driving source is a servo motor m2 disposed within the frame body 9 at the upper end of the extremity portion 11a of the arm frame 11 a box shaped frame body 13 having a hollow pivoting shaft 12 parallel to the pivoting axe thereof is supported which acts as a fourth moving body articulating portion for a rotational movement the pivoting movement of the frame body 13 is controlled by a transmitting mechanism whose driving source is a servo motor m3 disposed within the extremity portion of the arm frame 11 11b is a folding joint an arm frame 15 having a hollow pivoting shaft 14 perpendicular to the pivoting shaft 12 described above is supported by the box shaped frame body 13 which arm frame 15 acts as a fifth moving body articulating portion for a rotational movement the pivoting movement of the arm frame 15 is controlled by a transmitting mechanism whose driving source is a servo motor m4 disposed within the frame body 13 a piping member 17 having a pivoting shaft 16 perpendicular to the hollow pivoting shaft 14 of the arm frame 15 is supported by the extremity portion 15a thereof which piping member 17 acts as a sixth moving body articulating portion for a rotational movement the pivoting movement of the piping member 17 is controlled by a transmitting mechanism whose driving source is an induction motor m5 disposed in the extremity portion 15a in the example indicated in the figures this transmitting mechanism comprises a pulley 18 a belt 19 and a pulley 20 a nozzle member.