LET-OFF MOTION FOR FILAMENTARY MATERIAL

PURPOSE:To make the absorptivity of vibrations at the delivery side and tension variation so excellent a degree as well as to prevent an adverse effect to the after- process from occurring, by installing a lap belt being rolled on a belt suspension device and contacted, with pressure, with a delivery roll elastically, and a driving device for releasing this pressure-contact. CONSTITUTION:Both belt suspension rolls 10 and 10 are provided with a strip lap belt 12 which is rolled on between a belt suspension device 9 to be situated in the inside on a tangential extension of the outer circumference of a delivery roll 8 and these belt suspension rolls 10 and 10, and elastically presses the responsive motion side to the outer circumference of the delivery roll 8. And, a filamentary material let-off motion 1 is constituted together with a driving device 13 which moves the belt suspension device 8 and releases the lap belt 12 from the pressure-contact with the delivery roll 8. With this constitution, a sizable long interval of the outer circumference of the delivery roll 8 is forcedly pressed by the lap belt 12, while a traveling filamentary material l is held between the delivery roll 8 and the lap belt 12, securing sufficient restraint, whereby vibrations at the delivery side and tension variations are effectively absorbed and removed with this long pressure-contact interval, so that any adverse effect to the after-process is preventable.