JP2011092244A - Reversible type rotation transmission mechanism and movable structure of chair using the same - Google Patents

Reversible type rotation transmission mechanism and movable structure of chair using the same Download PDF

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JP2011092244A
JP2011092244A JP2009246325A JP2009246325A JP2011092244A JP 2011092244 A JP2011092244 A JP 2011092244A JP 2009246325 A JP2009246325 A JP 2009246325A JP 2009246325 A JP2009246325 A JP 2009246325A JP 2011092244 A JP2011092244 A JP 2011092244A
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fixed
lock
drive gear
seat
key
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JP5498125B2 (en
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Toshiyuki Horiki
敏幸 堀木
Kazuyuki Ito
和幸 伊藤
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Takano Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To continuously execute releasing of lock and driving rotation of a pinion by one action rotating an operation section and to rotate in both directions by a lock pawl automatically biting into the pinion when stopping rotation input by an operation section. <P>SOLUTION: In reversible type rotation transmission mechanism, a driving gear 4 has key grooves 7 forming a space (a play) where a coupling key 6 of a rotary shaft 5 hollowly rotates in a certain range, the rotary shaft is interlocked with the driving gear 4 after only the rotary shaft 5 hollowly rotates in the certain range, at least a lock releasing key 12 pushes either one of lock members in a lock releasing direction, a lock pawl is released from the driving gear 4, and the driving gear interlocked with the rotary shaft via the coupling key becomes able to rotate when the coupling key 6 of the rotary shaft 5 hollowly rotates in the inside space of the key grooves 7 and comes into contact with one side walls 7a of the key grooves 7. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、可逆式回転伝達機構及びそれを用いた椅子の可動構造物に関する。さらに詳述すると、本発明は、被駆動側部材側からの入力では駆動側部材を駆動することはできず、駆動側部材側から入力される場合には被駆動部材を任意の方向に送りを与えることが可能な可逆式回転伝達機構及びそれを用いた椅子の座や背あるいは肘掛けなどの可動構造物に関する。   The present invention relates to a reversible rotation transmission mechanism and a movable structure of a chair using the same. More specifically, in the present invention, the drive side member cannot be driven by the input from the driven side member side, and when the input is from the drive side member side, the driven member is fed in an arbitrary direction. The present invention relates to a reversible rotation transmission mechanism that can be applied and a movable structure such as a seat, back, or armrest of a chair using the same.

可動構造物の駆動源として、ピニオンとラックの組み合わせを用いて回転運動を直線運動に変換する機構（非特許文献１）が用いられることがある。この機構はピニオンの回転によりラックを直線運動させるものであるため、ピニオンの回転方向を切り替えることによりラックの直線運動方向を切り替えることができる。したがって、ラック側から直線運動を入力することによってもピニオンの回転による回転運動を出力することができる。また、一方向クラッチ機構と呼ばれる逆転を防止しつつ一方向にのみ回転運動を直線運動に変換する機構もあるが、この機構の場合にも、回転が許容される方向にラック側から入力があるときにはピニオン側が回転し運動を伝達する。そこで、スライド機構において可動構造物を任意の位置に固定する必要がある場合には、一方向回転クラッチを用いると共に可動構造物の固定を行うためのロック機構を別途必要とする（特許文献１）。   As a drive source for the movable structure, a mechanism (Non-Patent Document 1) that converts rotational motion into linear motion using a combination of a pinion and a rack may be used. Since this mechanism linearly moves the rack by the rotation of the pinion, the linear movement direction of the rack can be switched by switching the rotation direction of the pinion. Therefore, the rotational motion due to the rotation of the pinion can also be output by inputting a linear motion from the rack side. There is also a mechanism called a one-way clutch mechanism that converts rotational motion into linear motion only in one direction while preventing reverse rotation. In this case, there is input from the rack side in the direction in which rotation is allowed. Sometimes the pinion side rotates and transmits motion. Therefore, when it is necessary to fix the movable structure to an arbitrary position in the slide mechanism, a one-way rotation clutch is used and a lock mechanism for fixing the movable structure is separately required (Patent Document 1). .

また、椅子の座のスライド機構におけるロック機構としては、例えば特許文献２に示すようなものがある。この固定機構は、被駆動部材側に凹凸を設けてそれに嵌合する突起を固定部材側に被駆動部材の移動軌跡上に出没自在に備え、被駆動部材をスライドさせる際には突起を移動軌跡から退避するように没入させ、固定したいときには移動軌跡に突起を突出させて被駆動部材側の凹凸と嵌合させて被駆動部材の動きを阻止するようにしたものである。   Moreover, as a lock mechanism in the slide mechanism of a chair seat, there exists a thing as shown in patent document 2, for example. This fixing mechanism is provided with protrusions and recesses on the driven member side, and a protrusion that fits on the driven member side can be projected and retracted on the movement track of the driven member on the fixed member side, and when the driven member is slid, the protrusion is moved. When it is desired to be retracted and fixed, a protrusion is projected on the movement locus and fitted with the unevenness on the driven member side to prevent the driven member from moving.

特開平０７−２５１９６４号公報Japanese Patent Application Laid-Open No. 07-251964 特開２００８−４９０７７号公報JP 2008-49077 A

技報堂出版株式会社 昭和３２年１０月１５日発行 芦葉清三郎著 機械運動機構第２９頁134．ピニオンとラックGihodo Publishing Co., Ltd., issued October 15, 1957, by Saburo Kiyosaburo, Machine Movement Organization, page 29, 134. Pinion and rack

しかしながら、ピニオンとラックの組み合わせを用いた可逆式回転伝達機構の場合、被駆動部材・可動部材を任意位置で固定するには被駆動部材・可動部材の動きを固定するロック機構を別途必要とし、それぞれの機構を各々別々に操作する必要がある。例えば、スライダ機構にピニオンとラックの組み合わせを用いた可逆式回転伝達機構を適用する場合には、ロック機構を解除してスライダ機構を自由に摺動可能な状態としてからピニオンを回転させて可動部材を任意の方向に移動させる２操作を必要とする。   However, in the case of a reversible rotation transmission mechanism using a combination of a pinion and a rack, in order to fix the driven member / movable member at an arbitrary position, a lock mechanism for fixing the movement of the driven member / movable member is separately required. Each mechanism must be operated separately. For example, when a reversible rotation transmission mechanism using a combination of a pinion and a rack is applied to the slider mechanism, the lock mechanism is released to make the slider mechanism freely slidable, and then the pinion is rotated to move the movable member. Two operations are required to move the in any direction.

また、駆動機構とロック機構とを別々に構成する場合、それぞれの機構を操作するための操作レバーを必要とするため、部品点数も多くなると共にそれぞれの機構を配置するスペースを余分に必要とする。   Further, when the drive mechanism and the lock mechanism are configured separately, an operation lever for operating each mechanism is required, so that the number of parts is increased and an extra space for arranging each mechanism is required. .

さらに、一方向回転クラッチを用いる場合には、駆動側部材の回転方向には関係なく被駆動部材・可動部材を一定回転方向・移動方向に駆動させるには十分であるが、双方向に回転可能としながら逆転防止を図ることはできない。   Furthermore, when using a one-way rotation clutch, it is sufficient to drive the driven member / movable member in a constant rotation direction / movement direction regardless of the rotation direction of the driving side member, but it can rotate in both directions. However, it is impossible to prevent reversal.

本発明は、操作部を回転させるという１つの動作でロックの解除とピニオンの駆動回転とを連続して実行可能であり、かつ操作部による回転入力を止めると自動的にピニオンにロック爪が食い込んで双方向に回転不能とされる可逆式回転伝達機構及びそれを用いた椅子の可動構造物を提供することを目的とする。   According to the present invention, the unlocking and the drive rotation of the pinion can be continuously executed by one operation of rotating the operation unit, and the lock pawl automatically bites into the pinion when the rotation input by the operation unit is stopped. It is an object of the present invention to provide a reversible rotation transmission mechanism that cannot rotate in both directions and a movable structure of a chair using the same.

かかる目的を達成するために請求項１記載の可逆式回転運動伝達機構は、回転シャフトと、該回転シャフトと連結キーを介して回転方向にのみ係合する駆動ギアと、この駆動ギアに向けて常時付勢され前記駆動ギアの歯に噛み合って前記駆動ギアの回転を一方向にのみ阻止するロック爪を備える一対のロック部材と、前記回転シャフトと摩擦力により一定範囲で連動回転し一対の前記ロック部材のうち回転方向に対して回転を阻止する部材となる一方のロック部材を解除するロック解除キーと、これらを支持する支持フレームとを備え、前記駆動ギアは前記回転シャフトの前記連結キーが一定の範囲内で空転するための空間（遊び）を形成するキー溝を有し、前記回転シャフトだけが一定範囲において空転した後に前記駆動ギアと連係するように設けられ、前記回転シャフトの前記連結キーが前記キー溝の内部空間を空転して前記キー溝の一方の側壁に当接したときには、少なくとも前記ロック解除キーがいずれか一方のロック部材をロック解除方向に押して前記駆動ギアから前記ロック爪を離脱させた状態となり、前記連結キーを介して前記回転シャフトと連係された前記駆動ギアが回転可能となるように設けられている。   In order to achieve this object, a reversible rotary motion transmission mechanism according to claim 1 is provided with a rotary shaft, a drive gear that engages with the rotary shaft only in the rotational direction via a connecting key, and the drive gear. A pair of lock members each provided with a lock claw that is constantly energized and meshes with the teeth of the drive gear to prevent rotation of the drive gear in only one direction; A lock release key that releases one of the lock members that prevents rotation in the rotation direction; and a support frame that supports the lock member; and the drive gear includes the connection key of the rotary shaft. It has a key groove that forms a space (play) for idling within a certain range, and only the rotating shaft is idled within a certain range and then linked with the drive gear. When the connecting key of the rotary shaft idles in the inner space of the key groove and abuts on one side wall of the key groove, at least the lock release key unlocks one of the lock members. The lock claw is released from the drive gear by pushing in the direction, and the drive gear linked to the rotary shaft via the connection key is rotatable.

