JP4729753B2 - Manual wheelchair with continuously variable transmission mechanism - Google Patents

Manual wheelchair with continuously variable transmission mechanism Download PDF

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JP4729753B2
JP4729753B2 JP2004197468A JP2004197468A JP4729753B2 JP 4729753 B2 JP4729753 B2 JP 4729753B2 JP 2004197468 A JP2004197468 A JP 2004197468A JP 2004197468 A JP2004197468 A JP 2004197468A JP 4729753 B2 JP4729753 B2 JP 4729753B2
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wheel
continuously variable
body frame
operating
transmission mechanism
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JP2006015025A (en
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宏一 平田
正國 川田
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National Maritime Research Institute
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本発明は、車椅子操作者の負担軽減を図るための無段変速機構を有する手動車椅子に関する。   The present invention relates to a manual wheelchair having a continuously variable transmission mechanism for reducing the burden on a wheelchair operator.

従来の手動車椅子は、電動車椅子と違って一般に変速機構を有してなく、車輪とハンドリム（操作輪）とが機械的に固定され１：１で回転するため、登り坂を走行する場合や路面上の段差を乗り越える場合など、車椅子操作者は過大なトルクをハンドリムに与える必要がある。一方、平坦な路面を高速で走行する場合、車椅子操作者は短い周期あるいは長い行程でハンドリムに回転運動を与える必要があり、過度な負担を受けることとなる。手動車椅子におけるこのような問題を解決するために、車輪に大径の内歯歯車を固定し、ハンドリムを車輪の回転軸心に偏心して取付け、ハンドリムに車輪の内歯歯車と噛合う歯車を固定し、ハンドリムの回転を内歯歯車機構で減速して車輪に伝動するようにしたものが提案されている（特許文献１参照）。また、他の変速機構を有する手動車椅子として、車輪とハンドリムを別軸に取付け、車輪軸とハンドリム軸をタイミングベルトを介して減速して伝動することによって、駆動トルクを低減させ、操作者の負担を軽減するようにしたものも提案されている（特許文献２参照）。一方、上記提案されたものは、何れも固定された減速比をもって車輪を回転させるものであるが、ハンドリム軸と車輪軸間に歯車機構からなる多段変速装置を設け、操作者が操作杆を操作することによって、操作杆に連結した可動索を介して、等速駆動、減速駆動、加速駆動、バック駆動を選択操作できるようにしたものも提案されている（特許文献３）。
特開平０９−２４０６７号公報 特開２００１−２０４７６９号公報 特開２０００−３１６９１４号公報 Unlike conventional electric wheelchairs, conventional manual wheelchairs generally do not have a speed change mechanism, and the wheels and hand rims (control wheels) are mechanically fixed and rotate 1: 1. Wheelchair operators need to apply excessive torque to the hand rim, such as over the top step. On the other hand, when traveling on a flat road at a high speed, the wheelchair operator needs to apply a rotational motion to the hand rim in a short cycle or a long stroke, and an excessive burden is imposed. In order to solve such problems in manual wheelchairs, a large-diameter internal gear is fixed to the wheel, the hand rim is eccentrically mounted on the rotational axis of the wheel, and a gear that meshes with the internal gear of the wheel is fixed to the hand rim. However, there has been proposed one in which the rotation of the hand rim is decelerated by an internal gear mechanism and transmitted to the wheels (see Patent Document 1). In addition, as a manual wheelchair having another speed change mechanism, the wheel and the hand rim are attached to different shafts, and the wheel shaft and the hand rim shaft are decelerated through a timing belt to reduce the driving torque, thereby reducing the burden on the operator. There is also proposed one that reduces the above (see Patent Document 2). On the other hand, all of the above proposed ones rotate the wheel with a fixed reduction ratio, but a multi-stage transmission comprising a gear mechanism is provided between the hand rim shaft and the wheel shaft, and the operator operates the operating rod. By doing so, there has been proposed one that can select and operate at a constant speed drive, a deceleration drive, an acceleration drive, and a back drive via a movable cable connected to an operation rod (Patent Document 3).
Japanese Patent Laid-Open No. 09-24067 JP 2001-204769 A JP 2000-316914 A

