| 摘要 |
<p>A quick-release retainer for the brake support (17) of weft feeders for textile machines, wherein the brake support is rigidly coupled to a slider (18) which is controlled by a precision adjustment system which is constituted by an adjustment screw (23a) which meshes with a female thread (22) which is rigidly coupled to the slider, in order to move the slider and the brake support parallel to the drum (12) of the feeder (10) in order to vary the static tension applied to the thread (F) by the brake (15), and wherein the entire adjustment system can move rigidly with the slider (18) and is subjected to the action of a spring (26) which tends to move the brake support (17) into a disengagement position, in which the brake (15) is spaced from the drum (11) of the feeder (10). The spring (26) is contrasted by a controlled stop element (28), which engages a corresponding groove (29) of the pin (23) of the screw in order to keep said spring (26) normally loaded and keep the brake (15) in the active position in contact with the drum (11); the disengagement of the stop element (28) causes the snap movement of the slider and of the brake support into the disengagement position of the brake (15). <IMAGE></p> |
