| 摘要 |
<p>A device for controlling the reciprocating motion of the thread- guides (4) during a winding operation making it possible to produce biconical bobbins (1). The device comprises a cam (2) with a helical groove transmitting a reciprocating movement to a slide (3) which controls a bar (20) extending over the entire length of the loom, and for each winding position, a thread-guide (4) mounted pivotally on a support body (9) integral with the aforementioned bar. The thread-guide (4) is mounted on the end of a right-angled arm (21), the other end (22) of which comprises a roller (5) which is guided in the groove (8) of an inclinable bar (6) synchronously with the formation of the wound package (1). In this device, the ends (10)-(23) of the guide groove (8) of the bar (6), in which groove the roller (5) controlling the angular movement of the thread-guide (4) bears, are curved in opposite directions so as to communicate an acceleration to the thread-guide (4) at the end of its travel, making it possible to distribute the thread at a constant speed. <IMAGE></p> |
