Patent ID: 8056702
Filing Date: 2011-11-15
Classification: F16H

Abstract:
1. A feeder comprising a forward and reverse winder which can rotate forwardly and reversely, forwardly and reversely winding linear bodies to be wound and rewound through the forward and reverse winder, and a reciprocating body to forwardly and reversely move by means of guide means when it is subject to a forward force or a reverse force; said forward and reverse winder comprising a support shaft driven by a motor and having an exterior part on a periphery of said support shaft, a movable cylindrical body fitted onto the periphery of said support shaft integrally with said support shaft, a cylindrical winding drum having a female screw thread on an inner circumferential face thereof, a stationary cylindrical feeding screw body having on its outer periphery a male screw thread to be engaged with the female screw thread of the winding drum wherein said winding drum is threadedly engaged onto said stationary cylindrical screw body; said cylindrical winding drum is coaxially connected to an outer periphery of said movable cylindrical body through a space, said forwardly and reversely winding bodies being arranged to be wound and rewound by said winding drum of the forward and reverse winder; the amount of winding the forwardly winding linear body by the winding drum of the forward and reverse winder and the amount of rewinding the reversely winding linear body by the winding drum of the forward and reverse winder are equal to each other and also the amount of rewinding the forwardly winding linear body by the winding drum of the winding drum of the forward and reverse winder and the amount of winding the reversely winding linear body by the winding drum of the winding drum of the forward and reverse winder are equal to each other; and the winding drum of the forward and reverse winder on its winding rotation moving in an axial direction through engagement of said stationary cylindrical screw and said female thread in accordance with a winding pitch and a rewinding pitch, wherein during the axial movement of the winding drum, said stationary cylindrical feeding screw body is arranged between the winding drum and the movable cylindrical body.