ここで、一対のロック部材を駆動ギアに向けて常時付勢する手法としては、特定の方法に限られず、例えば、その回転中心を通過する鉛直軸よりも外側に重心を置くような形状ないし錘の設置によって自重によって垂下することを利用して駆動ギアに向けて常時付勢させることも可能であるが、より好ましくは駆動ギアに対して一対のロック部材の間に引っぱりばねが掛けられ、引っぱりばねのばね力で互いにロック部材が引き合うことで駆動ギアにロック爪が嵌合されるようにすることである。   Here, the method of constantly urging the pair of lock members toward the drive gear is not limited to a specific method, and for example, a shape or weight that places the center of gravity outside the vertical axis that passes through the center of rotation. It is possible to always urge toward the drive gear by using the drooping by its own weight by installation, but more preferably, a tension spring is hung between the pair of lock members with respect to the drive gear. The lock claw is fitted to the drive gear by pulling the lock members together by the spring force of the spring.

また、請求項１記載の発明にかかる可逆式回転運動伝達機構は、特定の用途に限定されるものではなく、産業機器やあらゆる可動部品・装置の可動機構の駆動源として利用することができるが、例えば椅子の座のスライド機構の駆動源として利用することが好ましい。   In addition, the reversible rotational motion transmission mechanism according to the first aspect of the present invention is not limited to a specific application, and can be used as a drive source for a movable mechanism of industrial equipment and all movable parts and devices. For example, it is preferably used as a drive source for a slide mechanism of a chair seat.

即ち、請求項１記載の可逆式回転運動伝達機構を椅子の可動部材とそれを支持する固定部材との間に配置し、被駆動側部材を可動部材又は固定部材のいずれか一方に固定すると共に駆動ギアを含む駆動側部材を可動部材又は固定部材のいずれか他方に固定し、回転シャフトの回転操作で可動部材をスライド可能とすることが好ましい。   That is, the reversible rotational motion transmission mechanism according to claim 1 is disposed between a movable member of a chair and a fixed member that supports the movable member, and the driven side member is fixed to either the movable member or the fixed member. It is preferable that the drive side member including the drive gear is fixed to either the movable member or the fixed member, and the movable member can be slid by rotating the rotary shaft.

ここで、可動構造物としては、座受け部材に支持される座板支持部材に対して水平移動する座であり、被駆動側部材を座又は座板支持部材のいずれか一方に固定すると共に駆動側部材を座又は座板支持部材のいずれか他方に固定し、回転シャフトの回転操作で座を前後方向にスライド可能とすることが好ましい。   Here, the movable structure is a seat that moves horizontally with respect to the seat plate support member supported by the seat receiving member, and the driven side member is fixed to either the seat or the seat plate support member and driven. It is preferable that the side member is fixed to either the seat or the seat plate support member, and the seat can be slid in the front-rear direction by the rotation operation of the rotary shaft.

また、可動構造物としては、座受け部材と背支桿との間に配置される背ガススプリングの座受け部材に対する連結位置を変更可能とする背ガススプリングの位置調整機構であり、被駆動側部材を背ガススプリングの端部と座受け部材とを連結しかつ座受け部材の長孔内を貫通して移動する連結ピン又は座受け部材のいずれか一方に固定すると共に駆動側部材を連結ピン又は座受け部材のいずれか他方に固定し、回転シャフトの回転操作で被駆動側部材を移動させて連結ピンを長孔内で移動させることにより背ガススプリングの傾きを調整することが好ましい。   Further, the movable structure is a back gas spring position adjusting mechanism that can change a connecting position of the back gas spring arranged between the seat receiving member and the back support rod with respect to the seat receiving member. The member is connected to the end of the back gas spring and the seat receiving member and fixed to either the connecting pin or the seat receiving member that moves through the long hole of the seat receiving member and the drive side member is connected to the connecting pin. Alternatively, it is preferable to adjust the inclination of the back gas spring by fixing the seat receiving member to the other and moving the driven side member by rotating the rotating shaft to move the connecting pin within the long hole.

また、可動構造物としては、背支桿に対して昇降可能な背であり、被駆動側部材を背又は背支桿のいずれか一方に固定すると共に駆動側部材を背又は背支桿のいずれか他方に固定し、回転シャフトの回転操作で背を昇降可能とすることが好ましい。   The movable structure is a back that can be raised and lowered with respect to the back support rod. The driven side member is fixed to either the back or the back support rod, and the drive side member is either the back or the back support rod. It is preferable to fix it to the other and make it possible to raise and lower the back by rotating the rotary shaft.

また、可動構造物としては、肘支持部材に沿って昇降可能な肘であり、被駆動側部材を肘又は肘支持部材のいずれか一方に固定すると共に駆動側部材を肘又は肘支持部材のいずれか他方に固定し、回転シャフトの回転操作で肘を昇降可能とすることが好ましい。   The movable structure is an elbow that can be moved up and down along the elbow support member. The driven side member is fixed to either the elbow or the elbow support member, and the drive side member is either the elbow or the elbow support member. It is preferable that the elbow can be moved up and down by rotating the rotating shaft.

また、可動構造物としては、背フレームに対して前後方向に出入り自在なランバーサポートであり、被駆動側部材をランバーサポート又は背フレームのいずれか一方に固定すると共に駆動側部材をランバーサポート又は背フレームのいずれか他方に固定し、回転シャフトの回転操作でランバーサポートを前後方向に出入り可能とすることが好ましい。   Further, the movable structure is a lumbar support that can enter and exit in the front-rear direction with respect to the back frame. The driven side member is fixed to either the lumbar support or the back frame and the driving side member is fixed to the lumbar support or the back frame. It is preferable that the lumbar support can be moved in and out in the front-rear direction by being fixed to either one of the frames and rotating the rotary shaft.

また、可動構造物としては、背支桿に対して昇降可能なヘッドレストであり、被駆動側部材をヘッドレスト又は背支桿のいずれか一方に固定すると共に駆動側部材をヘッドレスト又は背支桿のいずれか他方に固定し、回転シャフトの回転操作でヘッドレストを昇降可能とすることが好ましい。   The movable structure is a headrest that can be raised and lowered with respect to the back support rod. The driven side member is fixed to either the headrest or the back support rod, and the drive side member is either the headrest or the back support rod. It is preferable that the headrest can be moved up and down by rotating the rotary shaft.

請求項１記載の可逆式回転伝達機構によると、本発明は、操作レバーを回転させるという１つの動作でロックの解除と駆動ギアの駆動回転とを連続して実行可能であり、かつ操作レバーによる回転入力を止めると自動的に駆動ギアにロック爪が食い込んで双方向に回転不能にできる。   According to the reversible rotation transmission mechanism according to the first aspect of the present invention, the unlocking and the driving rotation of the driving gear can be continuously performed by one operation of rotating the operating lever, and the operating lever is used. When the rotation input is stopped, the lock claw automatically bites into the drive gear, making it impossible to rotate in both directions.

また、本発明によると、同軸上に構成要素を配置するため、スペースをとらない。   Further, according to the present invention, since the components are arranged on the same axis, no space is required.

また、請求項２記載の可逆式回転伝達機構によると、ばねの力で回転シャフトからの入力がなくなると同時に強制的に一対のロック部材が原位置に確実に復帰するため、復帰と同時に一対のロック爪が互いに逆向きに駆動ギアに噛み込むため、被駆動側部材から入力があっても駆動ギアが回転することはない。つまり、自動的かつ確実にロックされる。   Further, according to the reversible rotation transmission mechanism according to claim 2, since the input from the rotating shaft is eliminated by the force of the spring and the pair of locking members are forcibly returned to their original positions, Since the locking claw bites into the driving gear in opposite directions, the driving gear does not rotate even if there is an input from the driven member. That is, it is locked automatically and reliably.

また、本発明の可逆式回転伝達機構を組みこんだ椅子の可動部材の駆動機構によれば、操作レバーの回転だけで正転あるいは逆転の双方に可動部材を直線移動あるいは回転移動させることができる。しかも、操作レバーを回転させるだけで、可動部材に対するロックの解除と駆動ギアの駆動・回転とを連続して実行可能であり、かつ操作部による回転入力を止めると自動的に駆動ギアにロック爪が食い込んで双方向に回転不能とされる。つまり、１アクションで可動部材の任意の移動が可能となり、かつ可動部材の移動を止めると同時に可動部材にロックがかかって不用意な移動を防止できる。このことは、座のスライド機構や背ガススプリングの傾きを調整する機構に特に限られず、背の昇降機構、肘の昇降機構、ランバーサポートの突出高さ調整機構、ヘッドレストの昇降機構などのあらゆる可動構造物のスライド機構として利用する場合に、操作が簡単なものとなるだけでなく、操作ミスの誘発や事故を未然に防ぐことができ、安全な構造となる。   Further, according to the drive mechanism for the movable member of the chair incorporating the reversible rotation transmission mechanism of the present invention, the movable member can be linearly moved or rotated in both the forward and reverse directions only by the rotation of the operation lever. . Moreover, it is possible to perform unlocking of the movable member and driving / rotation of the drive gear continuously by simply rotating the operation lever, and when the rotation input by the operation unit is stopped, the drive gear automatically locks. It bites in and cannot be rotated in both directions. That is, any movement of the movable member can be performed with one action, and at the same time the movement of the movable member is stopped, the movable member is locked to prevent inadvertent movement. This is not particularly limited to the seat slide mechanism or the mechanism that adjusts the inclination of the back gas spring, but any movable mechanism such as a back lifting mechanism, an elbow lifting mechanism, a lumbar support protrusion height adjusting mechanism, or a headrest lifting mechanism. When used as a slide mechanism for a structure, not only the operation becomes simple, but also an operation mistake can be prevented and an accident can be prevented, and a safe structure is obtained.

