A side door comprises a door panel portion and a reinforcement portion (a rear-side reinforcement portion and others). The reinforcement portion is provided at at least one of a corner portion positioned between a lower portion and a front-side portion of a peripheral part of the door panel portion and another corner portion positioned between the lower portion and a rear-side portion of the peripheral part of the door panel portion such that the reinforcement portion overlaps with a vehicle-body frame member in a vehicle side view. The reinforcement portion is provided with a curved portion at an inside part of the corner portion where the reinforcement portion is provided. The curved portion is configured to be curved convexly toward an outside part of the corner portion in the vehicle side view.

A vehicle-body structure of a vehicle comprises a vehicle-body frame member forming an opening portion for entrance at a vehicle side part and a front side door provided so as to open and close the opening portion, wherein the front side door comprises a door panel portion and reinforcement portions provided at a peripheral part of the door panel portion such that the reinforcement portions overlap with the vehicle-body frame member in a vehicle side view, the reinforcement portions being made of a plate member.

A side door comprises a door panel portion and a reinforcement portion (a lower-side reinforcement portion and others). The door panel portion is provided to cover an opening portion for entrance and configured such that its peripheral part overlaps with an opening-portion-forming vehicle-body frame member (a side sill and others) in a vehicle side view. The reinforcement portion is provided at the peripheral part of the door panel portion such that it overlaps with the opening-portion-forming vehicle-body frame member in the vehicle side view, thereby reinforcing the peripheral part of the door panel portion against a collision load applied to the side door from a vehicle side. The reinforcement portion is provided at a portion of the peripheral part of the door panel portion which includes a part corresponding to the vehicle-width-direction-extending vehicle-body frame member (a first floor cross member and others).

A method for manufacturing a vehicular side door capable of suppressing occurrence of a residual deformation in a frame of a sash part and a panel member of a door body part in a manufacturing step including a heating step. The method for manufacturing a vehicular side door includes joining each of one end part of a front frame in the vehicle longitudinal direction and one end part of a rear frame to at least one door panel member, heating at least one door panel member, the front frame, and the rear frame joined in the first joining step, and joining the other end part of the front frame and the other end part of the rear frame to each other after the heating step.

A vehicular door includes a resin outer panel and a resin inner panel mounted on a vehicular interior side of the resin outer panel, and the resin inner panel includes a resin body member that configures an interior design surface of the vehicular door and a resin reinforcing member that is arranged on a vehicular exterior side and on a peripheral portion of the resin body member.

A vehicular door includes an inner panel and an outer panel that is mounted on a vehicular exterior side of the inner panel such that they are mounted to and separated from each other by sliding. The outer panel is mounted to the inner panel while the first outer side stopper and the first inner side stopper being fit to each other and the second outer side stopper and the second inner side stopper being fit to each other. In the relative sliding of the inner panel and the outer panel in the lateral direction, the first outer side stopper, the second inner side stopper, the second outer side stopper, and the first inner side stopper are arranged such that the first outer side stopper is not contacted with the second inner side stopper or the second outer side stopper is not contacted with the first inner side stopper.

A door service hole cover includes a cover component that is configured to cover a service hole, and a shock absorption component that is integral to the cover component. The shock absorption component includes a cabin inner component, at least a portion of which projects from the cover component toward the inside of the cabin and which is hollow and open toward the outside of the cabin; and a fragile portion formed on a side surface of the cabin inner component and configured to allow the cabin inner component to crush and deform upon application of a force acting in the direction of projection of the cabin inner component. Upon application of a force acting in the direction of projection, the cabin inner component crushes inwardly and deforms while being twisted.

A mounting structure has a front pillar and a side member outer panel. The front pillar has a first linear expansion coefficient. The side member outer panel has a second linear expansion coefficient that is greater than the first linear expansion coefficient. The side member outer panel has a first fastened portion, a second fastened portion, a third fastened portion and a fourth fastened portion that form an imaginary region, and a hinge mounting portion that constrains deformation, due to heating, within the imaginary region, and an unfastened portion. The unfastened portion permits deformation, in an in-plane direction, of a region between the first fastened portion and the second fastened portion.

A vehicle sliding door, including: an outer panel; an inner panel; a module panel to which devices are fixed; a first reinforcement member for reinforcing a sliding-direction end portion of the inner panel; and a fixation part to which the inner panel, the module panel and the first reinforcement member are fixed is provided.

A vehicle door includes an outer panel, an inner panel including an inner wall portion, a side wall portion, and a flange portion, an impact beam provided so to extend between the outer panel and the inner wall portion on a surface parallel to inner wall portion, and a bracket including a fixed portion, a joint portion, and a recessed portion. The recessed portion recesses toward an inner-panel side such that a tip end of the impact beam is distanced from the bracket. In an extending direction of the impact beam, a yield strength of a region from the fixed portion to a tip end position of the impact beam for a load applied from the outer panel-side is lower than a yield strength of a region from the tip end position of the impact beam to the joint portion for the load applied from the outer-panel side.