PURPOSE: To improve working conditions by mounting a tool at the tip of a rod, which is installed movably in the direction fore and aft and also vertically at a vibrating member to swing with respect to the base member, and thereby separating the operator from the place of work.

CONSTITUTION: A base member 2 is located in front of a workpiece by a caster 117 and fixed by a stopper 13. A vibrating member 8 is installed swingingly with respect to the base member 2 and equipped with a controlling member 9 with possibility of moving vertically. This controlling member 9 is provided with a rod 13, and its foremost part is possible to move in the direction fore and aft through the sliding action of an outer and an inner rod. A tool C is tiltably mounted at the foremost part 14a of the inner rod so that an operator can control the position and attitude of the tool and carry through operations while sitting at the chair 161.