さらに、本発明の可逆式回転伝達機構を組みこんだ椅子の可動部材の駆動機構は、駆動機構とロック機構とを別々に設ける場合に比べて機構が簡単で設置スペースをとらないため、椅子の外観をコンパクトにできる。しかも、駆動ギアの１歯分ずつの位置調整が可能となるため、座のスライド機構や背ガススプリングの位置調整機構、背の昇降機構、肘の昇降機構、ランバーサポートの突出高さ調整機構、ヘッドレストの昇降機構などのあらゆる可動構造物のスライド機構として微調整が可能となる。   Furthermore, the drive mechanism of the movable member of the chair incorporating the reversible rotation transmission mechanism of the present invention is simpler and takes less installation space than the case where the drive mechanism and the lock mechanism are separately provided. The appearance can be made compact. Moreover, since it is possible to adjust the position of each tooth of the drive gear, the seat slide mechanism, the back gas spring position adjustment mechanism, the back lift mechanism, the elbow lift mechanism, the lumbar support protrusion height adjustment mechanism, Fine adjustment is possible as a slide mechanism for all movable structures such as a headrest lifting mechanism.

本発明の可逆式回転伝達機構の一実施形態を一部断面して示す平面図である。It is a top view which partially shows one Embodiment of the reversible rotation transmission mechanism of this invention. 同可逆式回転伝達機構のII-II線に沿う断面図である。It is sectional drawing which follows the II-II line of the same reversible rotation transmission mechanism. 同可逆式回転伝達機構のIII-III線に沿う断面図である。It is sectional drawing which follows the III-III line of the same reversible rotation transmission mechanism. 同可逆式回転伝達機構のロック状態を示す説明図である。It is explanatory drawing which shows the locked state of the reversible rotation transmission mechanism. 同可逆式回転伝達機構のロック解除状態を示す説明図である。It is explanatory drawing which shows the lock release state of the reversible rotation transmission mechanism. 同可逆式回転伝達機構のロック解除後の駆動ギア回転状態を示す説明図である。It is explanatory drawing which shows the drive gear rotation state after the lock release of the reversible rotation transmission mechanism. 同可逆式回転伝達機構の被駆動側部材を除いて示す分解図である。It is an exploded view which removes the driven side member of the same reversible rotation transmission mechanism. 同可逆式回転伝達機構を組みこんだ椅子の座のスライド機構を示す説明図である。It is explanatory drawing which shows the slide mechanism of the seat of the chair incorporating the same reversible rotation transmission mechanism. 同椅子の座のスライド機構を上から見た説明図である。It is explanatory drawing which looked at the slide mechanism of the seat of the chair from the top. 同可逆式回転伝達機構を組みこんだ椅子の背ガススプリングの初期長調整機構を示す説明図である。It is explanatory drawing which shows the initial length adjustment mechanism of the back gas spring of the chair incorporating the same reversible rotation transmission mechanism.

以下、本発明の構成を図面に示す実施形態に基づいて詳細に説明する。   Hereinafter, the configuration of the present invention will be described in detail based on embodiments shown in the drawings.

図１から図７に、本発明の可逆式回転運動伝達機構の実施形態の一例を示す。本実施形態の可逆式回転運動伝達機構１は、被駆動側部材としてラックが採用されることにより入力される回転運動を直線運動に変換して出力するものであり、主に駆動側部材２と被駆動側部材３とから成り、例えば可動機構の可動部材とそれを支持する固定部材との間に組み込まれ、被駆動側部材３を可動部材又は固定部材のいずれか一方に固定すると共に駆動側部材２を可動部材又は固定部材のいずれか他方に固定し、回転シャフト５の回転操作で一対のロック部材８ａ，８ｂの一方を解除してから駆動ギア４を回転させて被駆動側部材３に対して任意の運動を与えるようにしたものである。この可逆式回転運動伝達機構の場合、スライド機構の駆動源として適用する上で好ましい。尚、本発明のロック付き可逆式回転運動伝達機構は、必ずしも回転運動を直線運動に変換して出力するものに限られず、被駆動側部材として外歯歯車や内歯歯車を用いることにより回転運動をそのまま回転運動として出力するものとして構成しても良い。   1 to 7 show an example of an embodiment of the reversible rotational motion transmission mechanism of the present invention. The reversible rotational motion transmission mechanism 1 according to the present embodiment converts a rotational motion input by adopting a rack as a driven side member into a linear motion and outputs the linear motion. The driven side member 3 is incorporated, for example, between a movable member of a movable mechanism and a fixed member that supports the movable member, and the driven side member 3 is fixed to either the movable member or the fixed member and driven side. The member 2 is fixed to either the movable member or the fixed member, and one of the pair of lock members 8a and 8b is released by the rotation operation of the rotary shaft 5, and then the drive gear 4 is rotated to be the driven side member 3. An arbitrary movement is given to them. This reversible rotational motion transmission mechanism is preferable when applied as a drive source of the slide mechanism. Note that the reversible rotational motion transmission mechanism with a lock according to the present invention is not necessarily limited to one that converts rotational motion into linear motion and outputs it, and rotational motion is achieved by using external gears or internal gears as driven members. May be output as a rotational motion as it is.

本実施形態の可逆式回転運動伝達機構において、駆動側部材２は、回転シャフト５と、該回転シャフト５と連結キー６を介して回転方向にのみ係合する駆動ギア４と、この駆動ギア４に向けて常時付勢され駆動ギア４の歯に噛み合って駆動ギア４の回転を一方向にのみ阻止するロック爪９ａ，９ｂを備える一対のロック部材８ａ，８ｂと、回転シャフト５と摩擦力により一定範囲で連動回転し一対のロック部材８ａ，８ｂのうち回転方向に対して回転を阻止する部材となる一方のロック部材８ａあるいは８ｂを解除するロック解除キー１２と、これらを支持する支持フレーム１７とを備えている。   In the reversible rotational motion transmission mechanism of the present embodiment, the drive-side member 2 includes a rotation shaft 5, a drive gear 4 that engages only in the rotation direction with the rotation shaft 5 via a connection key 6, and the drive gear 4. A pair of lock members 8a and 8b having lock claws 9a and 9b that are always urged toward the gears and mesh with the teeth of the drive gear 4 to block the rotation of the drive gear 4 in only one direction, and the rotary shaft 5 and frictional force. The lock release key 12 that releases one lock member 8a or 8b that is a member that rotates in a certain range and prevents rotation in the rotation direction of the pair of lock members 8a and 8b, and a support frame 17 that supports them. And.

駆動ギア４は回転シャフト５の連結キー６が一定の範囲内で空転するための空間（遊び）を形成するキー溝７を有し、回転シャフト５だけが一定範囲において空転した後に駆動ギア４と連係するように設けられている。この回転シャフト５が空転する領域・角度は、駆動ギア４の回転に先立ってロック解除キー１２を回転させていずれか一方のロック部材８ａあるいは８ｂを押し出し、回転シャフト５の回転方向に対してロック機構として機能するいずれか一方のロック爪９ａあるいは９ｂを駆動ギア４の歯から離脱させるに十分な回転角度であることが必要である。つまり、回転シャフト５の連結キー６がキー溝７の内部空間を空転してキー溝７の一方の側壁７ａに当接したときには、少なくともロック解除キー１２がいずれか一方のロック部材８ａあるいは８ｂをロック解除方向に押して駆動ギア４からロック爪９ａあるいは９ｂを離脱させた状態となり、連結キー６を介して回転シャフト５と連係された駆動ギア４が回転可能となるように設けられている。   The drive gear 4 has a key groove 7 that forms a space (play) for the connecting key 6 of the rotating shaft 5 to idle within a certain range, and only the rotating shaft 5 idles within the certain range and It is provided to be linked. The region and angle of rotation of the rotating shaft 5 is such that the lock release key 12 is rotated prior to the rotation of the drive gear 4 to push out one of the lock members 8a or 8b, and the rotation shaft 5 is locked in the rotational direction. It is necessary that the angle of rotation is sufficient to disengage any one of the lock claws 9a or 9b functioning as a mechanism from the teeth of the drive gear 4. That is, when the connecting key 6 of the rotary shaft 5 idles in the inner space of the key groove 7 and comes into contact with one side wall 7a of the key groove 7, at least the lock release key 12 pushes one of the lock members 8a or 8b. The lock claw 9a or 9b is released from the drive gear 4 by pushing in the unlocking direction, and the drive gear 4 linked to the rotary shaft 5 via the connection key 6 is provided to be rotatable.

