Spare seat for vehicle

A spare seat for a vehicle, arranged in a space adjacent a side of a seat cushion of a main seat, said spare seat comprising:

• a seat cushion rendered horizontal relative to said seat cushion of said main seat in a position of use of said spare seat;
• a seat back foldably supported to said seat cushion of said spare seat;
• said seat back rendered vertical with respect to said seat cushion of said spare seat in said position of use of said spare seat and folded horizontally and overlapped on said seat cushion of said spare seat after use of said spare seat;
• support means pivotally supporting said seat cushion of said spare seat;
• said support means adapted to be mounted on a floor of a vehicle in the vicinity of said side of said seat cushion of said main seat;
• said seat cushion of said spare seat rendered vertical together with said seat back overlapped on said seat cushion of said spare seat after use of said spare seat, whereby said seat cushion and said seat back of said spare seat are vertically accommodated in said space adjacent the side of said seat cushion of said main seat after use of said spare seat;
• said seat cushion of said spare seat pivotally supported by said support means at points thereof which are spaced laterally from the side of said seat cushion of said main seat at an interval which is at least as long as a total width of said seat cushion and seat back of said spare seat in a vertical overlapped state;
• locking means for releasably locking said seat cushion of said spare seat to keep said seat cushion of said spare seat horizontal or vertical;
• said locking means mounted on said support means and comprising movable means having a substantially U-shaped body in outline, said movable means pivotally connected at end portions of first and second legs of said U-shaped body thereof to a section of said seat cushion of said spare seat which is adjacent said side of said seat cushion of said main seat in said position of use, guide means mounted on said support means for guiding a horizontal member spanning said first and second legs of said U-shaped body of said movable means in the directions toward and away from said main seat in response to pivotal movement of said seat cushion of said spare seat, said guide means including guide slit means, said horizontal portion of said U-shaped body of said movable means movably received in said guide slit means of said guide means, and catching means mounted on said support means for catching said horizontal portion of said movable means to lock said seat cushion of said spare seat;
• and
• releasing means mounted on said support means for causing said seat cushion of said spare seat to be released from said locking means.