REINFORCEMENT STRUCTURE OF SLIDE DOOR FOR VEHICLE

PROBLEM TO BE SOLVED: To restrict the movement of a rear slide door outward by forming a highly rigid portion with an L-shaped door inner panel and a reinforcement member, increasing the rigidity of a hook at a wide portion thereof, suppressing the local deformation of the hook and the door inner panel, and maintaining the engagement of the hook with a striker.SOLUTION: A front portion of a door inner panel 21 around an insertion hole 26 is formed in an L-shaped surface with an inner panel surface 21a and an intermediate panel surface 21c. A reinforcement member 6 is formed in an L-shape having an inner wall portion 6a and an intermediate wall portion 6c joined to panel surfaces 21a, 21c of the door inner panel 21. The hook 27 is formed in an L-shape corresponding to wall portions 6a, 6c of the reinforcement member 6. The rear side of a surface 27a of the hook 27 in the longitudinal direction of a vehicle extends to the rear of the vehicle together with an inner wall portion 6a of the reinforcement member 6. The outer side of a surface 27b thereof in the lateral direction of the vehicle is disposed at a position where the hook is engageable with a striker 41. A wide portion 30 is provided to the hook 27 with an L-shaped bent portion 29 interposed therebetween. The wide portion 30 matches the door inner panel 21 and the L-shaped bent portion of the reinforcement member 6.