図３において、第１のロック部材８ａは駆動ギア４の時計回転方向への回転を阻止するロック爪９ａを有し、第２のロック部材８ｂは駆動ギア４の反時計回転方向への回転を阻止するロック爪９ｂを有する。これら一対のロック部材８ａ，８ｂの間には引っ張りばね１１が跨るように掛けられて互いに引っ張り合うことで、常時駆動ギア４に向けてロック爪９ａ，９ｂが逆方向に噛み合うように付勢されている。一対のロック部材８ａ，８ｂは、それぞれ基端に形成されている貫通孔（図示省略）を同心状に配置した状態で連結ボルト１５を貫通させることにより、揺動可能に連結ボルト１５ひいては支持フレーム１７に取り付けられている。このロック部材８ａ，８ｂのロック爪９ａ，９ｂよりも先の内側の面ではロック解除キー１２の円環部と同心状でかつやや大径の円弧を成すように形成され、その先端１０がロック解除キー１２の凸部１２ａと当接する位置まで延長されている。これにより、ロック部材８ａ，８ｂの先端１０がロック解除キー１２の凸部１２ａと当接するが、先端１０とロック爪９ａ，９ｂとの間の内側の面はロック解除キー１２の環状部１２ｃと隙間をあけて接触しないように配慮されている。尚、引っ張りばね１１は第１のロック部材８ａ並びに第２のロック部材８ｂにねじ込まれている取り付けボルト１６に両端のループ部分を引っ掛けて架けられている。また、一対のロック部材８ａ，８ｂを支持する連結ボルト１５は、支持フレーム１７に固定されている。   In FIG. 3, the first lock member 8a has a lock claw 9a that prevents the drive gear 4 from rotating in the clockwise direction, and the second lock member 8b rotates the drive gear 4 in the counterclockwise direction. It has a lock claw 9b for blocking. A tension spring 11 is stretched between the pair of lock members 8a and 8b so as to pull each other, so that the lock claws 9a and 9b are always urged toward the drive gear 4 so as to mesh in the opposite direction. ing. The pair of lock members 8a and 8b are configured so that the connection bolt 15 and the support frame are swingable by allowing the connection bolt 15 to pass through in a state in which through holes (not shown) formed at the base ends are arranged concentrically. 17 is attached. The inner surface of the lock members 8a and 8b ahead of the lock claws 9a and 9b is formed to be concentric with the annular portion of the lock release key 12 and have a slightly larger arc, and the tip 10 is locked. The release key 12 is extended to a position in contact with the convex portion 12a. As a result, the tip 10 of the lock member 8a, 8b comes into contact with the convex portion 12a of the lock release key 12, but the inner surface between the tip 10 and the lock claw 9a, 9b is connected to the annular portion 12c of the lock release key 12. Care is taken to avoid contact with gaps. The tension spring 11 is hung by hooking loop portions at both ends to mounting bolts 16 screwed into the first lock member 8a and the second lock member 8b. Further, the connecting bolt 15 that supports the pair of lock members 8 a and 8 b is fixed to the support frame 17.

ロック解除キー１２は一対のロック部材８ａ，８ｂを交互に連結ボルト１５を中心に揺動させるように回転させるものであり、環状部１２ｃとこの環状部１２ｃから半径方向外側に突出する凸部１２ａとを一体的に成形した形状を成す。このロック解除キー１２の環状部１２ｃには回転シャフト５が貫通され、回転シャフト５の回りに回転可能に支持されている。また、このロック解除キー１２とＥリング１４との間に圧縮コイルばね１３が配置され、圧縮コイルばね１３のばね力でロック解除キー１２が駆動ギア４に向けて常時付勢され、ロック解除キー１２の駆動ギア４側の端面１２ｂが回転シャフト５の連結キー６の端面６ａに押し当てられることにより、両端面１２ｂ，６ａの間の摩擦で回転シャフト５と一緒に回転する。そして、ロック部材８ａあるいは８ｂを一定角度回転させて、ロック部材８ａあるいは８ｂを持ち上げる力よりも引っ張りばね１１あるいは自重などによるロック部材８ａあるいは８ｂを押し下げる力が勝ったときに、ロック解除キー１２の駆動ギア４側の端面が回転シャフト５の連結キー６の端面６ａとの間に滑りが生じて、ロック解除キー１２に空転が生ずる。この結果、ロック解除キー１２によって駆動ギア４から離されるロック部材８ａあるいは８ｂは一定の角度・位置に保たれる。好ましくは、ロック部材８ａあるいは８ｂは、少なくとも駆動ギア４からロック爪９ａあるいは９ｂを離脱させるに必要な最小限の開きを設定して、ロック解除キー１２の復帰と同時に駆動ギア４にロック爪９ａ，９ｂが即座に駆動ギア４の歯に噛み込むように設けられている。   The lock release key 12 rotates the pair of lock members 8a and 8b alternately so as to swing around the connecting bolt 15. The annular portion 12c and the convex portion 12a projecting radially outward from the annular portion 12c. And is formed as a single piece. The rotary shaft 5 passes through the annular portion 12 c of the lock release key 12 and is supported so as to be rotatable around the rotary shaft 5. A compression coil spring 13 is disposed between the lock release key 12 and the E-ring 14, and the lock release key 12 is constantly urged toward the drive gear 4 by the spring force of the compression coil spring 13, and the lock release key When the end surface 12b on the drive gear 4 side of 12 is pressed against the end surface 6a of the connection key 6 of the rotating shaft 5, the end surface 12b rotates together with the rotating shaft 5 by friction between the both end surfaces 12b and 6a. When the lock member 8a or 8b is rotated by a certain angle and the force for pushing down the lock member 8a or 8b due to the tension spring 11 or its own weight wins over the force to lift the lock member 8a or 8b, the lock release key 12 The end face on the drive gear 4 side slips between the end face 6a of the connecting key 6 of the rotary shaft 5, and the lock release key 12 slips. As a result, the lock member 8a or 8b separated from the drive gear 4 by the lock release key 12 is maintained at a constant angle and position. Preferably, the lock member 8a or 8b sets at least a minimum opening necessary for detaching the lock claw 9a or 9b from the drive gear 4, and simultaneously with the return of the lock release key 12, the lock claw 9a is applied to the drive gear 4. , 9b are provided to immediately engage the teeth of the drive gear 4.

Ｅリング１４は回転シャフト５に形成されたＥリング用溝１９に嵌合されて圧縮コイルばね１３の一端を受け止めて圧縮コイルばね１３がロック解除キー１２を回転シャフトの連結キー６の端部に押し付ける反力を受けるようにしている。連結キー６の端面６ａは駆動ギア４の端面よりも僅かに軸方向に突出しており、ロック解除キー１２の端面１２ｂが直接駆動ギア４の端面と接触することを防いでいる。これにより、ロック解除キー１２は回転シャフト５と摩擦で一体化され、駆動ギア４の回転の有無にかかわらず、回転シャフト５と連動回転する。また、回転シャフト５には突起２１が設けられて止めワッシャ１８が引っ掛けられて支持フレーム１７の外で回転可能に支持されている。これにより、回転シャフト５は支持フレーム１７に対して軸方向には移動不能でかつ回転自在に支持される。尚、回転シャフト５の端にはグリップ２０が備えられている。   The E-ring 14 is fitted into an E-ring groove 19 formed in the rotary shaft 5 to receive one end of the compression coil spring 13, and the compression coil spring 13 places the lock release key 12 at the end of the connection key 6 of the rotation shaft. The reaction force to be pressed is received. The end face 6 a of the connection key 6 protrudes slightly in the axial direction from the end face of the drive gear 4, and the end face 12 b of the lock release key 12 is prevented from coming into direct contact with the end face of the drive gear 4. Thereby, the lock release key 12 is integrated with the rotary shaft 5 by friction, and rotates in conjunction with the rotary shaft 5 regardless of whether the drive gear 4 is rotated. Further, the rotating shaft 5 is provided with a projection 21, and a stop washer 18 is hooked and supported rotatably outside the support frame 17. Thereby, the rotating shaft 5 is supported so as not to be movable in the axial direction with respect to the support frame 17 and to be rotatable. A grip 20 is provided at the end of the rotating shaft 5.

この実施形態にかかる可逆式運動伝達機構は、被駆動側部材の運動形態によって異なる出力を得ることができる。例えば、図１に仮想線で示すように被駆動側部材たるラック３を駆動ギア４と常時噛み合わせるように配置すれば、回転シャフト５を介して駆動ギア４に入力される回転運動がラック３を直線移動させる直線運動に変換されて出力される。もっとも、この被駆動側部材３としては、ラックのような直線移動要素とせずに歯車のような回転要素とすることも可能であり、この場合には回転運動を回転運動として出力しつつ任意の位置で固定可能な可逆式回転運動伝達機構として構成することが可能となる。   The reversible motion transmission mechanism according to this embodiment can obtain different outputs depending on the motion form of the driven member. For example, if the rack 3 as the driven member is arranged so as to always mesh with the drive gear 4 as indicated by the phantom line in FIG. 1, the rotational motion input to the drive gear 4 via the rotation shaft 5 is transmitted to the rack 3. Is converted into a linear motion for linear movement and output. Of course, the driven member 3 can be a rotating element such as a gear instead of a linear moving element such as a rack. It can be configured as a reversible rotational motion transmission mechanism that can be fixed at a position.

