31 is formed with reduced diameter portions 50 at both ends in the axial direction, and the reduced diameter portions 50 are fitted into the respective circular holes 47 of the pair of connecting plate portions 46 from the inside.

長孔４９は、支軸３５を中心とする円弧状に湾曲した形状に形成され、ワイヤ牽引部材３１の突起４８が所定の角度範囲で自由に相対移動可能となっており、図３（Ａ）に示すように、ワイヤ牽引部材３１がワイヤ２６をロック位置とする状態では、長孔４９の端に突起４８が位置するため、引き上げ操作による操作部材３２の回動に応じてワイヤ牽引部材３１が回動してワイヤ２６を牽引することができる。   The long hole 49 is formed in an arcuate shape centered on the support shaft 35, and the protrusion 48 of the wire pulling member 31 can be freely moved relatively within a predetermined angular range. FIG. As shown in FIG. 4, in the state where the wire pulling member 31 has the wire 26 in the locked position, the projection 48 is positioned at the end of the long hole 49, so that the wire pulling member 31 is rotated according to the rotation of the operation member 32 by the pulling operation. The wire 26 can be pulled by rotating.

そして、操作部材３２を引き上げ操作することにより、図３（Ｂ）に示すように、ワイヤ牽引部材３１がワイヤ２６をロック解除位置に停止保持する位置に変位した状態では、長孔４９によりワイヤ牽引部材３１の突起４８で操作部材３２の降下方向の回動が阻止されないため、図３（Ｃ）に示すように、操作部材３２を図３（Ａ）の状態と同様の初期位置に復帰させることができる。   Then, by pulling up the operating member 32, as shown in FIG. 3B, the wire pulling member 31 is pulled by the long hole 49 in a state where the wire pulling member 31 is displaced to a position where the wire 26 is stopped and held at the unlocking position. Since the protrusion 48 of the member 31 does not prevent the operation member 32 from rotating in the downward direction, the operation member 32 is returned to the initial position similar to the state of FIG. 3A as shown in FIG. Can do.

図５は、図３に示したラッチ機構を分解して詳しく示す斜視図である。このラッチ機構４０は、ワイヤ牽引部材３１の側面に形成されたカム溝４１と、このカム溝４１に先端部５２ａが嵌入するトレースピン（トレース部材）５２と、このトレースピン５２を外側から押圧してカム溝４１の底面に先端部５２ａが常時当接した状態に保持する板ばね５３とからなっている。   FIG. 5 is an exploded perspective view showing the latch mechanism shown in FIG. 3 in detail. The latch mechanism 40 includes a cam groove 41 formed on the side surface of the wire pulling member 31, a trace pin (trace member) 52 into which the tip 52 a is fitted in the cam groove 41, and presses the trace pin 52 from the outside. And a leaf spring 53 that holds the tip 52a in a state of always contacting the bottom surface of the cam groove 41.

トレースピン５２は、基端部５２ｂをケース体３３側の取付孔に嵌合させてケース体３３に回動可能に取り付けられ、このトレースピン５２の離脱を阻止する態様で板ばね５３がねじ５４でケース体３３に固定される。   The trace pin 52 is rotatably attached to the case body 33 by fitting the base end portion 52b into the attachment hole on the case body 33 side, and the leaf spring 53 is screwed in a manner that prevents the trace pin 52 from being detached. Thus, the case body 33 is fixed.

カム溝４１は、往路部５５及び復路部５６が、ハート形状の外径輪郭を有するハート島５７を取り囲むように設けられており、ハート島５７の凸部に対応する第１の係止部５９と、ハート島５７の凹部に対応する第２の係止部６０と、往路側並びに復路側のスイッチバック部６１・６２とを有している。カム溝４１の底面には適所にトレースピン５２の先端部５２ａが逆方向へ移動することを阻止する段差が設けられている。   The cam groove 41 is provided so that the forward path portion 55 and the return path portion 56 surround the heart island 57 having a heart-shaped outer diameter contour, and the first locking portion 59 corresponding to the convex portion of the heart island 57. And a second locking portion 60 corresponding to the concave portion of the heart island 57 and switchback portions 61 and 62 on the forward side and the return side. On the bottom surface of the cam groove 41, a step is provided to prevent the tip 52a of the trace pin 52 from moving in the opposite direction.

