| 摘要 |
PURPOSE:To reduce the wear of a wire guide by making the velocity ratio between a fixed gear means and one intermediate gear means and the velocity ratio between a floating gear means and the other intermediate gear means equal to each other so that the wire guide can stop irrespective of the rotation of a spindle. CONSTITUTION:Serrated toothed belts 17a and 17b are respectively wound around and moved between intermediate pulleys 15a and 15b at both ends of a rotating shaft 14 and a fixed and floating pulleys 11 and 16 so that rotating forces can be transmitted at the same velocity ratio. When a spindle 3 is rotated, the paired intermediate pulleys 15a and 15b become planet gears and simultaneously roll on the peripheries of the pulleys 11 and 16. As a result, the rotating force of the spindle 3 against the supporting shaft 9 of a wire guide 7 is canceled and the wire guide 7 can be maintained in a relatively still state. Therefore, the wire guide 7 does not rotate together with the spindle 3 even when the spindle 3 is rotated at a high speed and the wear of the wire guide 7 can be prevented. |
