VEHICLE DOOR DEVICE

To support a door in a stable manner.SOLUTION: A vehicle door device 20 includes: a door-side engaging portion 41 provided at a closed-side end 45 of a door 5; a vehicle body-side engaging portion 42 provided at a closed-side end 46 of a door opening 3; and a telescopic mechanism 60 provided at a second link arm 12. The vehicle body-side engaging portion 42 includes a shaft-shaped engaging portion 51 extending in a vertical direction of the vehicle. The door-side engaging portion 41 includes a guide groove 57 having a pair of side wall portions facing in a vehicle width direction and extending in an opening/closing operation direction of the door 5. Further, at an opening/closing operation position near a fully closed position of the door 5 in which the door-side engaging portion 41 and the vehicle body-side engaging portion 42 engage, the shaft-shaped engaging portion 51 is arranged in the guide groove 57. Further, the door 5 is configured to open and close due to the relative displacement of the shaft-shaped engaging portion 51 along the extending direction of the guide groove 57 while changing a length of the second link arm 12 based on the operation of the telescopic mechanism 60.SELECTED DRAWING: Figure 10 【課題】安定的にドアを支持すること。【解決手段】車両用ドア装置２０は、ドア５の閉側端部４５に設けられたドア側係合部４１と、ドア開口部３の閉側端部４６に設けられた車体側係合部４２と、第２のリンクアーム１２に設けられた伸縮機構６０と、を備える。車体側係合部４２は、車両の上下方向に延びる軸状係合部５１を備え、ドア側係合部４１は、ドア側係合部４１は、車幅方向に対向する一対の側壁部を有してドア５の開閉動作方向に延在するガイド溝５７を備えてなる。更に、ドア側係合部４１と車体側係合部４２とが係合するドア５の全閉位置近傍の開閉動作位置においては、そのガイド溝５７内に軸状係合部５１が配置される。そして、伸縮機構６０の動作に基づいた第２のリンクアーム１２の長さ変更を伴いながら、そのガイド溝５７の延在方向に沿って軸状係合部５１が相対変位することによりドア５が開閉動作するように構成される。【選択図】図１０