ワイヤ牽引部材３１がワイヤ２６をロック位置とする状態（図３（Ａ）参照）では、トレースピン５２の先端部５２ａがカム溝４１の第１の係止部５９に位置し、この状態では、トレースピン５２の先端部５２ａが復路部５６へ進入することが段差で規制されるため、操作部材３２の引き上げ操作が行われると、トレースピン５２の先端部５２ａは往路部５５に進入する。そしてトレースピン５２の先端部５２ａが往路側のスイッチバック部６１に到達したところで先端部５２ａの移動が規制されてワイヤ牽引部材３１の回動が阻止される（図３（Ｂ）参照）。   In the state where the wire pulling member 31 has the wire 26 in the locked position (see FIG. 3A), the tip end portion 52a of the trace pin 52 is positioned at the first locking portion 59 of the cam groove 41. Since the step of the tip 52a of the trace pin 52 entering the return path 56 is restricted by the step, the tip 52a of the trace pin 52 enters the forward path 55 when the operation member 32 is pulled up. Then, when the tip 52a of the trace pin 52 reaches the switchback 61 on the forward path side, the movement of the tip 52a is restricted and the rotation of the wire pulling member 31 is prevented (see FIG. 3B).

この状態では、トレースピン５２の先端部５２ａが往路部５５へ戻ることが段差で規制されるため、操作部材３２の引き上げ操作をやめると、ワイヤ２６に引っ張られてワイヤ牽引部材３１が回動するのに伴って、トレースピン５２の先端部５２ａは第２の係止部６０側に進入し、トレースピン５２の先端部５２ａが第２の係止部６０に到達したところで先端部５２ａの移動が規制されてワイヤ牽引部材３１の回動が阻止され、ワイヤ２６をロック解除位置に停止保持する状態となる（図３（Ｃ）参照）。   In this state, the step is regulated by the step so that the tip 52a of the trace pin 52 returns to the forward path portion 55. Therefore, when the pulling-up operation of the operation member 32 is stopped, the wire pulling member 31 is pulled by being pulled by the wire 26. Accordingly, the tip 52a of the trace pin 52 enters the second locking portion 60 side, and the tip 52a moves when the tip 52a of the trace pin 52 reaches the second locking portion 60. As a result, the wire pulling member 31 is prevented from rotating, and the wire 26 is stopped and held at the unlocked position (see FIG. 3C).

この状態では、トレースピン５２の先端部５２ａが往路側のスイッチバック部６１へ戻ることが段差で規制されるため、操作部材３２の引き上げ操作が行われると、トレースピン５２の先端部５２ａは復路側のスイッチバック部６２に進入する。そしてこの復路側のスイッチバック部６２でワイヤ牽引部材３１の回動が阻止されたところで先端部５２ａの移動が規制されてワイヤ牽引部材３１の回動が阻止される。   In this state, the step 52 restricts the tip 52a of the trace pin 52 from returning to the switchback portion 61 on the forward path side, so that when the operation member 32 is pulled up, the tip 52a of the trace pin 52 returns. The switchback unit 62 on the side is entered. When the turnback of the wire pulling member 31 is prevented by the switchback portion 62 on the return path side, the movement of the distal end portion 52a is restricted and the rotation of the wire pulling member 31 is blocked.

この状態では、トレースピン５２の先端部５２ａが第２の係止部６０側に戻ることが段差で規制されるため、操作部材３２の引き上げ操作をやめると、ワイヤ２６に引っ張られてワイヤ牽引部材３１が回動するのに伴って、トレースピン５２の先端部５２ａは復路部５６に進入して第１の係止部５９に到達し、ワイヤ牽引部材３１がワイヤ２６をロック位置とする元の状態に戻る。   In this state, because the step 52 restricts the tip 52a of the trace pin 52 from returning to the second locking portion 60, when the operation member 32 is lifted, the wire 26 is pulled by the wire 26. As the pin 31 rotates, the tip 52a of the trace pin 52 enters the return path 56 and reaches the first locking portion 59, and the wire pulling member 31 sets the wire 26 to the lock position. Return to state.

