Seat device for vehicle

1. A seat device for a vehicle, which is disposed on a floor panel in a cabin equipped with an ingress and egress opening at a side, comprising;

a front seat, the front seat comprising a seat cushion and a seat back;

a rear seat, the rear seat being disposed behind said front seat and comprising a first seat and a second seat that are disposed side by side in a vehicle width direction,

the first seat comprising a seat cushion and a seat back, the seat back of the first seat being configured so as to be folded on the seat cushion of the first seat, and pivotally attached to the floor panel by;

a first-seat holding mechanism operative to hold said first seat with said seat cushion and said seat back folded on said seat cushion in a double-fold state where said seat cushion and seat back folded on the seat cushion are rotated forward together and positioned in an upright position substantially forwardly of the floor panel attachment of the first seat;

the second seat comprising a seat cushion and a seat back;

a second-seat moving mechanism to move said second seat laterally into a space at an original existing location of said first seat that is created behind said first seat taking said double-fold state, the second seat laterally moved by the second-seat moving mechanism forming a storage space between the second seat and a side wall of the cabin,

wherein said second seat moved laterally by said second-seat moving mechanism can take a use position where a passenger can be seated thereon behind said first seat taking the double-fold state.

2. The seat device for a vehicle of claim 1 , wherein said first seat is configured so as to have a smaller width than said second seat.

3. The seat device for a vehicle of claim 2 , wherein said seat back of the second seat is configured so as to be folded on said seat cushion of the second seat, and there is provided a second-seat holding mechanism to hold said second seat with said seat cushion and said seat back folded on said seat cushion in a double-fold state where both said seat cushion and seat back of the second seat are rotated forward together and positioned in an upright position.

4. The seat device for a vehicle of claim 1 , wherein there is provided a slide mechanism to move said second seat backward to a position between wheel houses which project inwardly respectively in the cabin.

5. The seat device for a vehicle of claim 1 , wherein said second-seat moving mechanism is configured to move said second seat laterally in such a manner that only a portion of the second seat is located in said space at the original existing location of said first seat.

6. The seat device for a vehicle of claim 2 , wherein said front seat comprises a driver's seat and a passenger's seat, and a child seat is attachable to said second seat of to rear seat such that when the second seat is laterally moved by said second-seat moving mechanism, the attached child seat to the second seat is located in back of a center portion between the driver's seat and the passenger's seat.

7. The seat device for a vehicle of claim 3 , wherein said second-seat moving mechanism is rotated forward along with said second seat of the rear seat when the second seat is held in the double-fold state by said second-seat holding mechanism.

8. The seat device for a vehicle of claim 1 , wherein said first-seat holding mechanism comprises a two-hinged link.