上記提案されている従来の手動車椅子は、ハンドリムから車輪への回転駆動は特定の減速比に固定されているもの、或は多段変速が可能であるが所定の歯車の噛合い比を択一的に選択するものであり、何れも所定の変速比しか選択できず、路面や走行の条件に応じて自由に任意に変速比を変えることができないので、車椅子操作者の負担を軽減するのにいまだ満足するものではない。また、多段変速機構を有するものは、構造が複雑であり、それだけ保守点検及び軽量化に不利であるという問題点もある。   In the conventional manual wheelchair proposed above, the rotational drive from the hand rim to the wheel is fixed at a specific reduction ratio, or multi-speed shifting is possible, but a predetermined gear meshing ratio is alternatively selected. In both cases, only a predetermined gear ratio can be selected, and the gear ratio cannot be changed arbitrarily according to the road surface and driving conditions, so it is still necessary to reduce the burden on the wheelchair operator. Not satisfied. In addition, those having a multi-stage transmission mechanism have a problem in that the structure is complicated, which is disadvantageous for maintenance and inspection and weight reduction.

そこで、本発明は、路面や走行の状況に応じて、車輪とハンドリムとの回転比を任意に変化させ、それを保持することができ、車椅子操作者の負担を軽減することができ、且つ構造が簡単で軽量化が図られ、保守点検も容易である手動車椅子を提供することを目的とする。   Therefore, the present invention can arbitrarily change the rotation ratio between the wheel and the hand rim according to the road surface and the traveling situation, can hold it, can reduce the burden on the wheelchair operator, and has a structure. An object of the present invention is to provide a manual wheelchair that is simple, lightweight, and easy to maintain.

上記課題を解決する本発明の手動車椅子は、本体フレーム、該本体フレームに回転可能に設けられた車輪、該車輪を手動により回転駆動するハンドリムを有する手動車椅子において、前記車輪と前記ハンドリムが前記本体フレームに設けられた主軸受部材によって同一軸心回りに回転可能となっており、該ハンドリムと前記車輪が無段変速機構を介して伝動し、該無段変速機構が、作動面が同一中心の球面と接する凹環状曲面からなる入力回転板と出力回転板、及び前記入力回転板と前記出力回転板の前記作動面に接触するローラを有し前記球面の中心を支点として変速操作手段により揺動運動する伝達ローラ組立体とからなり、前記伝達ローラ組立体は、前記入力回転板の作動面と摩擦接触して回転する接触面を有する入力側伝達ローラと、前記出力回転板の作動面と摩擦接触して回転する接触面を有する出力側伝達ローラとが伝達軸に一体に固定され、該伝達軸が伝達軸受部材に回転自在に軸受されて構成され、前記変速操作手段は、前記伝達軸受部材に設けられた作動ロッドと、前記主軸受部材に揺動可能に設けられ前記作動ロッドの基端部が揺動可能に軸着されたレバー部材と、前記レバー部材に設けられたバネとを有し、前記出力回転板が前記車輪のボス部を兼ね、前記無段変速機構が前記本体フレームの外側に設けられ、前記変速操作手段を可撓性伝動軸を介して操作者が運転中に変速操作を行うことができる変速操作レバーにより動作させたことを特徴とするものである。 The manual wheelchair of the present invention that solves the above-mentioned problems is a manual wheelchair having a main body frame, a wheel rotatably provided on the main body frame, and a hand rim for manually rotating the wheel, and the wheel and the hand rim are the main body. The main bearing member provided on the frame can rotate around the same axis, and the hand rim and the wheel are transmitted via a continuously variable transmission mechanism, and the continuously variable transmission mechanism has an operating surface of the same center. An input rotary plate and an output rotary plate made of a concave annular curved surface in contact with the spherical surface, and a roller that contacts the operating surface of the input rotary plate and the output rotary plate, and swings by a speed change operation means with the center of the spherical surface as a fulcrum. composed of a transfer roller assembly for movement, said transmission roller assembly includes an input-side transmission roller having a contact surface which rotates in frictional contact with the operating surface of the input rotary plate An output-side transmission roller having a contact surface that rotates in frictional contact with the operating surface of the output rotating plate is integrally fixed to a transmission shaft, and the transmission shaft is rotatably supported by a transmission bearing member. The speed change operation means includes an operating rod provided on the transmission bearing member, a lever member provided on the main bearing member so as to be swingable, and a base end portion of the operating rod being pivotally mounted on the lever, and the lever A spring provided on the member, the output rotating plate also serves as a boss part of the wheel, the continuously variable transmission mechanism is provided outside the main body frame, and the speed change operation means is a flexible transmission shaft. Thus, the operation is performed by a shift operation lever that allows an operator to perform a shift operation during driving.

