| 摘要 |
PURPOSE:To miniaturize a device, to reduce the sliding distance of each part and to improve the service life by providing the groove of the slider guide member provided on a crankshaft in the tangent line direction for the circle centering around the crankshaft. CONSTITUTION:When a driving shaft is rotated in counterclockwise direction, the main gear 8' of the right part is rotated in clockwise direction and the main gear 8 at the left part in counterclockwise direction. And levers 9, 9' are respectively driven in the same direction via an eccentric pin 11 and slider 12 and crankshafts 2, 2' are driven as well. In this case, the crankshafts 2, 2' exert unequal velocity rotation against the main gears 8, 8' exerting equal velocity rotation by the actions of the eccentric distance (e) between the centers O, O' of the crankshafts 2, 2' and main gears 8, 8' and that (e') from the center O of the crankshaft 2 of the center line P of a groove 13 and a slide exerts quick return movement. Thus, quick return movement is performed by a press with simple structure and easily applicable for the press of two points.
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