本発明にかかる椅子用レバー装置は、椅子の座体や背もたれなどの可動部の位置調整を行う調整機構のロックを解除する用途に有用である。また、本発明にかかる椅子は、前記のように事務用椅子などとして有用である。なお、レバー装置は、前記のように座体の高さ調整や背もたれの角度調整の用途の他、座体の角度や前後位置の調整、あるいは肘掛けの高さ調整など、椅子の可動部の多様な位置調整の用途に広く適用することができる。   The lever device for a chair according to the present invention is useful for unlocking an adjustment mechanism that adjusts the position of a movable part such as a chair body or a backrest of the chair. Moreover, the chair concerning this invention is useful as an office chair etc. as mentioned above. In addition to the use of adjusting the height of the seat and the angle of the backrest as described above, the lever device can be used for various movable parts of the chair, such as adjusting the angle of the seat, the front and rear position, or the height of the armrest. Therefore, it can be widely applied to various uses for position adjustment.

本発明が適用される事務用椅子を示す模式的な側面図。The typical side view showing the office chair to which the present invention is applied. 図１に示した事務用椅子の模式的な上面図。The typical top view of the office chair shown in FIG. 図２に示したレバー装置を詳しく示す断面図。Sectional drawing which shows the lever apparatus shown in FIG. 2 in detail. 図３に示したワイヤ牽引部材及び操作部材を分解して示す斜視図。The perspective view which decomposes | disassembles and shows the wire pulling member and operation member which were shown in FIG. 図３に示したラッチ機構を分解して詳しく示す斜視図。FIG. 4 is an exploded perspective view showing the latch mechanism shown in FIG. 3 in detail.

符号の説明Explanation of symbols

１ 座体
２ 基体
３ 脚体
６ ガススプリング
９・２０ プッシュロッド
１０・２１ 押圧機構（ロック解除手段）
１３ 背もたれ
２５ レバー装置
２６ ワイヤ（連動手段）
３１ ワイヤ牽引部材
３２ 操作部材
４０ ラッチ機構
４１ カム溝
４５ 操作部
５２ トレースピン（トレース部材）、５２ａ 先端部、５２ｂ 基端部 DESCRIPTION OF SYMBOLS 1 Seat body 2 Base body 3 Leg body 6 Gas spring 9,20 Push rod 10,21 Pressing mechanism (lock release means)
13 Backrest 25 Lever device 26 Wire (interlocking means)
31 Wire pulling member 32 Operation member 40 Latch mechanism 41 Cam groove 45 Operation part 52 Trace pin (trace member), 52a Tip part, 52b Base end part

Claims (5)