前記無段変速機構を左右の車輪に取付けることによって、両方の車輪を連結する軸を設けなくてもよく、車椅子を容易に折畳み可能に構成することができる。前記無段変速機構は、前記入力回転板がハンドリムと一体に回転し、前記出力回転板が車輪と一体に回転するように構成することによって、小型・単純化・軽量化が可能となる。また、前記出力回転板が車輪のボス部を兼ね、前記無段変速機構を本体フレームの外側に設けることによって、より簡素軽量化ができる。また、前記変速機構の前記伝達ローラ組立体をワイヤ−又はリンク機構、あるいはこれらの組合せにより揺動させることにより変速操作でき、操作者が容易に操作することができる。前記左右の車輪を分離した車軸に支持し、本体フレームを折畳み可能に構成することにより、持ち運びや収納が容易となる。 By attaching the continuously variable transmission mechanism to the left and right wheels, there is no need to provide a shaft for connecting both wheels, and the wheelchair can be easily folded. The continuously variable transmission mechanism can be reduced in size, simplified, and reduced in weight by configuring the input rotating plate to rotate integrally with the hand rim and the output rotating plate to rotate integrally with the wheel. Further, the output rotating plate also serves as a boss portion of the wheel, and the continuously variable transmission mechanism is provided on the outer side of the main body frame, whereby the weight can be further simplified . Further, the transmission roller assembly of the transmission mechanism can be changed by swinging it with a wire, a link mechanism, or a combination thereof, and can be easily operated by an operator. The left and right wheels are supported on separate axles, and the main body frame is configured to be foldable, thereby facilitating carrying and storage.

以上のように、本発明の手動車椅子によれば、路面や走行の状況に応じて、車輪とハンドリムとの回転比を任意に変化させ、それを保持することができるので、車椅子操作者の負担を軽減することができる。さらに、無段変速機構の構成を単純で小型軽量化でき、かつ、出力回転板が車輪のボス部を兼ねているので、それだけ部品点数を減らすことができ、より小型軽量化ができる。しかも容易に且つ確実に無段変速操作ができ、保守点検も容易である。
さらに、請求項２の構成によれば、左右を均等に変速させることができ運転が容易で且つ、両方の車輪を連結する軸を設けなくてもよいので、車椅子を容易に折畳み可能に構成することができる。
そして、請求項３の構成によれば、持ち運びや収納が容易となる。 As described above, according to the manual wheelchair of the present invention, it is possible to arbitrarily change the rotation ratio between the wheel and the hand rim according to the road surface and the traveling situation, and to hold it, so that it is a burden on the wheelchair operator. Can be reduced. Furthermore, the configuration of the continuously variable transmission mechanism can be simplified and reduced in size and weight, and the output rotating plate also serves as the boss portion of the wheel. Therefore, the number of parts can be reduced accordingly, and further reduction in size and weight can be achieved. In addition, a continuously variable transmission can be easily and reliably performed, and maintenance and inspection are easy.
Further, according to the configuration of claim 2, the left and right can be evenly shifted, the operation is easy, and it is not necessary to provide a shaft for connecting both wheels, so that the wheelchair can be easily folded. it is possible.
Their, according to the third aspect, it is easy to carry and storage.

以下、本発明に係る無段変速機構を有する手動車椅子の実施形態を図面に基づき詳細に説明する。
図１は、本実施形態に係る無段変速機構を有する手動車椅子５０の概念図であり、（ａ）はその側面図、（ｂ）は背面概念図である。図２は車輪、ハンドリム及び無段変速機構部の断面正面図である。
図中、１は車輪、２はハンドリムであり、後述する無段変速機構３を介して車輪とハンドリムは同軸的に取付けられている。ハンドリム２のボス部材５は、車椅子の本体フレーム４に固定されている主軸受部材６に軸受されている固定軸７に回転自在に軸受され、且つボス部材５には固定軸７の外周に回転自在に嵌合するスリーブ部材８が内方に突出するように一体に形成されている。そして、スリーブ部材８の端部には、無段変速機構３を構成する入力回転板１０がキー止めされ、ハンドリム２と入力回転板１０が一体に回転するようになっている。出力回転板は、固定軸７に対してはベアリングにより回転自在に支持されている。一方、車輪１のボス部材は、変速機構の出力回転板１２を兼ねており、前記スリーブ部材８の外周にベアリング１３により回転自在に軸受けされている。本体フレームは、図示してないが、公知の折畳み可能な手動車椅子と同様に、任意の手段で折畳み可能に構成されている。 Hereinafter, an embodiment of a manual wheelchair having a continuously variable transmission mechanism according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a conceptual diagram of a manual wheelchair 50 having a continuously variable transmission mechanism according to the present embodiment, where (a) is a side view thereof and (b) is a rear conceptual diagram. FIG. 2 is a cross-sectional front view of the wheel, the hand rim, and the continuously variable transmission mechanism.
In the drawing, 1 is a wheel, 2 is a hand rim, and the wheel and the hand rim are coaxially attached via a continuously variable transmission mechanism 3 described later. The boss member 5 of the hand rim 2 is rotatably supported by a fixed shaft 7 that is supported by a main bearing member 6 that is fixed to the body frame 4 of the wheelchair, and the boss member 5 is rotated around the outer periphery of the fixed shaft 7. The sleeve member 8 that fits freely is integrally formed so as to protrude inward. An input rotary plate 10 constituting the continuously variable transmission mechanism 3 is keyed to the end of the sleeve member 8 so that the hand rim 2 and the input rotary plate 10 rotate integrally. The output rotating plate is rotatably supported by a bearing with respect to the fixed shaft 7. On the other hand, the boss member of the wheel 1 also serves as the output rotating plate 12 of the speed change mechanism, and is rotatably supported by the bearing 13 on the outer periphery of the sleeve member 8. Although not shown, the main body frame is configured to be foldable by any means as in a known foldable manual wheelchair.

