PURPOSE: To finish the surface of high-strength concrete easily and rapidly without deteriorating tha quality thereof by providing such that the whole of a machine is made compact and lightweight.
CONSTITUTION: A first supporting frame 3 is provided on a travelling device and a second supporting frame 5 is provided in the frame 3 through a crank mechanism 4 in such a manner that the frame 5 is rotatable about a vertical axis without changing the position with respect to the travelling device. The central part of a disk type trowel 8 is supported by the lower end of the frame 5 through a spherical bearing 9 and a pressing mechanism 11 for imparting pressing forces to the surface of concrete is mounted to the trowel 8. And ultrasonic wave signals generated by an ultrasonic wave generator 13 provided on the side of the travelling device are sent to a vibration mechanism provided on the trowel 8 to impart ultrasonic wave vibration to the trowel 8, thereby smoothing the surface of the concrete.
KAWAMURA TAKEO
TANIFUJI FUMINOBU
OGUCHI OSAMI
MATSUGISHI NORIAKI
SEIDENSHA ELECTRONICS