Rear spoiler system for a vehicle

1. A rear spoiler device ( 10 ) for a vehicle ( 1 ) with at least one rear door ( 8 , 9 ),

the rear spoiler device ( 10 ) comprising at least one side spoiler ( 16 , 17 ) with at least one side air guide element ( 32 ) which can be moved between a driving position for contour extension and aerodynamic air guidance when the rear door ( 8 , 9 ) is closed, and a base position when the rear door ( 8 , 9 ) is open,

wherein each of the at least one side spoiler ( 16 , 17 ) has a swing arm ( 30 ) with a plurality of first pivot joints ( 31 ) at various heights of the swing arm for pivotable fixing on the rear door ( 8 , 9 ),

wherein the side air guide element ( 32 ) is mounted adjustably via the swing arm ( 30 ) on the rear door ( 8 , 9 ), and

wherein the side air guide element ( 32 ) has a locking arrangement ( 36 ) on its front end region ( 32 a ) for releasable and lockable fixing to the truck ( 1 ).

2. The rear spoiler device as claimed in claim 1 ,

wherein the side air guide element ( 32 ) is mounted pivotably on the swing arm ( 30 ) via at least one second pivot joint ( 34 ),

wherein the at least one second pivot joint ( 34 ) is arranged on or between a rear end of the side air guide element ( 32 ) and a rear end of the swing arm ( 30 ).

3. The rear spoiler device as claimed in claim 2 , wherein it has multiple vertically spaced second pivot joints ( 34 ) or multiple vertically spaced locking arrangements ( 36 ) which can be released and locked manually or both.

4. The rear spoiler device ( 10 ) as claimed in claim 2 , wherein in the driving position, the swing arm ( 30 ), the side air guide element ( 32 ) and the vehicle ( 1 ) can form a triangle, the corners of which are formed by the at least one first pivot joint ( 31 ), the at least one second pivot joint ( 34 ) and the at least one locking arrangement ( 36 ).

5. The rear spoiler device ( 10 ) as claimed in claim 1 , wherein multiple vertically spaced first pivot joints ( 31 ) are provided for fixing in holes ( 33 ) of the rear doors ( 8 , 9 ).

6. The rear spoiler device ( 10 ) as claimed in claim 1 , wherein the locking arrangement ( 36 ) can be locked to a vehicle structure ( 2 ) or a side wall ( 4 , 5 ) of the vehicle ( 1 ).

7. A rear spoiler device ( 10 ) for a vehicle ( 1 ) with at least one rear door ( 8 , 9 ),

the rear spoiler device ( 10 ) comprising at least one side spoiler ( 16 , 17 ) with at least one side air guide element ( 32 ) which can be moved between a driving position for contour extension and aerodynamic air guidance when the rear door ( 8 , 9 ) is closed, and a base position when the rear door ( 8 , 9 ) is open,

wherein the side spoiler ( 16 , 17 ) has a swing arm ( 30 ) with a first pivot joint ( 31 ) for a pivotable fixing on the rear door ( 8 , 9 ),

wherein the side air guide element ( 32 ) is mounted adjustably via the swing arm ( 30 ) on the rear door ( 8 , 9 ), and

wherein the side air guide element ( 32 ) has a locking arrangement ( 36 ) on its front end region ( 32 a ) for a releasable and lockable fixing to the truck ( 1 ), wherein the locking arrangement ( 36 ) can be locked to a vehicle structure ( 2 ) or a side wall ( 4 , 5 ) of the vehicle ( 1 ) and is unlocked automatically when the rear doors ( 8 , 9 ) swing open.

8. The rear spoiler device ( 10 ) as claimed in claim 1 , wherein the locking arrangement ( 36 ) is configured to be locked to the rear door ( 8 , 9 ) of the vehicle ( 1 ).