本実施形態の変速機構は、図３〜図６に詳細に示すように、同一軸心回りに回転する入力回転板１０、出力回転板１２、前記入力回転板１０と出力回転板１２間の回転力を伝達する伝達ローラ組立体１４、及び該伝達ローラ組立体１４を揺動させる変速操作手段１５とから構成されている。前記入力回転板１０と出力回転板１２は、作動面が同一中心の球面と接する凹環状曲面となるように形成された作動面１７、１８を有し、作動面１７、１８が常に同一円周面に位置する状態を保持して、回転駆動される。一方、伝達ローラ組立体１４は、入力回転板１０の作動面１７と摩擦接触して回転する接触面を有する入力側伝達ローラ２０と、出力回転板１２の作動面１８と摩擦接触して回転する接触面を有する出力側伝達ローラ２１とが伝達軸２２に一体に固定され、該伝達軸２２が伝達軸受部材２３に回転自在に軸受されて構成されている。前記入力側伝達ローラ２０と出力側伝達ローラ２１の外周面は、作動面１７、１８と同一曲率の円弧面となっており、伝達ローラ組立体が作動面１７、１８の球中心Ｏを中心として揺動することにより、作動面１７、１８との接触を保ったまま揺動して作動面との接触位置を任意に変えることができ、それにより後述するように無段変速を可能にしている。 As shown in detail in FIGS. 3 to 6, the speed change mechanism of the present embodiment includes an input rotary plate 10 that rotates about the same axis, an output rotary plate 12, and rotation between the input rotary plate 10 and the output rotary plate 12. A transmission roller assembly 14 for transmitting force and a speed change operating means 15 for swinging the transmission roller assembly 14 are configured. The input rotary plate 10 and the output rotary plate 12 have operating surfaces 17 and 18 formed so that the operating surfaces are concave annular curved surfaces that are in contact with a spherical surface having the same center, and the operating surfaces 17 and 18 are always the same circumference. It is rotationally driven while maintaining the state located on the surface. On the other hand, the transmission roller assembly 14 rotates in frictional contact with the input-side transmission roller 20 having a contact surface that rotates in frictional contact with the operating surface 17 of the input rotating plate 10 and the operating surface 18 of the output rotating plate 12. An output-side transmission roller 21 having a contact surface is integrally fixed to a transmission shaft 22, and the transmission shaft 22 is rotatably supported by a transmission bearing member 23 . The outer peripheral surfaces of the input side transmission roller 20 and the output side transmission roller 21 are circular arc surfaces having the same curvature as the operation surfaces 17 and 18, and the transmission roller assembly is centered on the spherical center O of the operation surfaces 17 and 18. By swinging, the contact position with the operating surface can be arbitrarily changed while maintaining contact with the operating surfaces 17 and 18, thereby enabling a continuously variable transmission as will be described later. .

