Scheuermaschine mit seitlich verstellbaren Scheuerbürsten

A floor scrubbing machine (10) has scrub brushes (26) and their drive motors mounted in a scrub head (24) located amidships under the machine frame (11). Provision is made to move the scrub head laterally on occasion to a position where it extends beyond one side of the machine frame to facilitate scrubbing along walls, thereby eliminating the need for a scrubbing side brush. The scrub brushes bear evenly against the floor regardless of the lateral position of the scrub head even though a variable down force may be applied to the scrub head. The scrub head is resiliently attached to the means for moving it laterally so that if it encounters a solid obstacle while it is extended it will be yieldably pushed back under the machine frame with a minimum likelihood of damage, and then will automatically extend out again after the obstacle is past.