9. The rear spoiler device ( 10 ) as claimed in claim 8 , wherein the locking arrangement ( 36 ) has a locking part ( 40 ) extending laterally toward the center of the vehicle ( 1 ), for releasable locking to a door-side retaining receiver ( 42 ).

10. The rear spoiler device ( 10 ) as claimed in claim 1 , further comprising at least one roof spoiler ( 13 , 14 ) with a roof air guide element ( 24 ),

wherein the roof spoiler ( 13 , 14 ) is configured for fixation to a rear door ( 8 , 9 ) without fixation to the vehicle structure ( 2 ),

wherein the roof air guide element ( 24 ) is automatically erected into its driving position on closure of the rear doors ( 8 , 9 ) and automatically moved into a rest position on opening of the rear doors ( 8 , 9 ).

11. The rear spoiler device ( 10 ) as claimed in claim 10 , wherein

the roof spoiler ( 13 , 14 ) has a fixing device ( 20 ) for fixing to the rear door ( 8 , 9 ), and a roof air guide element ( 24 ) is mounted pivotably on the locking arrangement ( 20 ),

wherein the roof air guide element ( 24 ) has a support arrangement ( 26 ) for support on the vehicle structure ( 2 ) of the vehicle when the rear doors are closed and for moving the roof air guide element ( 24 ) into its driving position when the rear doors ( 8 ) are closed, and

wherein when the rear doors are opened, the roof air guide element ( 24 ) can be pivoted under its own weight down into its base position with the support arrangement ( 26 ) protruding to the rear.

12. The rear spoiler device ( 10 ) as claimed in claim 11 , wherein the support arrangement is a cam ( 26 ) which is formed integrally with or is connected to the roof air guide element ( 24 ) and has a cam face ( 26 a ) for support on the vehicle structure ( 2 ) and for rolling on the vehicle structure ( 2 ) during pivoting of the cam ( 26 ) when the rear door ( 8 ) is closed.

13. The rear spoiler device ( 10 ) as claimed in claim 11 , wherein the fixing device ( 20 ) is configured for fixing to an upper edge ( 8 a ) of the rear door ( 8 ).

14. The rear spoiler device ( 10 ) as claimed in claim 11 , wherein the fixing device ( 20 ) has a rotary axis ( 23 ) in which the roof air guide element ( 24 ) is pivotably mounted, and an insert arrangement ( 21 ) for insertion in the upper edge ( 8 a ) of the rear door ( 8 ).

15. The rear spoiler device ( 10 ) as claimed in claim 1 , comprising two side spoilers ( 16 , 17 ) and two roof spoilers ( 13 , 14 ) for fixing to two rear doors ( 8 , 9 ), wherein in the base position when the rear doors ( 8 , 9 ) are open, each of the two side spoilers supporting a respective one of the two roof spoiler.

16. A vehicle with rear doors comprising:

a rear spoiler device ( 10 ) as claimed in claim 15 arranged on a rear region of the vehicle,

wherein the rear doors ( 8 , 9 ) of the vehicle ( 1 ) can be folded out after unlocking from their closed position and configured to be laid against or locked to a side wall ( 4 , 5 ) of the vehicle ( 1 ),

wherein each side air guide element ( 32 ), after unlocking of the locking arrangement ( 36 ), is pivotable about the second pivot joint ( 34 ) and the swing arm ( 30 ) is pivotable about the first pivot joint ( 31 ).

17. The rear spoiler device as claimed in claim 3 , wherein the multiple vertically spaced locking arrangements ( 36 ) are catch hooks ( 36 ), for locking in retaining receivers ( 37 , 42 ) of the vehicle ( 1 ).

18. The rear spoiler device ( 10 ) as claimed in claim 9 , wherein the locking part ( 40 ) is a locking tab ( 40 ) and the door-side retaining receiver ( 42 ) is a locking pin ( 42 ).

19. The rear spoiler device ( 10 ) as claimed in claim 14 , wherein the insert arrangement ( 21 ) includes vertically downwardly extending insert rods ( 21 ).