伝達ローラ組立体１４が作動面１７、１８の球中心Ｏを支点に揺動可能にするために、次のような構成から変速操作手段１５を有している。
即ち、伝達軸受部材２３の中央下部に下方に突出する作動ロッド２４が設けられ、該作動ロッド２４の基端部が、車椅子のフレームに固定された主軸受部材６の下端に揺動可能に設けられたレバー部材２５に、球中心Ｏに位置するピポット軸２６を介して揺動可能に軸着されている。作動ロッド２４の下端部は、本体フレームの適所に設けられた変速操作レバーに連結された可撓性伝動軸（ワイヤー）２７が連結されている。また、作動ロッド２４は、図３に明示するように、レバー部材２５との間に、可撓性伝動軸２７の引っ張り方向と逆向きに引っ張る引っ張りバネ３０が懸架され、常に可撓性伝動軸２７の引っ張り方向と逆向きに伝達ローラ組立体１４が揺動するように付勢している。それにより、操作者が変速操作レバーを引っ張り方向に操作することによって、図３において反時計方向（増速側）に揺動し、操作レバーを戻すことによって引っ張りバネ３０の張力によって時計方向（減速側）に揺動する。さらに、レバー部材２５と主軸受部材６との間には、引っ張りバネ３１が設けられ、前記伝達ローラ組立体１４の入力側伝達ローラ２０及び出力側伝達ローラ２１が常に作動面１７、１８に適度の圧力で接触するように付勢されている。 In order to enable the transmission roller assembly 14 to swing around the spherical center O of the operating surfaces 17 and 18, the transmission roller assembly 14 includes a speed change operating means 15 having the following configuration.
That is, an operating rod 24 projecting downward is provided at the lower center of the transmission bearing member 23 , and the base end portion of the operating rod 24 is swingably provided at the lower end of the main bearing member 6 fixed to the frame of the wheelchair. The lever member 25 is pivotally mounted via a pivot shaft 26 located at the sphere center O so as to be swingable. A flexible transmission shaft (wire) 27 connected to a speed change lever provided at an appropriate position of the main body frame is connected to the lower end portion of the operating rod 24. Further, as clearly shown in FIG. 3, a tension spring 30 that pulls the actuating rod 24 in a direction opposite to the pulling direction of the flexible transmission shaft 27 is suspended between the lever member 25 and the flexible transmission shaft. The transmission roller assembly 14 is biased so as to swing in the direction opposite to the pulling direction of 27. Accordingly, when the operator operates the speed change operation lever in the pulling direction, it swings in the counterclockwise direction (acceleration side) in FIG. 3, and when the operation lever is returned, the tension is applied in the clockwise direction (deceleration). To the side). Further, a tension spring 31 is provided between the lever member 25 and the main bearing member 6, and the input side transmission roller 20 and the output side transmission roller 21 of the transmission roller assembly 14 are always appropriately placed on the operating surfaces 17 and 18. It is urged to contact at a pressure of.

本実施形態の変速機構付き手動車椅子は、以上のように構成され、操作者がハンドリムを回転することによって、その回転力は、ハンドリムのボス部材５−入力回転板１０−入力側伝達ローラ２０−伝達軸２２−出力側伝達ローラ２１−出力回転板（車輪のボス部材）１２−車輪１の順に伝達されて車輪が回転駆動される。図２〜図４は、変速機構の伝達ローラ組立体１４が中立位置にある状態を示し、この状態ではハンドリムと車輪は１：１の比で回転し、平坦な路面等を通常の速度で走行する。いま、登り坂や路面上の段差を乗り越える場合など、過大なトルクを必要とする場合は、操作レバーを操作して可撓性伝動軸２７を引張方向に操作することによって、伝達ローラ組立体１４を図２において反時計方向に所定角度揺動させる。それにより、図５に示す状態となり、入力側伝達ローラ２０は入力回転板１０の作動面１７の回転半径が小さい方向に移動し、その分入力側伝達ローラの回転が減速される。   The manual wheelchair with a speed change mechanism according to the present embodiment is configured as described above, and when the operator rotates the hand rim, the rotational force is generated by the boss member of the hand rim 5 -the input rotating plate 10 -the input side transmission roller 20-. Transmission wheel 22-output side transmission roller 21-output rotating plate (wheel boss member) 12-wheel 1 are transmitted in this order, and the wheel is driven to rotate. 2 to 4 show a state in which the transmission roller assembly 14 of the speed change mechanism is in a neutral position. In this state, the hand rim and the wheel rotate at a ratio of 1: 1 and travel on a flat road surface at a normal speed. To do. Now, when excessive torque is required, such as when climbing uphills or oversteps on the road surface, the transmission roller assembly 14 is operated by operating the operation lever to operate the flexible transmission shaft 27 in the pulling direction. 2 is swung counterclockwise by a predetermined angle in FIG. As a result, the state shown in FIG. 5 is reached, and the input side transmission roller 20 moves in the direction in which the rotation radius of the operating surface 17 of the input rotary plate 10 is small, and the rotation of the input side transmission roller is decelerated accordingly.