以上のように構成された可逆式運動伝達機構によると、非駆動状態（スライド機構を停止させている状態）においては、図３あるいは図４に示すように、引っ張りばね１１の引っ張り力で互いに駆動ギア４に向けて引っ張られた一対のロック部材８ａ，８ｂが駆動ギア４並びにロック解除キー１２を包み込むように閉じて、ロック解除キー１２を凸部１２ａが垂下する原位置に復帰させると共にロック爪９ａ，９ｂの働きで駆動ギア４をニュートラル位置に戻す。このため、回転シャフト５から径方向に突出する連結キー６がキー溝７のほぼ中央に位置した状態とされる。この状態で操作グリップ２０を把持して回転シャフト５を任意の方向例えば図５に示すように時計回転方向に回転させると、まず駆動ギア４のキー溝７の遊び空間を回転シャフト５から突出する連結キー６が移動して回転シャフト５が空転する。このとき、回転シャフト５の連結キー６に対して圧縮コイルばね１３のばね力で押し当てられるロック解除キー１２が摩擦によって回転シャフト５と連れ回りを起こして回転方向に対して回転を阻止するロック爪９ａを備える一方のロック部材８ａを回転させる。これにより、ロック爪９ａが駆動ギア４から外れる。その後、図６に示すように、空転する回転シャフト５の連結キー６が駆動ギア４のキー溝７の一方の端部壁面７ａに当接して駆動ギア４そのものを回転させ始める。このとき、他方のロック部材８ｂのロック爪９ｂは、駆動ギア４の歯面を滑って外側に押し出される。つまり、ロック部材８ｂが反時計回転方向に回転させられる。そして、歯の頂部が通過すると同時に引っ張りばね１１の力あるいは自重によりロック部材８ｂが再び時計回転方向に回転してロック爪９ｂが１歯毎に原位置に戻り、駆動ギア４の歯と噛み合い逆転防止爪として機能する。このため、ロック部材８ｂは１歯ずつ駆動ギア４の回転を許容する一方向回転機構となり、被駆動側部材たるラック３を一方向に直線移動させる。   According to the reversible motion transmission mechanism configured as described above, in the non-driven state (the state where the slide mechanism is stopped), as shown in FIG. 3 or FIG. The pair of lock members 8a and 8b pulled toward the gear 4 are closed so as to wrap the drive gear 4 and the lock release key 12, and the lock release key 12 is returned to the original position where the convex portion 12a hangs down and is locked. The drive gear 4 is returned to the neutral position by the action of 9a and 9b. For this reason, the connecting key 6 projecting in the radial direction from the rotating shaft 5 is in a state of being positioned substantially at the center of the key groove 7. In this state, when the operation grip 20 is gripped and the rotary shaft 5 is rotated in an arbitrary direction, for example, clockwise as shown in FIG. 5, first, the play space of the key groove 7 of the drive gear 4 protrudes from the rotary shaft 5. The connecting key 6 moves and the rotary shaft 5 rotates idle. At this time, the unlocking key 12 pressed against the connecting key 6 of the rotating shaft 5 by the spring force of the compression coil spring 13 causes the rotation of the rotating shaft 5 by friction to prevent rotation in the rotating direction. One lock member 8a provided with the claw 9a is rotated. As a result, the lock claw 9 a is detached from the drive gear 4. After that, as shown in FIG. 6, the connecting key 6 of the rotating shaft 5 that idles contacts the one end wall surface 7 a of the key groove 7 of the drive gear 4 and starts to rotate the drive gear 4 itself. At this time, the lock claw 9b of the other lock member 8b slides on the tooth surface of the drive gear 4 and is pushed outward. That is, the lock member 8b is rotated counterclockwise. Then, simultaneously with the passage of the top of the teeth, the lock member 8b rotates clockwise again by the force of the tension spring 11 or its own weight, and the lock claw 9b returns to the original position for each tooth, and meshes with the teeth of the drive gear 4 and reversely rotates. Functions as a prevention nail. For this reason, the lock member 8b becomes a one-way rotation mechanism that allows the drive gear 4 to rotate one tooth at a time, and linearly moves the rack 3 as the driven side member in one direction.

また、任意の直線送り量を与えた後、操作グリップ２０の握りを緩めあるいは離すと、駆動ギア４の歯面を滑って外側に押し出されていた他方のロック部材８ｂのロック爪９ｂが引っ張りばね１１の引っ張り力あるいは自重により原位置に復帰しようと歯底に向かって移動するため、さらにはロック解除キー１２によって持ち上げられるように時計回転方向に回転させられていた一方のロック部材８ａが引っ張りばね１１の引っ張り力あるいは自重により原位置に復帰しようとその先端１０でロック解除キー１２を押し戻しながら移動するため、一対のロック部材８ａ，８ｂの各ロック爪９ａ，９ｂがそれぞれ駆動ギア４に噛み込んで逆転防止爪として機能するため、駆動ギア４はいずれの回転方向にも固定される。同時に、一方のロック部材８ａのロック爪９ａが歯に噛み込む際にロック解除キー１２の回転と同時に連結キー６との間の摩擦力で連れ回りされる回転シャフト５が反時計回転方向に空転してキー溝７のほぼ中央に連結キー６が復帰する。   When the grip of the operation grip 20 is loosened or released after giving an arbitrary linear feed amount, the lock claw 9b of the other lock member 8b that has been pushed out by sliding on the tooth surface of the drive gear 4 is pulled out by a tension spring. One lock member 8a that has been rotated in the clockwise direction so as to be lifted by the lock release key 12 is moved by a tension spring or its own weight to return to the original position by the pulling force or its own weight. In order to return to the original position due to the pulling force of 11 or its own weight, the lock claw 9a, 9b of the pair of lock members 8a, 8b is engaged with the drive gear 4 because the lock release key 12 is moved back by the tip 10 thereof. In order to function as a reverse rotation prevention claw, the drive gear 4 is fixed in any rotation direction. At the same time, when the lock claw 9a of one lock member 8a bites into the teeth, the rotating shaft 5 rotated by the frictional force with the connecting key 6 simultaneously with the rotation of the unlocking key 12 rotates counterclockwise. As a result, the connecting key 6 returns to the approximate center of the keyway 7.

連結キー６が駆動ギア４と切り離されると同時にロック解除キー１２を元の位置に戻してロック爪９ａを駆動ギア４の歯に嵌合させる。しかして、今まで回転させていた方向に対しても一方のロック部材８ａのロック爪９ａが食い込むことにより回転不能とする。これにより、双方向に駆動ギア４の回転が阻止された状態となり、被駆動側部材たるラック３側からどちらの方向に移動する入力があったとしても、駆動ギア４は一切回転しない。つまり、駆動ギア４による被駆動側部材３の運動に対して双方向へのロックが行われる。   At the same time when the connecting key 6 is disconnected from the drive gear 4, the lock release key 12 is returned to its original position, and the lock claw 9 a is fitted to the teeth of the drive gear 4. Accordingly, the lock claw 9a of the one lock member 8a bites into the direction that has been rotated until now, so that the rotation is impossible. As a result, the drive gear 4 is prevented from rotating in both directions, and the drive gear 4 does not rotate at all regardless of the direction of movement from the rack 3 side as the driven member. That is, the movement of the driven side member 3 by the drive gear 4 is locked in both directions.

以上のように構成された本実施形態の可逆式回転運動伝達機構を椅子の座のスライド機構の駆動源として適用した例を図８及び図９に示す。このスライド機構の場合、被駆動側部材３としてはラックが採用され、操作グリップ２０を介して入力される回転運動をラック３の直線運動に変換して座２２の前後動という直線運動として出力するものである。スライド機構は、主に可動側部材と固定側部材とに分けられるが、本実施形態の場合には可動側部材となる座２２の座板２７にラック３が固定され、駆動側部材２としての可逆式回転運動伝達機構の本体が座板支持部材２３に固定されている。   FIG. 8 and FIG. 9 show an example in which the reversible rotational motion transmission mechanism of the present embodiment configured as described above is applied as a drive source of a chair seat slide mechanism. In the case of this slide mechanism, a rack is employed as the driven member 3, and the rotational motion input via the operation grip 20 is converted into the linear motion of the rack 3 and output as a linear motion of the seat 22 moving back and forth. Is. The sliding mechanism is mainly divided into a movable side member and a fixed side member. In this embodiment, the rack 3 is fixed to the seat plate 27 of the seat 22 serving as the movable side member. The main body of the reversible rotational motion transmission mechanism is fixed to the seat plate support member 23.

座板支持部材２３は前端側が座受け部材２８の先端側に回転自在に連結されると共に後端側が背支桿２９に回転自在に連結され、背支桿２９の揺動と共に座板支持部材２３そのものが前後方向に僅かに移動しながら傾きを変えるように設けられている。この座板支持部材２３は、図８に示すように、前後方向に延びる一対のガイドレール２３ａと、その中央部で横切るように連結した溝形の梁２３ｂと、左右一対のガイドレール２３ａの後端を互いに連結して背支桿２９に回転自在に連結するための連結管２３ｃと、座受け部材２８の前端の長孔（図１０において符号２８ａで示される）を貫通する連結ピン（図示省略）を介して左右のガイドレール２３ａの前端を回転自在及び／または水平方向に移動可能に座受け部材２８に連結するための前端円筒部２３ｄとを備え、背支桿２９の揺動に伴って前後動しつつ僅かに後端側を沈めるように傾斜可能に座受け部材２８に支持されている。   The front end side of the seat plate support member 23 is rotatably connected to the front end side of the seat receiving member 28, and the rear end side is rotatably connected to the back support rod 29, and the seat plate support member 23 is swung with the back support rod 29. It is provided to change its inclination while moving slightly in the front-rear direction. As shown in FIG. 8, the seat plate support member 23 includes a pair of guide rails 23a extending in the front-rear direction, a groove-shaped beam 23b connected so as to cross at the center, and a rear of the pair of left and right guide rails 23a. A connecting pipe 23c for connecting the ends to each other and rotatably connecting to the back support rod 29, and a connecting pin (not shown) passing through a long hole (indicated by reference numeral 28a in FIG. 10) at the front end of the seat receiving member 28. ) And the front end cylindrical portion 23d for connecting the front ends of the left and right guide rails 23a to the seat receiving member 28 so as to be rotatable and / or movable in the horizontal direction. It is supported by the seat receiving member 28 so as to be able to incline so as to slightly sink the rear end side while moving back and forth.

この座板支持部材２３のガイドレール２３ａの前半部（梁２３ｂよりも前方）には、座板２７側に形成される摺動用ガイドフック２５が嵌合され、かつ座２２の装着位置よりも後方へスライドさせたときに摺動用ガイドフック２５が鉛直方向に係合するフランジを有するＬ形の摺動用ガイド溝２４が設けられている。他方、ガイドレール２３ａの後半部（梁２３ｂよりも後方）には、座板２７側に形成される摺動用ガイドフック２５を座２２の装着位置よりも後方へスライドさせたときに嵌合し摺動用ガイドフック２５が鉛直方向に係合するＩ形の摺動用ガイドフランジ２３ｅが設けられている。また、座板２７にはオーバーラン防止用フック２６が設けられ、このオーバーラン防止用フック２６が座２２の座板支持部材２３への装着時に弾性変形して梁２３ｂを乗り越えた後に梁２３ｂと連結管２３ｃとの間の空間に突出することで、座板２７（座２２）の前後方向へのスライドを可能とする。したがって、座２２を摺動用ガイド溝２４並びに摺動用ガイドフランジ２３ｅに沿って前後動させることができる。   A sliding guide hook 25 formed on the side of the seat plate 27 is fitted in the front half of the guide rail 23a of the seat plate support member 23 (front side of the beam 23b), and rearward of the seat 22 mounting position. An L-shaped sliding guide groove 24 having a flange with which the sliding guide hook 25 engages in the vertical direction when being slid to is provided. On the other hand, the sliding guide hook 25 formed on the side of the seat plate 27 is fitted to the rear half of the guide rail 23a (behind the beam 23b) when sliding backward from the seat 22 mounting position. An I-shaped sliding guide flange 23e with which the moving guide hook 25 is engaged in the vertical direction is provided. The seat plate 27 is provided with an overrun prevention hook 26. The overrun prevention hook 26 is elastically deformed when the seat 22 is attached to the seat plate support member 23 and passes over the beam 23b. By projecting into the space between the connecting pipe 23c, the seat plate 27 (seat 22) can be slid in the front-rear direction. Therefore, the seat 22 can be moved back and forth along the sliding guide groove 24 and the sliding guide flange 23e.

