PROBLEM TO BE SOLVED: To more smoothly perform telescopic operation of a control lever by sliding movement of an inner cylinder.SOLUTION: The control lever includes the inner cylinder P2 with a plurality of engagement holes 80 formed at regular intervals along the longitudinal direction on the outer surface, and an outer cylinder P1 for storing the inner cylinder P2 in such a way as to freely insert or draw out the inner cylinder. A rotator 54 with a plurality of engagement pieces on the outer periphery to be engaged with the engagement holes 80 of the inner cylinder is rotatably supported to the outer cylinder P1 side. When the rotator 54 is rotated forward, the inner cylinder P2 is fed to the outer side of the outer cylinder P1 to extend the control lever. When the rotator 54 is rotated backward, the inner cylinder P2 is taken into the inner side of the outer cylinder P1 to shorten the control lever.COPYRIGHT: (C)2012,JPO&INPIT【課題】内筒のスライド移動による操縦ハンドルの伸縮操作をより滑らかに実施することができるようにすること。【解決手段】操縦ハンドルが、複数の係合穴80を長手方向に沿って一定間隔で外面に形成してある内筒P2と、内筒P2を挿入及び引き出し自在に収容する外筒P1とを備え、内筒の係合穴80に係合する複数の係合片を外周部に備えた回転体54を外筒P1側に回転可能に支持し、回転体54を正回転させると内筒P2を外筒P1の外側に送りだして操縦ハンドルを伸長させ、回転体54を逆回転させると内筒P2を外筒P1の内側に取り込んで操縦ハンドルを短縮させる。【選択図】図14