一方、出力側伝達ローラ２１は、出力回転板１２の作動面との接触半径が大きくなるので、高トルクを生じることができ、操作者の負担を軽減することができる。また、平坦面等負荷の少ない場所を高速で走行したい場合は、操作レバーを前記と反対方向に操作することによって、図６に示す状態となり、入力側伝達ローラ２０は入力回転板１０の作動面１７の回転半径が大きい方向に移動し、その分入力側伝達ローラの回転が増速される。一方、出力側伝達ローラ２１は、出力回転板１２の作動面との接触半径が小さくなるので、回転トルクが増大すると共に出力回転板の回転速度を増速させることができる。この状態は、逆に車輪の側から見ればハンドリムに対して減速・高トルクとなるので、例えば下り坂を走行する場合、操作者が楽にハンドリムの回転を制御でき、スピードの発生を抑え、安全に下り坂を走行することができる。   On the other hand, since the output side transmission roller 21 has a large contact radius with the operating surface of the output rotating plate 12, high torque can be generated and the burden on the operator can be reduced. Further, when it is desired to travel at a high speed on a place with a small load such as a flat surface, by operating the operation lever in the opposite direction, the state shown in FIG. The rotational radius of 17 is moved in the larger direction, and the rotation of the input side transmission roller is increased accordingly. On the other hand, since the output side transmission roller 21 has a small contact radius with the operating surface of the output rotary plate 12, the rotational torque can be increased and the rotational speed of the output rotary plate can be increased. On the other hand, when viewed from the side of the wheel, this state is slow and high torque with respect to the hand rim.For example, when driving downhill, the operator can easily control the rotation of the hand rim, suppress the generation of speed, and be safe. You can drive downhill.

このように、本発明の変速機構は、伝達ローラ組立体の揺動角度に応じて、連続的に変速することが可能であり、負荷に応じて操作者が任意に調整することが可能であり、従来の手動車椅子に比べて楽に且つ安全に走行することができる。   Thus, the speed change mechanism of the present invention can continuously change the speed according to the swing angle of the transmission roller assembly, and can be arbitrarily adjusted by the operator according to the load. Compared to a conventional manual wheelchair, it is possible to travel comfortably and safely.

図７は、参考実施形態を示す、本参考実施形態の手動車椅子５１は、前記実施形態と比べて無段変速機構を本体フレームの内側に設けた点が相違している。図８はその変速機構の正面断面図であり、前記実施形態の図３に相当するものである。前記実施形態と同様な部材は同一符号を付し、相違点のみについて説明する。 Figure 7 shows a referential embodiment, a manual wheelchair 51 according to this reference embodiment, in that the continuously variable transmission mechanism in comparison with the embodiment is provided on the inner side of the main frame are different. FIG. 8 is a front sectional view of the speed change mechanism, and corresponds to FIG. 3 of the above embodiment. The same members as those in the above embodiment are given the same reference numerals, and only the differences will be described.

本参考実施形態においては、本体フレームに取付けられた主軸受部材６に車輪１のボス部材４０から内方に伸びる中空車輪軸４１が回転自在に軸受され、該中空車輪軸４１の内側端部に出力回転板１２がキー止めされて固定され、車輪と一体に回転可能となっている。一方、ハンドリム２のボス部材５に固定されたハンドリム軸４２が回転自在に嵌合しており、その内側端部は前記出力回転板１２から内方に突出し、その先端部に入力回転板１０が固定されている。前記入力回転板と出力回転板のそれぞれの作動面が同一の球面と接触するような関係で配置されることは前記実施形態と同様である。そして前記実施形態と同様に、入力回転板１０と出力回転板１２のそれぞれの作動面１７、１８に摩擦接触するように入力側伝達ローラ２０、出力側伝達ローラ２１を有する伝達ローラ組立体１４が配置されている。以上のように本参考実施形態では、無段変速機構３が本体フレーム４の内側に取付けられているので、それだけハンドリム及び車輪が本体フレームの外側に突出する位置を本体フレーム側に近づけることができ、全体としての幅を小さくすることができる。 In the present embodiment, a hollow wheel shaft 41 extending inwardly from the boss member 40 of the wheel 1 is rotatably supported by the main bearing member 6 attached to the main body frame. The output rotating plate 12 is fixed with a key, and can rotate integrally with the wheel. On the other hand, a hand rim shaft 42 fixed to the boss member 5 of the hand rim 2 is rotatably fitted, its inner end protrudes inward from the output rotary plate 12, and the input rotary plate 10 is at its tip. It is fixed. It is the same as that of the said embodiment that each operation surface of the said input rotary plate and an output rotary plate is arrange | positioned so that the same spherical surface may contact. Similarly to the above-described embodiment, the transmission roller assembly 14 having the input-side transmission roller 20 and the output-side transmission roller 21 so as to make frictional contact with the operation surfaces 17 and 18 of the input rotation plate 10 and the output rotation plate 12 is provided. Has been placed. As described above, in the present embodiment , the continuously variable transmission mechanism 3 is attached to the inside of the main body frame 4, so that the position where the hand rim and the wheel protrude to the outside of the main body frame can be made closer to the main body frame side. The overall width can be reduced.

