| 摘要 |
PURPOSE:To improve unraveling property and uniform unraveling tension, by ejecting fluid to a ballooning portion so that unraveling ballooning is increased during unraveling a thread from a winding bobbin for positively giving unraveling power to the thread. CONSTITUTION:When a thread is unraveled from a winding bobbin 1, a dead weight and an unraveling speed of the thread caused ballooning due to centrifugal force to be produced between the thread and a unraveling guide 8. There are various types of ballooning as shown in (a) and (b) depending upon a position of the guide 8 and a thread winding method. In particular, the ballooning state in (b) has the thread contact the edge of a thread winder, which causes irregular tension and thread cutting. Thus, fluid such as air, water is ejected from the inside to the outside of the ballooning in the unraveling direction and/or the direction normal to the unraveling direction so that a large bellooning is produced. As a result, the thread is prevented from contacting the thread winder and an unraveling power is positively increased for improving unraveling property and uniforming unraveling tension.
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