Oil discharge device of upper looper mechanism in overlock sewing machine

摘要

In an upper looper holder guide 7 through which an upper looper holder 12 penetrates, a first oil discharge hole 27 is opened in the edge at the upper end of a through-hole 11 and a second oil discharge hole 28 opened in the groove 26 and are branched off, the opening of the first oil discharge hole 27 contacts with the upper looper holder 12 , and the opening of the second oil discharge hole 28 and groove 26 are exposed from a longitudinal hole 6 of an upper looper base 4 when the upper looper holder 12 reaches the top dead center or the bottom dead center. The oil discharge device is composed of a two-layer trochoid pump.