本発明の手動車椅子は、無段変速機構を有し、路面や走行の状況に応じて、車輪とハンドリムとの回転比を任意に変化させ、それを保持することができる構造であるので、車椅子操作者の負担を軽減することができ、しかもハンドリムと車輪が同軸的に設けてあるので、変速機構のない従来の手動車椅子と同様小型軽量化にでき、屋内外を走行する手動車椅子として広く利用できるものである。   Since the manual wheelchair of the present invention has a continuously variable transmission mechanism and can change the rotation ratio between the wheel and the hand rim arbitrarily according to the road surface and traveling conditions, the wheelchair can be held. The burden on the operator can be reduced, and the hand rim and wheels are coaxially arranged, making it possible to reduce the size and weight as with a conventional manual wheelchair without a speed change mechanism, and widely used as a manual wheelchair traveling indoors and outdoors. It can be done.

本発明の実施形態に係る手動車椅子の概念図であり、（ａ）は側面図、（ｂ ）は背面図である。It is a conceptual diagram of the manual wheelchair which concerns on embodiment of this invention, (a) is a side view, (b) is a rear view. 車輪・ハンドリム及び無段変速機構部を示す正面断面図である。It is front sectional drawing which shows a wheel and a hand rim, and a continuously variable transmission mechanism part. 図２の要部断面拡大図である。It is a principal part cross-sectional enlarged view of FIG. その背面図である。FIG. 無段変速機構が減速状態になっている状態の図４相当背面図である。FIG. 5 is a rear view corresponding to FIG. 4 in a state where the continuously variable transmission mechanism is in a deceleration state. 無段変速機構が増速状態になっている状態の図４相当背面図である。FIG. 5 is a rear view corresponding to FIG. 4 in a state where the continuously variable transmission mechanism is in an accelerated state. 参考実施形態に係る手動車椅子の背面概念図である。It is a back surface conceptual diagram of the manual wheelchair which concerns on reference embodiment . 車輪・ハンドリム及び無段変速機構部を示す要部拡大正面断面図である。It is a principal part expanded front sectional view which shows a wheel, a hand rim, and a continuously variable transmission mechanism part.

１ 車輪 ２ ハンドリム
３ 無段変速機構 ４ 本体フレーム
５、１１、４０ ボス部材 ６ 主軸受部材
７ 固定軸 ８ スリーブ部材
１０ 入力回転板 １２ 出力回転板
１３ ベアリング １４ 伝達ローラ組立体
１５ 変速操作手段 １７、１８ 作動面
２０ 入力側伝達ローラ ２１ 出力側伝達ローラ
２２ 伝達軸 ２３ 伝達軸受部材
２４ 作動ロッド ２５ レバー部材
２６ ピポット軸 ２７ 可撓性伝動軸（ワイヤー）
３０、３１ 引っ張りバネ ４１ 中空車輪軸
４２ ハンドリム軸 ５０、５１ 手動車椅子 DESCRIPTION OF SYMBOLS 1 Wheel 2 Hand rim 3 Continuously variable transmission mechanism 4 Main body frame 5, 11, 40 Boss member 6 Main bearing member 7 Fixed shaft 8 Sleeve member 10 Input rotating plate 12 Output rotating plate 13 Bearing 14 Transmission roller assembly 15 Shifting operation means 17, DESCRIPTION OF SYMBOLS 18 Acting surface 20 Input side transmission roller 21 Output side transmission roller 22 Transmission shaft 23 Transmission bearing member 24 Actuation rod 25 Lever member 26 Pivot shaft 27 Flexible transmission shaft (wire)
30, 31 Tension spring 41 Hollow wheel shaft 42 Hand rim shaft 50, 51 Manual wheelchair

Claims (3)

