PROBLEM TO BE SOLVED: To simplify a structure and to reduce the cost in a hinge-type door opening and closing mechanism attached to a pressure container.SOLUTION: A door 2 for opening and closing an aperture of a pressure container 1 is attached to the pressure container 1 to be turnable through a hinge 3, and the hinge 3 includes a holding body 31 attached to one of the pressure container 1 side and the door 2 side, a hinge shaft 34 attached to the other of the pressure container 1 side and the door 2 side and inserted into a long hole 31a perforated in the holding body 31 to be relatively displaceable to a major axis direction, and an elastic body 35 for elastically holding the hinge shaft 34 in a major axis direction intermediate position of the long hole 31a, and a major axis of the long hole 31a is extended to be almost in parallel to a thickness direction of the door 2.COPYRIGHT: (C)2015,JPO&INPIT【課題】圧力容器に装備されるヒンジ式の扉開閉機構において、構造を簡素にしてコストの低減を図る。【解決手段】圧力容器1の開口部を開閉する扉2が、ヒンジ3を介して圧力容器1に揺動可能に取り付けられ、ヒンジ3は、圧力容器1側と扉2側のうち一方に取り付けられた保持体31と、圧力容器1側と扉2側のうち他方に取り付けられると共に保持体31に開設された長孔31aにその長径方向へ相対変位可能に挿通されたヒンジ軸34と、このヒンジ軸34を長孔31aの長径方向中間位置に弾性的に保持する弾性体35とを備え、長孔31aの長径が扉2の厚さ方向と略平行に延びている。【選択図】図2
