| 摘要 |
PURPOSE:To set a bending angle of a pipe easily and accurately, by providing respective supporting axes to respective eccentric positions of two mutually separated gears, and one end of a driving link is connected to the axis of one side freely rotatably, and the middle part of the link is connected to the axis of the other side in the same manner. CONSTITUTION:A rotating quantity of a driving prime mover 21 for bending is determined by rotating a motor 26, used for controlling the bending quantity, by a quantity corresponding to a desired bending quantity of a pipe 16, and the prime mover 21 is rotated simultaneously. Thus, a pinion gear 23 turns in the direction of the arrow to rotate gears 29 and 30 in the same direction and by the same angle theta each. Accordingly, bending-supporting axes 35, 36 are turned by the same angle theta each to move a driving link 18 along a circular arc having a radius corresponding to the distance between the supporting axes 35, 36 and the gear axes 33, 34. Therefore, a driving pin 19 also moves along a circular arc having the same radius around a bending ring, a rotating center, to turn a bending arm 12 in the direction of the arrow by a set angle theta. Then the pipe 16 is bent by a radius of curvature R. |
