VEHICLE SLIDE DOOR SUPPORT DEVICE

1 . A vehicle slide door support device that connects a slide door to a vehicle body, the slide door being configured to open and close a door opening formed in a side surface of the vehicle body, the device comprising:

a first guide rail arranged on a lower portion of the slide door and regulating a movement direction of the slide door;

a first hinge unit arranged below the door opening and configured to move relative to the first guide rail in a longitudinal direction of the first guide rail;

a second guide rail arranged above the first hinge unit on the vehicle body and regulating the movement direction of the slide door; and

a second hinge unit arranged above the first guide rail on the slide door and configured to move relative to the second guide rail in a longitudinal direction of the second guide rail.

2 . The vehicle slide door support device according to claim 1 , wherein

the slide door has a first section for movement in a vehicle longitudinal direction and a second section for movement in a vehicle width direction as well as movement for the vehicle longitudinal direction in a section from a fully open position where the door opening is fully opened to a fully closed position where the door opening is fully closed, and

the slide door includes a first support roller arranged on the lower portion of the slide door and configured to roll on a floor of the vehicle body when the slide door moves in the second section.

3 . The vehicle slide door support device according to claim 2 , wherein

the first hinge unit is arranged at a position closer to a rear end than a front end of the door opening, and

the first support roller is arranged at a position closer to a front end than a rear end of the slide door.

4 . The vehicle slide door support device according to claim 2 , wherein

the first support roller is biased downward.

5 . The vehicle slide door support device according to claim 2 , wherein

the first hinge unit includes a second support roller configured to support the first guide rail from below.

6 . The vehicle slide door support device according to claim 5 , wherein

the second support roller supports the first guide rail when the slide door moves in the second section.

7 . The vehicle slide door support device according to claim 1 , further comprising:

a first engagement part arranged on the vehicle body; and

a second engagement part arranged on the slide door, wherein

the second engagement part is engaged with the first engagement part when the slide door becomes closer to the fully closed position where the door opening is fully closed than the fully open position where the door opening is fully opened.

8 . The vehicle slide door support device according to claim 7 , wherein

the second guide rail and the first engagement part are arranged above the door opening, and

the second hinge unit and the second engagement part are arranged at a distance in the vehicle longitudinal direction on an upper portion of the slide door.

9 . The vehicle slide door support device according to claim 8 , wherein

the first engagement part is formed with an accommodation groove extending along a movement path of the slide door when the slide door is closed, and

the second engagement part has an engagement body configured to enter the accommodation groove and be engaged with the accommodation groove when the slide door is closed.

10 . The vehicle slide door support device according to claim 9 , wherein

the engagement body is an engagement roller configured to rotate around an axis extending in a direction orthogonal to a direction in which the engagement roller enters the accommodation groove.