Self-propelled concrete vibrator apparatus

摘要

A self-propelled concrete vibrator machine adapted for movement along a pair of spaced-apart guide rails which are positioned on the bridge centering upon which the concrete is to be poured. The concrete vibrator machine is adapted to be moved along the guide rails closely adjacent the forward end of a concrete finishing machine. The vibrator machine comprises first and second drive units mounted on the guide rails for selective movement on the guide rails in either forward or reverse directions. A truss assembly is secured to the rearward ends of the drive units and extends therebetween over the area upon which the concrete is being poured. A plurality of vertically disposed and horizontally spaced hydraulic vibrators are mounted on the rearward end of the truss assembly. The hydraulic vibrators are vertically movably mounted relative to the truss assembly so that the hydraulic vibrators may be moved from an upper position above the concrete to a lowered position wherein the hydraulic vibrators are positioned in the concrete. Apparatus is provided for controlling the vibrational speed of the hydraulic vibrators as well as the length of time the vibrators are in the concrete. The hydraulic vibrators may be also moved horizontally when in their upper position so that a reduced number of hydraulic vibrators may be employed. The vibrator machine is moved along the guide rails closely adjacent the forward end of the finishing machine so that the concrete may be vibrated at predetermined spacings for predetermined lengths of time immediately prior to the concrete being finished by the finishing machine.