【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は、脚の回旋負荷運動によ
り、股関節周囲の回旋筋及び膝関節の安定性を強化する
運動具の回旋負荷装置の改良発明に関する。
【０００２】
【従来の技術】特開平１０−７６０２４
【０００３】
【発明が解決しようとする課題】上記従来の技術は、回
旋台の回旋負荷方向が一方向の為に足のかかとを回旋軸
にして、つま先を閉じる内旋運動の足位置に対して、つ
ま先を開く外旋運動の足位置を反対向きに変えるわずら
わしさがあった。
【０００４】
【課題を解決するための手段】上記目的を達成するた
め、本発明の回旋負荷装置は、三方向に分岐したチェー
ンの一方を引きバネに掛止して、他の二方を回旋台と連
動して回旋するチェーン係止部材の両端部に各係止した
ものである。
【０００５】
【作用】上記の機構により、回旋台が一方向に回旋する
時、連動して回旋するチェーン係止部材の両端部に係止
された各チェーンの一方が引かれ、さらに三方分岐部材
で連接したチェーンを引き、該チェーンに掛止した引き
バネを伸長する。また、回旋台が反対方向に回旋する時
は、チェーン係止部材の他の端部に係止した一方のチェ
ーンが引かれ、同じく三方分岐部材を伝わって引きバネ
を掛止したチェーンを引く。
【０００６】また、チェーン係止部材の形状により、回
旋変位角とバネのバネ定数が反比例した関係になるの
で、回旋角の進度に対してトルクの変化が少ない回旋負
荷となる。
【０００７】
【実旋例】以下、本発明の回旋負荷装置の実施例を図面
を参照して説明する。図１において、回旋台２に固着し
たボルト軸３を、ベアリングを挟んで基体１に軸支し、
両端部にチェーン係止部を設けたチェーン係止部材４
を、ベアリングを挟んでボルト軸３にナットで固定し、
さらに溶接等で強固に固着する。
【０００８】概チェーン係止部材４の両端部に、チェー
ン５ａ、５ｂの端部を各係止し、他の端部を三方分岐部
材６に各係止する。さらに、該三方分岐部材６の他の係
止部に、引バネ８を掛止したチェーン７を係止する。
【０００９】引きバネ８を掛止したバネ掛止部材９を、
負荷調節ロッド１１に螺嵌して、負荷調節ノブ１０の回
動によりバネ掛止部材９をスライドさせ、引きバネ８の
抗張力を増減させる。
【００１０】図２において、回旋台２を矢印Ａの方向に
回旋する時、チェーン係止部材４も連動して回旋し、チ
ェーン５ａは引かれ、チェーン５ｂは弛む。さらにチェ
ーン５ａの張力が三方分岐部材６及びチェーン７に伝わ
り、引きバネ８を伸長する。また、反対に回旋台２が矢
印Ｂの方向に回旋する時チェーン５ｂが引かれチェーン
５ａは弛む。さらにチェーン５ｂの張力が三方分岐部材
６及びチェーン７に伝わり引きバネ８を伸長する。
【００１１】
【効果】以上のように、本発明は、脚の回旋運動におい
て、足のかかとを回旋軸としてつま先を閉じる内旋運動
及びつま先を開く外旋運動が足位置を変えずに間断なく
行える。製作簡易で堅牢な、脚の回旋運動具である。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a rotation load device of an exercise tool for enhancing the stability of the circumflex muscle around the hip joint and the knee joint by the rotation load movement of the leg. Related to the invention. 2. Description of the Related Art In the above-mentioned prior art, the heel of the foot is used as a rotation axis because the rotation load direction of the turntable is one direction. Therefore, there is annoying change of the foot position of the external rotation motion of opening the toe in the opposite direction to the foot position of the internal rotation motion of closing the toe. [0004] In order to achieve the above object, a rotating load device of the present invention locks one of the chains branched in three directions by a tension spring and rotates the other two directions. The chain is locked at both ends of a chain locking member that rotates in conjunction with the table. According to the above mechanism, when the turntable rotates in one direction, one of the chains locked at both ends of the chain locking member which rotates in conjunction with it is pulled, and the three-way branch member is further rotated. To pull the chain connected thereto, and extend the tension spring hooked on the chain. When the turntable rotates in the opposite direction, one of the chains locked to the other end of the chain locking member is pulled, and the chain is also transmitted along the three-way branch member to pull the chain hooked by the pull spring. [0006] Further, since the rotational displacement angle and the spring constant of the spring have an inversely proportional relationship depending on the shape of the chain locking member, the rotational load has a small change in torque with respect to the advance of the rotational angle. An embodiment of a rotary load device according to the present invention will be described below with reference to the drawings. In FIG. 1, a bolt shaft 3 fixed to a rotary table 2 is supported on a base 1 with a bearing interposed therebetween.
Chain locking member 4 provided with chain locking portions at both ends
Is fixed to the bolt shaft 3 with a nut across the bearing,
Furthermore, it is firmly fixed by welding or the like. The ends of the chains 5 a and 5 b are locked at both ends of the chain locking member 4, and the other ends are locked to the three-way branching member 6. Further, the chain 7 on which the extension spring 8 is hooked is locked to another locking portion of the three-way branch member 6. The spring retaining member 9 retaining the extension spring 8 is
The spring engaging member 9 is slid onto the load adjusting rod 11 by turning the load adjusting knob 10, and the tensile force of the pull spring 8 is increased or decreased. In FIG. 2, when the turntable 2 is turned in the direction of arrow A, the chain locking member 4 is also turned in conjunction with the turn, whereby the chain 5a is pulled and the chain 5b is loosened. Further, the tension of the chain 5a is transmitted to the three-way branch member 6 and the chain 7, and the extension spring 8 is extended. On the other hand, when the turntable 2 rotates in the direction of arrow B, the chain 5b is pulled and the chain 5a is slackened. Further, the tension of the chain 5b is transmitted to the three-way branch member 6 and the chain 7, and the extension spring 8 is extended. As described above, according to the present invention, in the rotation movement of the leg, the inner rotation movement for closing the toe and the outer rotation movement for opening the toe with the heel of the foot as the rotation axis are performed without changing the position of the foot without interruption. I can do it. It is a simple and robust leg rotation exercise tool.
【図面の簡単な説明】
【図１】は、回旋負荷装置の底面図、
【図２】は作動状態の底面図、
【図３】は側面図。
【符号の説明】
１…基 体 ５ａ、５ｂ…チェーン
９…バネ掛止部材
２…回旋台 ６…三方分岐部材 １
０…負荷調節ノブ
３…ボルト軸 ７…チェーン １
１…負荷調節ロッド
４…チェーン係止部材 ８…引きバネ １
２…ストッパBRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a bottom view of a rotary load device, FIG. 2 is a bottom view in an operating state, and FIG. 3 is a side view. [Description of Signs] 1 ... Base 5a, 5b ... Chain
9 ... Spring retaining member 2 ... Turning table 6 ... Three-way branching member 1
0 ... Load adjustment knob 3 ... Bolt shaft 7 ... Chain 1
DESCRIPTION OF SYMBOLS 1 ... Load adjustment rod 4 ... Chain locking member 8 ... Extension spring 1
2 ... Stopper