以上のように構成された椅子の座のスライド機構によると、グリップ２０を把持して回転シャフト５を任意の方向に回転させると、まず回転シャフト５が空転している間にその回転方向において駆動ギア４の回転を阻止するロック爪９ａあるいは９ｂを備える一方のロック部材８ａあるいは８ｂをロック解除キー１２によって回転させて、ロック爪９ａあるいは９ｂを駆動ギア４から離脱させる（図５参照）。その後、空転する回転シャフト５の連結キー６が駆動ギア４のキー溝７の一方の端部壁面７ａに当接して駆動ギア４そのものを回転させ始め（図６参照）、駆動ギア４と噛み合うラック３ひいてはこれが取り付けられた座板２７・座２２を前進あるいは後退させる。そして、回転シャフト５の回転を止めてグリップ２０から手を離すと、ロック解除キー１２によって回転させられ駆動ギア４から外されていた一方のロック部材８ａあるいは８ｂ並びにロック爪９ａあるいは９ｂを駆動ギア４に噛み込ませて、その位置で座２２は座板支持部材２３に対して固定される（図４参照）。同様に、グリップ２０を逆転させて板２７・座２２を後退あるいは前進させる場合にも、まずロック解除キー１２の回転による駆動ギア４の回転を阻止するロック爪９ｂあるいは９ａの離脱を行ってから駆動ギアの回転を開始する。このため、回転シャフトの回転操作だけで、座２２を前進あるいは後退させることができる。しかも、回転シャフト５を同じ方向に回転させるだけで、ロックの解除と駆動ギアの回転とを連続して実行可能であり、かつ回転シャフト５への回転入力を止めると同時に外れていたロック爪が駆動ギアに食い込んで双方向に回転不能とされるので、自動的にスライド機構にロックがかかる。したがって、座２２を掴んで前後動させようとしても座は動かない。   According to the chair seat slide mechanism configured as described above, when the grip 20 is gripped and the rotary shaft 5 is rotated in an arbitrary direction, the rotary shaft 5 is first driven in the rotational direction while the rotary shaft 5 is idling. One lock member 8a or 8b provided with the lock claw 9a or 9b for preventing the rotation of the gear 4 is rotated by the lock release key 12, and the lock claw 9a or 9b is detached from the drive gear 4 (see FIG. 5). Thereafter, the connecting key 6 of the rotating rotating shaft 5 is in contact with one end wall surface 7a of the key groove 7 of the drive gear 4 and starts to rotate the drive gear 4 itself (see FIG. 6), and the rack meshes with the drive gear 4. 3. As a result, the seat plate 27 and the seat 22 to which this is attached are moved forward or backward. Then, when the rotation of the rotary shaft 5 is stopped and the grip 20 is released, the one lock member 8a or 8b and the lock claw 9a or 9b, which are rotated by the lock release key 12 and removed from the drive gear 4, are driven. 4, the seat 22 is fixed to the seat plate support member 23 at that position (see FIG. 4). Similarly, when reversing or advancing the plate 27 / seat 22 by reversing the grip 20, the lock claw 9b or 9a that prevents the drive gear 4 from rotating due to the rotation of the lock release key 12 is first removed. Start driving gear rotation. For this reason, the seat 22 can be moved forward or backward only by rotating the rotating shaft. Moreover, by simply rotating the rotating shaft 5 in the same direction, the unlocking and the rotation of the drive gear can be performed continuously, and the lock claw that has been removed at the same time as the rotation input to the rotating shaft 5 is stopped. Since the drive gear is bitten and cannot rotate in both directions, the slide mechanism is automatically locked. Accordingly, even if the seat 22 is grasped and moved forward and backward, the seat does not move.

次に、以上のように構成された本実施形態の可逆式回転運動変換機構を椅子の背を支える背ガススプリングの傾きを調整する機構の駆動源として適用した例を図１０に示す。この背ガススプリングの位置調整機構の場合、被駆動側部材３としてはラックが採用され、操作グリップを介して回転シャフトに入力される回転運動をラック３の直線運動に変換して背ガススプリング３０の座受け部材２８側への取り付け位置を円弧状の長孔３１に沿って移動させることにより、背ガススプリング３０の座受け部材に対する連結位置を変更することにより傾きを調整可能とするものである。この実施形態において、可逆式回転運動伝達機構１の本体たる駆動側部材２は、支持フレーム１７が座受け部材２８の後端側に固定され、長孔３１と平行に配置されるラック３が支持フレーム１７内を貫通して駆動ギア４と噛み合うように傾斜させて配置されている。そして、背ガススプリング３０は操作バルブを有する先端側が背支桿２９に揺動自在に連結されると共に基端側連結部材３２が座受け部材２８に設けられた長孔３１に連結ピン３３を介して摺動自在に連結されている。ここで、連結ピン３３には、ラック３の基端部が回転自在に連結されて、ラック３の移動と共に連結ピン３３ひいては背ガススプリング３０の基端側連結部材３２が長孔３１内を移動して、背ガススプリング３０の傾きを調整して同じ傾きを背もたれに与える場合においても背ガススプリング３０の圧縮量を変化させることで反力調整するようにしている。尚、図中の符号３４は反力機構を示す。   Next, FIG. 10 shows an example in which the reversible rotational motion conversion mechanism of the present embodiment configured as described above is applied as a drive source of a mechanism that adjusts the inclination of the back gas spring that supports the back of the chair. In the case of this back gas spring position adjusting mechanism, a rack is adopted as the driven side member 3, and the back gas spring 30 is converted by converting the rotational motion input to the rotary shaft via the operation grip into the linear motion of the rack 3. By moving the attachment position of the back gas spring 30 along the arc-shaped elongated hole 31 to change the connecting position of the back gas spring 30 to the seat receiving member, the inclination can be adjusted. . In this embodiment, the drive side member 2 which is the main body of the reversible rotational motion transmission mechanism 1 is supported by the rack 3 in which the support frame 17 is fixed to the rear end side of the seat receiving member 28 and arranged in parallel with the long hole 31. It is inclined and arranged so as to penetrate through the frame 17 and mesh with the drive gear 4. The back gas spring 30 has a front end side having an operation valve connected to the back support rod 29 so as to be swingable, and a base end side connecting member 32 is connected to a long hole 31 provided in the seat receiving member 28 via a connecting pin 33. Are slidably connected. Here, the base end of the rack 3 is rotatably connected to the connection pin 33, and the connection pin 33 and thus the base end side connection member 32 of the back gas spring 30 moves in the long hole 31 as the rack 3 moves. Even when the inclination of the back gas spring 30 is adjusted to give the same inclination to the backrest, the reaction force is adjusted by changing the compression amount of the back gas spring 30. Incidentally, reference numeral 34 in the figure denotes a reaction force mechanism.

以上のように構成された椅子の背ガススプリング位置調整機構においても、グリップ操作により回転シャフト５を任意の方向に回転させると、まず回転シャフト５の空転によって駆動ギア４の回転を阻止するロック爪９ａあるいは９ｂを備える一方のロック部材８ａあるいは８ｂを駆動ギア４から離脱させた後、駆動ギア４そのものを回転させて駆動ギア４と噛み合うラック３ひいてはこれが取り付けられた連結ピン３３を長孔３１に沿って移動させる。そして、背ガススプリング３０の傾き即ち背ガススプリング３０の傾きを所望の値に調整した後、回転シャフト５の回転を止めると、ロック解除キー１２の原位置への復帰とともに駆動ギア４から外されていた一方のロック部材８ａあるいは８ｂのロック爪９ａあるいは９ｂを駆動ギア４に噛み込ませて、その位置で長孔３１内の連結ピン３３を座受け部材２８に対して固定させる。このとき、駆動ギア４は互いに逆方向の回転に対して逆転防止となる一対のロック爪９ａあるいは９ｂによって回転が阻止されるため、連結ピン３３側からかかる外力によっては背ガススプリング３０の基端側連結部材３２を移動させることはできない。   Also in the back gas spring position adjustment mechanism of the chair configured as described above, when the rotating shaft 5 is rotated in an arbitrary direction by a grip operation, first, the lock claw that prevents the driving gear 4 from rotating due to the idling of the rotating shaft 5. After one locking member 8a or 8b having 9a or 9b is disengaged from the drive gear 4, the drive gear 4 itself is rotated to engage the drive gear 4, and the connecting pin 33 to which the rack 3 is attached is formed in the long hole 31. Move along. Then, after adjusting the inclination of the back gas spring 30, that is, the inclination of the back gas spring 30 to a desired value, when the rotation of the rotary shaft 5 is stopped, the lock release key 12 is returned to the original position and is removed from the drive gear 4. The locking claw 9a or 9b of one of the locking members 8a or 8b is engaged with the drive gear 4, and the connecting pin 33 in the long hole 31 is fixed to the seat receiving member 28 at that position. At this time, the drive gear 4 is prevented from rotating by a pair of lock claws 9a or 9b that prevent reverse rotation with respect to rotations in opposite directions, so that the base end of the back gas spring 30 may be affected by external force applied from the connecting pin 33 side. The side connecting member 32 cannot be moved.

