A mobile rake device for displacing mown crop has a frame with a rake tool assembly that has a path-shaped working range and includes two rake tools with rake tines. In an operative position, the rake tools are arranged behind each other in a staggered manner in the direction of travel to provide two path parallel sections to achieve the path-shaped working range. The rake tools displace the mown crop located in the path section to one side in a flow of crop in order to form ultimately one final windrow. The rake tool assembly has an auxiliary displacing tool, that is arranged to throw the crop, which has been collected by the first rake tool in a flow of crop or in the form of a windrow, a pre-windrow, across the front of the next rake tool towards the final windrow to be formed.