| 摘要 |
An adjustment device for the amplitude and direction of feed of cloth in a cloth transport mechanism for a sewing machine comprises a slideway centered on a trajectory in contact with a pivot pin between a connecting rod integral with an eccentric of a drive shaft and a short connecting rod linked to a lever associated with one end of the cloth transport member. This slideway may be oriented about a point situated in the middle of the trajectory of the pivot point to modify the inclination of the trajectory, and, in this way, the amplitude and the direction of the feed. To avoid any play between the slideway and the pivot pin, this latter carries two rollers in the shape of truncated cones, and the slideway has two tracks, inner and outer, displaced axially along the axis of pivoting in such a manner that each roller can only be put in contact with one of the two tracks by a resilient pressure and can roll without slipping against it.
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