この実施形態の背ガススプリング位置調整機構の場合、連結ピン３３の移動即ち背ガススプリング３０の傾きの調整は、駆動ギア４・ラック３の１歯分ずつ調整することができ、長孔３１そのものに連結ピン３３を嵌め込む凹部を形成する場合よりも微調整が可能となる。   In the case of the back gas spring position adjusting mechanism of this embodiment, the movement of the connecting pin 33, that is, the adjustment of the inclination of the back gas spring 30, can be adjusted for each tooth of the drive gear 4 and the rack 3, and the long hole 31 itself. Fine adjustment is possible as compared with the case where the concave portion into which the connecting pin 33 is fitted is formed.

なお、上述の形態は本発明の好適な形態の一例ではあるがこれに限定されるものではなく本発明の要旨を逸脱しない範囲において種々変形実施可能である。例えば、本実施形態の可逆式回転運動伝達機構においては、一対のロック部材８ａ，８ｂの間には引っぱりばね１１が介在され、互いに引っ張りばね１１により引き合うことにより駆動ギア４にロック爪９ａ，９ｂが嵌合されるようにしているが、これに特に限定されるものではなく、一対のロック部材８ａ，８ｂの連結箇所（連結ボルト１５）よりも重力作用方向において下方にロック爪９ａ，９ｂ並びにロック部材８ａ，８ｂの先端を配置することで、自重により駆動ギア４を挟み付ける付勢力を発生させるようにしても良い。また、本実施形態では独立した支持フレーム１７によって駆動歯車４などを支持するようにしているが、場合によっては座受け部材２８や座板支持部材２３などの駆動側部材２を固定する構造物そのものに直接駆動ギア４などを支持させることによって、独立した支持フレーム１７を省くことも可能である。この場合において、駆動側部材２を固定する構造物そのものが支持フレーム１７を兼ねるものである。   The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the scope of the present invention. For example, in the reversible rotational motion transmission mechanism of the present embodiment, a tension spring 11 is interposed between the pair of lock members 8 a and 8 b, and the lock claw 9 a and 9 b is attached to the drive gear 4 by being pulled by the tension spring 11. However, the present invention is not particularly limited to this, and the lock claws 9a, 9b and the lock claws 9a, 9b and the connection portions (the connection bolts 15) of the pair of lock members 8a, 8b in the gravitational action direction. By disposing the tips of the lock members 8a and 8b, an urging force for sandwiching the drive gear 4 by its own weight may be generated. In the present embodiment, the drive gear 4 and the like are supported by the independent support frame 17, but in some cases, the structure itself that fixes the drive side member 2 such as the seat receiving member 28 and the seat plate support member 23. It is also possible to omit the independent support frame 17 by directly supporting the drive gear 4 and the like. In this case, the structure itself that fixes the drive side member 2 also serves as the support frame 17.

また、本発明の可逆式回転運動伝達機構１は特定の用途に限定されるものではなく、産業機器やあらゆる可動部品・装置のスライド機構に利用することができる。さらに本発明の可逆式回転運動伝達機構を組みこむ椅子の可動構造物のスライド機構としては、上述の座のスライド機構や背ガススプリングの角度調整する機構に特に限定されず、例えば、図示していないが背の昇降機構、肘の昇降機構、ランバーサポートの突出高さ調整機構、ヘッドレストの昇降機構などのあらゆる可動構造物のスライド機構として利用することができる。この場合、可動側となる椅子の構造物（被駆動側部材３）とそれをスライド可能に支持する固定側構造物（駆動側部材２）との間に可逆式回転運動伝達機構１が組み込まれるが、駆動ギア４を含む駆動側部材（本体）２側を固定側構造物に設置すると共に被駆動側部材３を可動側構造物に備える場合に限られず、駆動ギア４を含む本体２側を可動側構造物に設置すると共にラック３を固定側構造物に備えるようにしても良い。具体的には、被駆動側部材たるラック３を背又は背支桿のいずれか一方に固定すると共に駆動ギア４を含む駆動側部材２を背又は背支桿のいずれか他方に固定し、回転シャフト５の回転操作で背を昇降可能とする。また、肘の昇降機構の場合には、被駆動側部材たるラック３を肘又は肘支持部材のいずれか一方に固定すると共に駆動ギア４を含む駆動側部材２を肘又は肘支持部材のいずれか他方に固定し、回転シャフトの回転操作で肘を昇降可能とする。また、ランバーサポートの突出高さ調整機構の場合には、被駆動側部材たるラック３をランバーサポート又は背フレームのいずれか一方に固定すると共に駆動ギア４を含む駆動側部材２をランバーサポート又は背フレームのいずれか他方に固定し、回転シャフトの回転操作でランバーサポートを前後方向に出入り可能とする。さらに、ヘッドレストの昇降機構の場合には、被駆動側部材たるラック３をヘッドレスト又は背支桿のいずれか一方に固定すると共に駆動ギア４を含む駆動側部材２をヘッドレスト又は背支桿のいずれか他方に固定し、回転シャフトの回転操作でヘッドレストを昇降可能とする。   Further, the reversible rotational motion transmission mechanism 1 of the present invention is not limited to a specific application, and can be used for a slide mechanism of industrial equipment and all movable parts / devices. Furthermore, the slide mechanism of the movable structure of the chair incorporating the reversible rotational motion transmission mechanism of the present invention is not particularly limited to the above-mentioned seat slide mechanism and the mechanism for adjusting the angle of the back gas spring, and is illustrated, for example, It can be used as a sliding mechanism for all movable structures such as a back lifting mechanism, an elbow lifting mechanism, a lumbar support protrusion height adjusting mechanism, and a headrest lifting mechanism. In this case, the reversible rotational movement transmission mechanism 1 is incorporated between the chair structure (driven member 3) on the movable side and the fixed structure (driving member 2) that slidably supports the structure. However, the present invention is not limited to the case where the driving side member (main body) 2 side including the driving gear 4 is installed on the fixed side structure and the driven side member 3 is provided on the movable side structure. The rack 3 may be provided in the fixed side structure while being installed in the movable side structure. Specifically, the rack 3 as the driven side member is fixed to either the back or the back support rod, and the drive side member 2 including the drive gear 4 is fixed to either the back or the back support rod, and the rotation is performed. The back can be raised and lowered by rotating the shaft 5. Further, in the case of an elbow raising / lowering mechanism, the drive side member 2 including the drive gear 4 is fixed to either the elbow or the elbow support member while the rack 3 as the driven side member is fixed to either the elbow or the elbow support member. The elbow can be moved up and down by rotating the rotating shaft. Further, in the case of the lumbar support protrusion height adjusting mechanism, the rack 3 as the driven member is fixed to either the lumbar support or the back frame, and the driving member 2 including the driving gear 4 is fixed to the lumbar support or back. It is fixed to either one of the frames, and the lumbar support can be moved back and forth by rotating the rotating shaft. Further, in the case of the headrest lifting mechanism, the rack 3 as the driven side member is fixed to either the headrest or the back support rod, and the drive side member 2 including the drive gear 4 is either the headrest or the back support rod. The headrest can be moved up and down by rotating the rotating shaft.

また、本発明では、被駆動側部材３として主にラックの例を挙げて説明したが、場合によっては外歯歯車あるいは内歯歯車を用いることにより、回転運動を回転運動として出力しつつ任意の位置で固定可能な可逆式回転クラッチ機構として構成することも可能である。例えば、背のリクライニング機構の駆動機構として適用すれば、回転シャフト５の回転操作で背を１歯ずつの送り分だけ傾斜させながら、送りを止めた任意の位置で駆動ギア４を一対のロック部材８ａ，８ｂのロック爪９ａ，９ｂで回転不能に拘束し、背の傾きを固定することが可能となる。   In the present invention, an example of a rack is mainly described as the driven side member 3. However, in some cases, by using an external gear or an internal gear, an arbitrary gear can be output while outputting a rotary motion as a rotary motion. It is also possible to configure as a reversible rotary clutch mechanism that can be fixed in position. For example, when applied as a drive mechanism for a back reclining mechanism, the drive gear 4 is paired with a pair of lock members at an arbitrary position where the feed is stopped while the spine is tilted by a feed amount of one tooth by rotating the rotary shaft 5. The lock claws 9a and 9b of 8a and 8b are restrained so as not to rotate, and the back inclination can be fixed.

１ 可逆式回転運動変換機構
２ 駆動側部材
３ 被駆動側部材（ラック）
４ 駆動ギア
５ シャフト
６ 連結キー
７ キー溝
８ ロック部材
９ ロック爪
１０ ロック部材の先端
１１ 引っ張りばね
１２ ロック解除キー
１３ 圧縮コイルばね
１４ Ｅリング
１５ 連結ボルト
１６ 取り付けボルト
１７ 支持フレーム
１８ 止めワッシャ
１９ Ｅリング用溝
２０ グリップ
２１ 突起
２２ 座
２３ 座板支持部材
２４ 摺動用ガイド溝
２５ 摺動用ガイドフック
２６ オーバーラン防止用フック
２７ 座板
２８ 座受け部材
２９ 背支桿
３０ 背ガススプリング
３１ 長孔
３２ 背ガススプリングの基端側の連結部材
３３ 連結ピン
３４ 反力機構 DESCRIPTION OF SYMBOLS 1 Reversible rotational motion conversion mechanism 2 Drive side member 3 Driven side member (rack)
4 Drive gear 5 Shaft 6 Connection key 7 Key groove 8 Lock member 9 Lock claw 10 Lock member tip 11 Tension spring 12 Lock release key 13 Compression coil spring 14 E ring 15 Connection bolt 16 Mounting bolt 17 Support frame 18 Stop washer 19 E Ring groove 20 Grip 21 Projection 22 Seat 23 Seat plate support member 24 Slide guide groove 25 Slide guide hook 26 Overrun prevention hook 27 Seat plate 28 Seat support member 29 Back support rod 30 Back gas spring 31 Long hole 32 Back Connecting member 33 on the base end side of the gas spring Connecting pin 34 Reaction force mechanism

