METHOD AND DEVICE FOR FINISHING FLOOR SURFACE MADE OF FLUID TO BE HARDENED WITH LAPSE OF TIME

PURPOSE: To automate the finishing work of a concrete floor surface by towing an ultrasonic trowel, which has an ultrasonic oscillator on the top surface of a trowel seat, with a running driving vehicle in the condition that the lower surface of the seat is directed to the floor surface and a part thereof abuts on the floor surface. CONSTITUTION: Oscillation of an ultrasonic oscillator is transmitted to a trowel seat, and the lower surface of the trowel seat or the edge thereof abuts on the floor surface of the fluid so as to transmit the ultrasonic oscillation to the fluid. Furthermore, the ultrasonic oscillation is synthesized with a loading pressure so as to evenly finish the floor surface. In this case, the vertical movement with the running of a running driving vehicle 11 is absorbed by a pantagraph mechanism 82, and ultrasonic trowels 71, 72 are lifted by the operation of a trowel elevating mechanism 85. In this condition, the running driving vehicle 11 is moved for running. Angle of the ultrasonic trowels 71, 72 against the floor surface is adjusted by a trowel angle adjusting mechanism 84. The ultrasonic trowels 71, 72 are fitted to the front and the rear of the running driving vehicle 11, and finishing of the floor surface is conducted by going forward or backward of the running driving vehicle.