DOOR STRUCTURE

To provide a door structure capable of suppressing progression of aged deterioration of a door, even if a door body is kept being held at an upper position.SOLUTION: An up-and-down door 10 comprises a door body 20 ascendibly and descendibly provided near an opening Wa of a wall body W. Ascent and descent of the door body 20 between a first position on an upper side and a second position on a lower side open and close the opening Wa. A hook member 41 which is displaceable relative to the wall body W is formed on the wall body W. A pin member 21b which is non-displaceable relative to the door body 20 is formed on the door body 20. When the door body 20 is located at the first position, the hook member 41 is located at an engaging position where it can engage with the pin member 21b. When the door body 20 goes up to an ascent position which is higher than the first position, the hook member 41 is displaced to a non-engaging position where it does not engage with the pin member 21b. The door body 20 is supported by the wall body W in an engaging state where the hook member 41 and pin member 21b engage with each other.SELECTED DRAWING: Figure 1 【課題】扉本体を上側の位置で静止し続けた場合でも、扉の経年劣化の進行を抑制することが可能となる、扉構造を提供する。【解決手段】昇降扉１０は、壁体Ｗにおける開口部Ｗａの近傍で昇降可能に設けられる扉本体２０を備え、扉本体２０が上側の第一位置と下側の第二位置との間を昇降することにより開口部Ｗａを開閉し、壁体Ｗには壁体Ｗに対して相対変位可能なフック部材４１が形成され、扉本体２０には扉本体２０に対して相対変位不能なピン部材２１ｂが形成され、フック部材４１は、扉本体２０が第一位置に位置する際はピン部材２１ｂと係合可能な係合位置に位置するとともに、扉本体２０が第一位置よりも高い位置である上昇位置まで上昇した際にはピン部材２１ｂと係合しない非係合位置に変位し、フック部材４１とピン部材２１ｂとが係合する係合状態において扉本体２０が壁体Ｗにより支持される。【選択図】図１