EXPANDABLE POLE

PROBLEM TO BE SOLVED: To provide an expandable pole expandable in the vertical direction, endurable against a vertical directional load, and simply expandable.SOLUTION: An expandable pole comprises an outer cylinder 5, intermediate cylinders 3 and 4 for slidably inserting an outside surface into the outer cylinder 5, an inner cylinder 2 for slidably inserting an outside surface into the intermediate cylinders 3 and 4, a first coil spring 7 arranged in the inner cylinder 2 in an outer diameter of an inner diameter or less of the inner cylinder 2, a turning coil spring 9 arranged in the inner cylinder 2 and deviatively arrangeable in the axial direction with the first spring 7, a first hollow cylindrical member 10 and a turning member 8 fixed to respective lower end parts of the first and turning springs 7 and 9, a rotation stop part formed in an upper end part of the inner cylinder 2 and checking relative turning to the inner cylinder 2 of the first spring 7, a connection part 13 provided on the inner periphery of the first hollow cylindrical member 10 and checking relative turning between the first and turning springs 7 and 9 and a driving mechanism 20 for turning the turning member 8, and is constituted so that the inner cylinder 2 rises to the outer cylinder 5 by turning the turning member 8 and the turning spring 9 by the driving mechanism 20.SELECTED DRAWING: Figure 2 【課題】縦方向に伸縮可能で上下方向荷重に耐え、簡単に伸縮できる伸縮ポールを提供する。【解決手段】外筒５と、外側面が外筒５に摺動自在に挿入された中間筒３，４と、外側面が中間筒３，４に摺動自在に挿入された内筒２と、内筒２の内径以下の外径で内筒２内に配置される第１コイルスプリング７と、内筒２内に配置され、第１スプリング７と軸方向にずれて配置可能な旋回用コイルスプリング９と、第１及び旋回用スプリング７，９の各下端部に固定された第１中空円筒部材１０及び旋回部材８と、内筒２上端部に形成され、第１スプリング７の内筒２に対する相対旋回を阻止する回り止め部と、第１中空円筒部材１０内周に設けられ、第１及び旋回用スプリング７，９間の相対旋回を阻止する連結部１３と、旋回部材８を旋回する駆動機構２０とを備え、駆動機構２０で旋回部材８及び旋回用スプリング９が旋回して内筒２が外筒５に対し上昇する構成とした。【選択図】図２