椅子の可動部の位置調整を行う調整機構のロックを解除するロック解除手段に連動手段を介して連結されて、前記ロック解除手段をロック状態に保持する付勢力に抗した操作部の操作により前記連動手段をロック解除位置に変位させて前記可動部の位置調整を可能にする椅子用レバー装置であって、
前記連動手段をロック解除位置に停止保持させるラッチ機構を備え、このラッチ機構が、基端をケース体に傾動可能に支持されたトレース部材と、このトレース部材の遊端が嵌入するハート形状のカム溝とを有するものであることを特徴とする椅子用レバー装置。 It is connected to the unlocking means for releasing the lock of the adjusting mechanism for adjusting the position of the movable part of the chair through the interlocking means, and the operation part is operated by operating the operating part against the urging force for holding the unlocking means in the locked state. A lever device for a chair that displaces the interlocking means to the unlocked position to enable position adjustment of the movable part,
A latch mechanism for stopping and holding the interlocking means at the unlocking position is provided, and the latch mechanism is supported by a trace member whose base end is tiltably supported by the case body, and a heart-shaped cam into which the free end of the trace member is fitted. A lever device for a chair having a groove. 椅子の可動部の位置調整を行う調整機構のロックを解除するロック解除手段に連動手段を介して連結されて、前記ロック解除手段をロック状態に保持する付勢力に抗した操作部の操作により前記連動手段をロック解除位置に変位させて前記可動部の位置調整を可能にする椅子用レバー装置であって、
前記連動手段をロック解除位置に停止保持させるラッチ機構を備え、このラッチ機構による位置保持状態において前記操作部が初期位置に復帰するように、前記操作部が形成された操作部材が、前記ラッチ機構を構成する部材に対して所要の範囲で変位可能に設けられたことを特徴とする椅子用レバー装置。 It is connected to the unlocking means for releasing the lock of the adjusting mechanism for adjusting the position of the movable part of the chair through the interlocking means, and the operation part is operated by operating the operating part against the urging force for holding the unlocking means in the locked state. A lever device for a chair that displaces the interlocking means to the unlocked position to enable position adjustment of the movable part,
A latch mechanism that stops and holds the interlocking unit at the unlocked position, and the operation member formed with the operation unit is configured to include the latch mechanism so that the operation unit returns to the initial position in a position holding state by the latch mechanism; A lever device for a chair, characterized in that it is provided so as to be displaceable within a required range with respect to the members constituting. 可動部の位置調整を行う調整機構のロックを解除するロック解除手段に連動手段を介して連結されて、前記ロック解除手段をロック状態に保持する付勢力に抗した操作部の操作により前記連動手段をロック解除位置に変位させて前記可動部の位置調整を可能にするレバー装置を備えた椅子であって、
前記連動手段をロック解除位置に停止保持させるラッチ機構を備え、このラッチ機構が、基端をケース体に傾動可能に支持されたトレース部材と、このトレース部材の遊端が嵌入するハート形状のカム溝とを有するものであることを特徴とする椅子。 The interlocking means is connected to an unlocking means for unlocking an adjusting mechanism for adjusting the position of the movable part via an interlocking means, and the interlocking means is operated by an operation unit against an urging force for holding the unlocking means in a locked state. A chair provided with a lever device that allows the movable part to be adjusted by displacing the lock to the unlocking position,
A latch mechanism for stopping and holding the interlocking means at the unlocking position is provided, and the latch mechanism is supported by a trace member whose base end is tiltably supported by the case body, and a heart-shaped cam into which the free end of the trace member is fitted. A chair having a groove. 前記可動部が、脚体に対して昇降可能に設けられた座体であり、前記調整機構が、前記座体の高さ位置を調整するものであることを特徴とする請求項３に記載の椅子。   The said movable part is a seat provided so that raising / lowering was possible with respect to the leg body, and the said adjustment mechanism adjusts the height position of the said seat body, The Claim 3 characterized by the above-mentioned. Chair. 前記可動部が、基体に対して傾動可能に設けられた背もたれであり、前記調整機構が、前記背もたれの角度位置を調整するものであることを特徴とする請求項３若しくは請求項４に記載の椅子。   The said movable part is a backrest provided so that inclination with respect to the base | substrate was possible, and the said adjustment mechanism adjusts the angular position of the said backrest, The Claim 3 or Claim 4 characterized by the above-mentioned. Chair.
JP2004327213A 2004-11-11 2004-11-11 Lever device for chair and chair provided with the same Active JP4350025B2 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007330364A (en) * 2006-06-13 2007-12-27 Okamura Corp Control lever device of chair
JP2008049078A (en) * 2006-08-28 2008-03-06 Kokuyo Co Ltd Chair
JP2008049079A (en) * 2006-08-28 2008-03-06 Kokuyo Co Ltd Rocking mechanism and chair
WO2013065815A1 (en) 2011-11-04 2013-05-10 株式会社岡村製作所 Chair
CN105476315A (en) * 2015-12-15 2016-04-13 浙江安吉祥泰家具有限公司 Improved chair tray

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007330364A (en) * 2006-06-13 2007-12-27 Okamura Corp Control lever device of chair
JP2008049078A (en) * 2006-08-28 2008-03-06 Kokuyo Co Ltd Chair
JP2008049079A (en) * 2006-08-28 2008-03-06 Kokuyo Co Ltd Rocking mechanism and chair
WO2013065815A1 (en) 2011-11-04 2013-05-10 株式会社岡村製作所 Chair
CN105476315A (en) * 2015-12-15 2016-04-13 浙江安吉祥泰家具有限公司 Improved chair tray
CN105476315B (en) * 2015-12-15 2018-03-23 浙江安吉祥泰家具有限公司 A kind of improved chair tray

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