| 摘要 |
PURPOSE:To utilize the motion for release of a front bar, which clamps a form, to release a rear bar, which clamps the form, from attraction of a permanent magnet. CONSTITUTION:When a command for reset to an initial state is issued, a drum 1 starts rotating in a speed for winding. A command for rotation of a cam is issued by the output of a detector which detects that a rear bar 4 passes through a prescribed position. When a cam shaft 11 is rotated at a prescribed angle on a basis of the command for rotation, a bar switching lever 21 is returned to the original position, and a stop lever 8 becomes free from a cam 12 and is slided and brought into contact with the outside circumference of a drum stop cam 7. Cams 12 and 24 are rotated furthermore and are returned to original positions and are stopped. By returning of the lever 21 to the original position, a rear bar lever arm 18 is turned by a pin 22 in accordance with rotation of the drum 1, and therefore, a bracket 14 is pressed upward. When the drum 1 is rotated furthermore, the bracket 14 is pressed upward furthermore, and a pin 17 presses a front bar 3 upward, and as the result, the rear bar is separated from a magnet 5. |
