PROBLEM TO BE SOLVED: To provide an opening/closing device improved in conforming the movement speed of a driving machine to that of a winding shaft even when the inclination of a guide pillar is small.SOLUTION: An opening/closing device includes: an opening/closing sheet 1 the one-side end part 1a of which is fixed to a hothouse H； a winding shaft 2 fixed to another-side end part of the opening/closing sheet 1 to wind or rewind the opening/closing sheet 1； a guide pillar 3 disposed on the lateral side of the opening/closing sheet 1 along the moving direction of the winding shaft 2； a driving machine 4 rotationally driving the winding shaft 2； and a moving member 5 moving the driving machine 4 along the guide pillar 3. The driving machine 4 includes: a driving shaft 40 connected to the end part of the winding shaft 2； and a driving machine body 41 rotating the winding shaft 2 via the driving shaft 40. The moving member 5 includes: a slip roller 50 having a rotational center on the rotational center line of the driving shaft 40, relatively rotatable to the driving shaft 40 and abutting on the outer peripheral surface of the guide pillar 3； and at least one driven roller 51 abutting on the outer peripheral surface of the guide pillar 3 at the side of an antislip roller.【課題】 開閉装置の改良に関し、ガイド柱の傾きが小さい場合にも、駆動機と巻き上げ軸の移動速度を合わせる。【解決手段】 一方側端部１ａが温室Ｈに固定される開閉シート１と、開閉シート１の他方側端部に固定されて開閉シート１を巻き取り、巻き戻す巻き上げ軸２と、開閉シート１の横側に巻き上げ軸２の移動方向に沿って配置されるガイド柱３と、巻き上げ軸２を回転駆動する駆動機４と、駆動機４をガイド柱３に沿って移動させる移動部材５とを備え、駆動機４は、巻き上げ軸２の端部に連なる駆動軸４０と、駆動軸４０を介して巻き上げ軸２を回転させる駆動機本体４１とを備えている開閉装置において、移動部材５は、駆動軸４０の回転中心線上に回転中心を有し駆動軸４０と相対回転可能であるとともにガイド柱３の外周面に当接するスリップローラ５０と、ガイド柱３の反スリップローラ側の外周面に当接する一または複数の従動ローラ５１とを備える。【選択図】 図２