本体フレーム、該本体フレームに回転可能に設けられた車輪、該車輪を手動により回転駆動するハンドリムを有する手動車椅子において、前記車輪と前記ハンドリムが前記本体フレームに設けられた主軸受部材によって同一軸心回りに回転可能となっており、該ハンドリムと前記車輪が無段変速機構を介して伝動し、
該無段変速機構が、作動面が同一中心の球面と接する凹環状曲面からなる入力回転板と出力回転板、及び前記入力回転板と前記出力回転板の前記作動面に接触するローラを有し前記球面の中心を支点として変速操作手段により揺動運動する伝達ローラ組立体とからなり、
前記伝達ローラ組立体は、前記入力回転板の作動面と摩擦接触して回転する接触面を有する入力側伝達ローラと、前記出力回転板の作動面と摩擦接触して回転する接触面を有する出力側伝達ローラとが伝達軸に一体に固定され、該伝達軸が伝達軸受部材に回転自在に軸受されて構成され、
前記変速操作手段は、前記伝達軸受部材に設けられた作動ロッドと、前記主軸受部材に揺動可能に設けられ前記作動ロッドの基端部が揺動可能に軸着されたレバー部材と、前記レバー部材に設けられたバネとを有し、
前記出力回転板が前記車輪のボス部を兼ね、前記無段変速機構が前記本体フレームの外側に設けられ、
前記変速操作手段を可撓性伝動軸を介して操作者が運転中に変速操作を行うことができる変速操作レバーにより動作させたことを特徴とする手動車椅子。 In a manual wheelchair having a main body frame, a wheel rotatably provided on the main body frame, and a hand rim for manually rotating the wheel, the wheel and the hand rim are coaxially arranged by a main bearing member provided on the main body frame. The hand rim and the wheel are transmitted via a continuously variable transmission mechanism,
The continuously variable transmission mechanism includes an input rotary plate and an output rotary plate made of a concave annular curved surface whose operating surfaces are in contact with a spherical surface having the same center, and a roller that contacts the operating surfaces of the input rotary plate and the output rotary plate. A transmission roller assembly that swings with a shift operation means about the center of the spherical surface,
The transmission roller assembly includes an input-side transmission roller having a contact surface that rotates in frictional contact with the operating surface of the input rotating plate, and an output having a contact surface that rotates in frictional contact with the operating surface of the output rotating plate. The side transmission roller is integrally fixed to the transmission shaft, and the transmission shaft is rotatably supported by the transmission bearing member.
The speed change operating means includes an operating rod provided on the transmission bearing member, a lever member swingably provided on the main bearing member, and a base end portion of the operating rod pivotally attached to the main shaft member, A spring provided on the lever member,
The output rotating plate also serves as a boss portion of the wheel, and the continuously variable transmission mechanism is provided outside the main body frame,
A manual wheelchair characterized in that the shift operation means is operated by a shift operation lever through which a shift operation can be performed by an operator through a flexible transmission shaft. 前記無段変速機構が左右の前記車輪に取付けられていることを特徴とする請求項１に記載の手動車椅子。   The manual wheelchair according to claim 1, wherein the continuously variable transmission mechanism is attached to the left and right wheels. 左右の前記車輪が分離した車軸に支持され、前記本体フレームが折畳み可能になっていることを特徴とする請求項２に記載の手動車椅子。 The manual wheelchair according to claim 2 , wherein the left and right wheels are supported by separate axles, and the main body frame is foldable.
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JPH02128851U (en) * 1989-03-31 1990-10-24
JP2000316914A (en) * 1999-05-10 2000-11-21 Yasuyuki Yamamoto Wheel chair transmission
JP2001120602A (en) * 1999-10-22 2001-05-08 Konan Giken:Kk Wheelchair for nursing care to which monocycle is connected
JP2001204769A (en) * 2000-01-25 2001-07-31 Masaru Tomiyama Manual wheelchair
JP2003033403A (en) * 2001-07-23 2003-02-04 Seishiro Yoshihara Wheelchair gear mechanism and planetary gear mechanism

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JPS4927762A (en) * 1972-06-30 1974-03-12
JPH0132379B2 (en) * 1982-05-14 1989-06-30 Nippon Seiko Kk
JPH02128851U (en) * 1989-03-31 1990-10-24
JP2000316914A (en) * 1999-05-10 2000-11-21 Yasuyuki Yamamoto Wheel chair transmission
JP2001120602A (en) * 1999-10-22 2001-05-08 Konan Giken:Kk Wheelchair for nursing care to which monocycle is connected
JP2001204769A (en) * 2000-01-25 2001-07-31 Masaru Tomiyama Manual wheelchair
JP2003033403A (en) * 2001-07-23 2003-02-04 Seishiro Yoshihara Wheelchair gear mechanism and planetary gear mechanism

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