Driver assist device and industrial truck with driver assist device
A driver assist device is described for an industrial truck ( 1 ) with at least one steered wheel ( 21 ) at the rear end of the truck. The driver assist device is located on the industrial truck ( 1 ) and projects a lighting effect on the roadway ( 13 ). The lighting effect marks a peripheral path ( 12 ) of the external periphery ( 14 ) of the rear end ( 15 ) of the truck on the roadway ( 13 ) for a selected steering angle as the industrial truck travels in a curve.
1. A driver assist device for an industrial truck having at least one steered wheel at a rear end of the truck, which driver assist device comprises:
a light source configured to be mounted on an industrial truck and to project a lighting effect on a roadway, wherein the lighting effect marks a peripheral path of an external peripheral surface of a rear end of the industrial truck as the industrial truck travels on a curve,
wherein the peripheral path is marked beginning from a rear end of the truck to a maximum lateral deviation with reference to a longitudinal axis of the truck.
2. The driver assist device as recited in claim 1 , wherein the lighting effect comprises a solid or broken line which corresponds to the peripheral path.
3. The driver assist device as recited in claim 1 , wherein the lighting effect is produced by a laser.
4. An industrial truck comprising:
at least one steered wheel at the rear end of the truck; and
a driver assist device comprising at least one light source mounted on the industrial truck,
wherein the driver assist device projects a lighting effect on a roadway, and wherein the lighting effect marks a peripheral path of an outside peripheral surface of the rear end of the industrial truck on the roadway for a selected steering angle as the industrial truck travels on a curve, and
wherein the peripheral path is marked beginning from the rear end of the truck to a maximum lateral deviation with reference to a longitudinal axis of the truck.
5. The industrial truck as recited in claim 4 , wherein the peripheral path is for a maximum steering angle of the industrial truck.
6. The industrial truck as recited in claim 4 , wherein the peripheral path is for an instantaneous steering angle of the industrial truck.
7. The industrial truck as recited in claim 4 , wherein the driver assist device is turned on by a steering angle that exceeds a predetermined minimum steering angle.
8. The industrial truck as recited in claim 4 , wherein the driver assist device is turned on by a switch.
9. The industrial truck as recited in claim 4 , wherein the driver assist device is turned on when a speed of the truck drops below a predetermined speed limit.
10. The industrial truck as recited in claim 4 , wherein the driver assist device projects a lighting effect on the roadway on one side or both sides of the industrial truck.
11. The industrial truck as recited in claim 4 , wherein the industrial truck has a protective roof over a driver station and the light source for the lighting effect is located in an upper area of the protective roof.
12. The industrial truck as recited in claim 4 , wherein the industrial truck has a lifting mast and the light source for the lighting effect is located on an upper area of the lifting mast.
13. The industrial truck as recited in claim 4 , wherein the industrial truck has a counterbalance and the light source for the lighting effect is located on an upper area of the counterbalance.
14. The industrial truck as recited in claim 4 , wherein the steering angle is selected from the group consisting of a maximum steering angle of the industrial truck and an instantaneous steering angle of the industrial truck.