Claims (9)

回転シャフトと、該回転シャフトと連結キーを介して回転方向にのみ係合する駆動ギアと、この駆動ギアに向けて常時付勢され前記駆動ギアの歯に噛み合って前記駆動ギアの回転を一方向にのみ阻止するロック爪を備える一対のロック部材と、前記回転シャフトと摩擦力により一定範囲で連動回転し一対の前記ロック部材のうち回転方向に対して回転を阻止する部材となる一方のロック部材を解除するロック解除キーと、これらを支持する支持フレームとを備え、前記駆動ギアは前記回転シャフトの前記連結キーが一定の範囲内で空転するための空間（遊び）を形成するキー溝を有し、前記回転シャフトだけが一定範囲において空転した後に前記駆動ギアと連係するように設けられ、前記回転シャフトの前記連結キーが前記キー溝の内部空間を空転して前記キー溝の一方の側壁に当接したときには、少なくとも前記ロック解除キーがいずれか一方のロック部材をロック解除方向に押して前記駆動ギアから前記ロック爪を離脱させた状態となり、前記連結キーを介して前記回転シャフトと連係された前記駆動ギアが回転可能となるように設けられていることを特徴とする可逆式回転運動伝達機構。 A rotation shaft, a drive gear that engages only in the rotation direction via the rotation shaft and a connecting key, and is always urged toward the drive gear and meshes with the teeth of the drive gear to rotate the drive gear in one direction A pair of lock members each having a lock claw that blocks only one of the lock members, and one lock member that is a member that rotates in a certain range by the frictional force with the rotating shaft and that is a member that blocks rotation in the rotation direction of the pair of lock members. And a support frame for supporting them. The drive gear has a keyway that forms a space (play) for the connection key of the rotary shaft to idle within a certain range. And only the rotating shaft is idled within a certain range, and is provided so as to be linked to the drive gear, and the connecting key of the rotating shaft is connected to the inner space of the key groove. When idling and coming into contact with one side wall of the keyway, at least the unlocking key pushes one of the locking members in the unlocking direction to release the lock claw from the drive gear, and the connection A reversible rotary motion transmission mechanism, wherein the drive gear linked to the rotary shaft via a key is rotatable. 前記一対のロック部材の間には引っぱりばねが介在され、該引っぱりばねにより互いに引き合い前記駆動ギアに前記ロック爪が嵌合されるものである請求項１記載の可逆式回転運動伝達機構。   2. A reversible rotational motion transmission mechanism according to claim 1, wherein a tension spring is interposed between the pair of lock members, and the lock claw is fitted to the drive gear by being pulled together by the tension spring. 請求項１記載の可逆式回転運動伝達機構を椅子の可動部材とそれを支持する固定部材との間に配置し、前記被駆動側部材を前記可動部材又は前記固定部材のいずれか一方に固定すると共に前記駆動側部材を前記可動部材又は前記固定部材のいずれか他方に固定し、前記回転シャフトの回転操作で前記可動部材をスライド可能とするものである椅子の可動構造物のスライド機構。   The reversible rotational motion transmission mechanism according to claim 1 is disposed between a movable member of a chair and a fixed member that supports the movable member, and the driven side member is fixed to either the movable member or the fixed member. A slide mechanism for a movable structure of a chair, wherein the drive side member is fixed to either the movable member or the fixed member, and the movable member can be slid by rotating the rotary shaft. 前記可動構造物は座受け部材に支持される座板支持部材に対して水平移動する座であり、前記被駆動側部材を前記座又は前記座板支持部材のいずれか一方に固定すると共に前記駆動側部材を前記座又は前記座板支持部材のいずれか他方に固定し、前記回転シャフトの回転操作で前記座を前後方向にスライド可能とするものである請求項３記載の椅子の可動構造物のスライド機構。   The movable structure is a seat that moves horizontally with respect to a seat plate support member supported by a seat receiving member, and the driven side member is fixed to either the seat or the seat plate support member and driven. 4. The movable structure for a chair according to claim 3, wherein a side member is fixed to either the seat or the seat plate support member, and the seat can be slid in the front-rear direction by rotating the rotary shaft. Slide mechanism. 前記可動構造物は座受け部材と背支桿との間に配置される背ガススプリングの前記座受け部材に対する連結位置を変更可能とする背ガススプリングの位置調整機構であり、前記被駆動側部材を前記背ガススプリングの端部と前記座受け部材とを連結しかつ前記座受け部材の長孔内を貫通して移動する連結ピン又は前記座受け部材のいずれか一方に固定すると共に前記駆動側部材を前記連結ピン又は前記座受け部材のいずれか他方に固定し、前記回転シャフトの回転操作で前記被駆動側部材を移動させて前記連結ピンを前記長孔内で移動させることにより背ガススプリングの傾きを調整するものである請求項３記載の椅子の可動構造物のスライド機構。   The movable structure is a back gas spring position adjusting mechanism that can change a connecting position of a back gas spring disposed between a seat receiving member and a back support rod to the seat receiving member, and the driven side member And connecting the end portion of the back gas spring to the seat receiving member and fixing it to one of the connecting pin or the seat receiving member that moves through the elongated hole of the seat receiving member and the drive side A back gas spring is obtained by fixing a member to either the connection pin or the seat receiving member, moving the driven side member by rotating the rotary shaft, and moving the connection pin within the elongated hole. The sliding mechanism for the movable structure of the chair according to claim 3, wherein the inclination of the chair is adjusted. 前記可動構造物は背支桿に対して昇降可能な背であり、前記被駆動側部材を前記背又は前記背支桿のいずれか一方に固定すると共に前記駆動側部材を前記背又は前記背支桿のいずれか他方に固定し、前記回転シャフトの回転操作で前記背を昇降可能とするものである請求項３記載の椅子の可動構造物のスライド機構。   The movable structure is a back that can be raised and lowered with respect to a back support rod, and the driven side member is fixed to either the back or the back support rod and the drive side member is fixed to the back or the back support. The sliding mechanism for a movable structure of a chair according to claim 3, wherein the sliding mechanism is fixed to either one of the heels so that the back can be raised and lowered by a rotation operation of the rotary shaft. 前記可動構造物は肘支持部材に沿って昇降可能な肘であり、前記被駆動側部材を前記肘又は前記肘支持部材のいずれか一方に固定すると共に前記駆動側部材を前記肘又は前記肘支持部材のいずれか他方に固定し、前記回転シャフトの回転操作で前記肘を昇降可能とするものである請求項３記載の椅子の可動構造物のスライド機構。   The movable structure is an elbow that can be moved up and down along an elbow support member, and the driven side member is fixed to either the elbow or the elbow support member, and the drive side member is supported by the elbow or the elbow support. 4. A sliding mechanism for a movable structure of a chair according to claim 3, wherein the sliding mechanism is fixed to either one of the members, and the elbow can be moved up and down by rotating the rotating shaft. 前記可動構造物は背フレームに対して前後方向に出入り自在なランバーサポートであり、前記被駆動側部材を前記ランバーサポート又は前記背フレームのいずれか一方に固定すると共に前記駆動側部材を前記ランバーサポート又は前記背フレームのいずれか他方に固定し、前記回転シャフトの回転操作で前記ランバーサポートを前後方向に出入り可能とするものである請求項３記載の椅子の可動構造物のスライド機構。   The movable structure is a lumbar support that can enter and exit in the front-rear direction with respect to the back frame, and the driven side member is fixed to either the lumbar support or the back frame and the driving side member is fixed to the lumbar support. 4. The sliding mechanism for a movable structure of a chair according to claim 3, wherein the sliding mechanism is fixed to either one of the back frames and the lumbar support can be moved in and out in the front-rear direction by a rotation operation of the rotating shaft. 前記可動構造物は背支桿に対して昇降可能なヘッドレストであり、前記被駆動側部材を前記ヘッドレスト又は前記背支桿のいずれか一方に固定すると共に前記駆動側部材を前記ヘッドレスト又は前記背支桿のいずれか他方に固定し、前記回転シャフトの回転操作で前記ヘッドレストを昇降可能とするものである請求項３記載の椅子の可動構造物のスライド機構。   The movable structure is a headrest that can be moved up and down with respect to a back support rod. The driven side member is fixed to either the headrest or the back support rod and the drive side member is fixed to the headrest or the back support. The sliding mechanism for a movable structure of a chair according to claim 3, wherein the sliding mechanism is fixed to either one of the heels, and the headrest can be moved up and down by rotating the rotating shaft.
JP2009246325A 2009-10-27 2009-10-27 Reversible rotation transmission mechanism and movable structure of chair using the same Expired - Fee Related JP5498125B2 (en)

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Publication number Priority date Publication date Assignee Title
JP2014083075A (en) * 2012-10-19 2014-05-12 Okamura Corp Position changing device of moving member
JP2021061966A (en) * 2019-10-11 2021-04-22 タカノ株式会社 Chair

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JPS6422137U (en) * 1987-07-24 1989-02-03
JPH08391A (en) * 1994-06-16 1996-01-09 Okamura Corp Vertical adjustment device for seat back
JPH09294646A (en) * 1996-05-07 1997-11-18 Nanba Press Kogyo Kk Movable seat
JPH11253268A (en) * 1998-03-13 1999-09-21 Nissan Shatai Co Ltd Automobile seat
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JP2008125561A (en) * 2006-11-16 2008-06-05 Takano Co Ltd Method and mechanism of reaction adjustment for rocking mechanism

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014083075A (en) * 2012-10-19 2014-05-12 Okamura Corp Position changing device of moving member
JP2021061966A (en) * 2019-10-11 2021-04-22 タカノ株式会社 Chair
JP7330844B2 (en) 2019-10-11 2023-08-22 タカノ株式会社 Chair

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