Partitioning device for a motor vehicle

An abutment cam (14) and a spiral spring (17) apply a pressure in the roll-in direction on a winding shaft (3). A switch (13) reduces the roll-up force of the abutment cam and spiral spring in the pull-out position of a flexible separation net (1) depending on the switching OFF of a silicon brake (18), such that the switch switches ON the silicon brake after a predetermined time period. The flexible separation net is held on the winding shaft located in a box housing (2), such that the net can be moved between a rolled-in rest position and a pulled-out protection position. The separation net rigidly connects to a vehicle through a holding device such that the net can be rolled in or rolled out.