Processing apparatus for surface treatment of concrete and method of surface treatment of concrete

Abstract

A processing apparatus is used for surface treatment of undried concrete. The processing apparatus comprises a single roller having a cylindrical shape and a side face which comes into contact with the undried concrete, a main body portion provided with the single roller at a bottom and mounted a driving unit that includes a motor configured to rotationally drive the single roller, a front trowel attached to the main body portion to position in front of the single roller, a rear trowel attached to the main body portion to position in rear of the single roller, and a handle portion extended rearward and obliquely upward from the main body portion and provided with a grip component which is gripped by an operator at an upper end and is provided with an operation part for receiving an operation from the operator.

What is claimed is: 
     
         1 . A processing apparatus used for surface treatment of undried concrete, the processing apparatus comprising:
 a single roller having a cylindrical shape and a side face which comes into contact with the undried concrete;   a main body portion provided with the single roller at a bottom to be supported on the undried concrete by the single roller, and mounted a driving unit that includes a motor configured to rotationally drive the single roller;   a front trowel attached to the main body portion to position in front of the single roller;   a rear trowel attached to the main body portion to position in rear of the single roller; and   a handle portion extended rearward and obliquely upward from the main body portion and provided with a grip component that is gripped by an operator at an upper end, wherein   the processing apparatus is configured to bring an edge of the front trowel into contact with a surface of the undried concrete by an operation of lifting up the grip component in an upward direction to tilt a front side of the main body portion downward about the single roller as a supporting point, and is configured to bring an edge of the rear trowel into contact with the surface of the undried concrete by an operation of lifting down the grip component in a downward direction to tilt a rear side of the main body portion downward about the single roller as the supporting point,   the driving unit is configured to change over a rotating direction of the single roller between a forward direction and a rearward direction,   the grip component is provided with an operation part that enables the operator to perform a changeover operation of the rotating direction of the single roller, and   the side face of the single roller is configured to be flat and smooth, such as to enable the single roller to smooth and level off the surface of the undried concrete with self-propelling and idling the single roller.   
     
     
         2 . The processing apparatus according to  claim 1 ,
 wherein the driving unit is placed above the single roller in the main body portion.   
     
     
         3 . The processing apparatus according to  claim 2 ,
 wherein a battery configured to supply electric power to the motor is placed on an upper face of the main body portion to be attachable to and detachable from the main body portion.   
     
     
         4 . The processing apparatus according to  claim 1 ,
 wherein the operation part includes a forward switch and a rearward switch configured to be pressed by the operator, and   the driving unit is configured to keep rotating the single roller in the forward direction while the forward switch is kept pressing, to keep rotating the single roller in the rearward direction while the rearward switch is kept pressing, and to stop the motor while neither the forward switch nor the rearward switch is pressed.   
     
     
         5 . The processing apparatus according to  claim 1 ,
 wherein the front trowel and the rear trowel are adjustable in heights and inclination angles with respect to the main body portion.   
     
     
         6 . A method of surface treatment of concrete by using the processing apparatus according to  claim 1 , the method comprising:
 placing the single roller such that the side face of the single roller comes into contact with the undried concrete and tilting the main body portion about the single roller as a supporting point such that an edge of either one of the front trowel and the rear trowel comes into contact with the undried concrete, and   smoothing and levelling off the surface of the undried concrete by pressing with the single roller and by sliding of the edge of the front trowel or the rear trowel, while self-propelling or idling the single roller.