PROBLEM TO BE SOLVED: To increase a distance that an actuation member moves, even in a case of downsizing a pressure type actuator configured to move the actuation member with pressure of fluid such as air, thereby obtaining large force.SOLUTION: A pressure type actuator comprises: a cylindrical body 11 having airtightness a long actuator member 14 attached to one end of the cylindrical body 11, and extending in a direction opposite to a folded side in a state where one end side of the cylindrical body 11 is folded to the inside of the cylindrical body 11 a blockage member 12 having an insertion part for the actuation member 14, and attached in a state where an end part on the other end side of the cylindrical body 11 is opened and a fluid supply/discharge means 15 communicating with the inside of the cylindrical body 11.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】 空気等の流体の圧力を利用して作動用部材を移動させる圧力式アクチュエーターを小型化させた場合にも、作動用部材を移動させる距離を大きくして、大きな力を得られるようにする。【解決手段】 気密性を有する筒状体11と、筒状体11の一端に取り付けられて、筒状体11の一端側を筒状体11の内側に折り返した状態で折り返し側の反対方向に延びる長尺状の作動用部材14と、作動用部材14の挿通部を有し、筒状体11の他端側の端部を開口させた状態で取り付けられた閉塞用部材12と、筒状体11の内部に連通する流体給排気手段15とからなる、圧力式アクチュエーター。【選択図】 図1
