| 摘要 |
PURPOSE:To decrease the number of parts and fulcrums and to improve durability and accuracy by changing the angle of inclination of a torch support where the welding point at the forward end of said support is positioned always on the specified virtual perpendicular. CONSTITUTION:When an oscillation arm 6 is oscillated around the 1st fulcrum shaft 5, the 2nd transmission wheel 12 is rotated by an endless turning body 13 for transmission in the oppsite direction to the oscillation direction of the arm 6 by the same angle as the oscillation angle. Since the rotation of the wheel 12 is transmitted with the 2nd fulcrum shaft 7 to a torch support 8, the angle of the torch 9 supported to the support 8 to the horizontal plane changes continuously on the perpendicular two-dimensional plane. The welding point 10 at the forward end of the torch 9 in this stage is always located on the perpendicular 18. |
