| 摘要 |
The appts. to remove yarns wound round the bottom of spindles, in ring spinning or twisting machines, has a roller with free rotation with a coaxial cutter (42) over the detaching section (43). A separate drive section (44) is at the roller, axially adjacent to the detaching section (43) so that, when the drive sections (44,42) are in action, the roller detaching section (43) is at a gap (A) of <= 5 mm from the spindle surface (14) with the underwound yarn at the spindle (1). At the spindle (1), a drive section (13) with a downwards taper is under the blade disk (12), with a mean cone angle of at least 30 deg . The roller, which is defined at the top by the detaching section (43), has a narrow and combined cutting and drive section (42) towards the drive section (13) of the spindle (1). The free rotation roller has a movement along its axis between an upper limit stop (332) and a lower spring (333). The combined cutting and drive section (42) of the roller is formed by a narrow ring extending radially outwards over the detaching section (43). It is under the detaching section (43) to maintain the gap between the detaching section (43) and the yarn underwinding surface (14) and to support the drive of the additional rolling section (44) projecting radially outwards over the detaching section (43). The detaching section (43) has a rough and flash-free surface. The tapering drive surface (13) of the spindle (1) is wear-resistant. The roller has a lever (33) to press it against the spindle (1), which swings on a vertical axis at the slide (3) and is held by a spring (35). It rotates on a vertical pin (331) with ball bearings (41). The vertical pin (331) which carries the roller has the limit stop (332) and the spring (333) to push up the ball bearing. The lever (33) has a threaded drilling in the swing direction with a setting screw, which has a fixed limit stop at the slide (3). The roller has a base body to take the ball bearing (41) and a detachable function ring to take the detaching section (43), the combined cutting and drive section (42) and the rolling section (44). The roller is at least, apart from the function ring, of a metal material with a density of /-3.5 g/cm<3>. The suction channel at the slide (3) is connected to a central suction channel (6) fixed to the frame and extending along the row of spindles. The central suction channel (6) has pref. at least one upper opening (61) near all the spindles (1). The opening (61) is closed by a flexible sealing strip (5) over it. A guide at the slide (3) lifts the sealing strip (5) clear of the upper surface of the central suction channel (6) within a defined zone (51). The drive belts (7,7') for the slide (3) are fixed closely over the suction channel sealing strip (5) by couplings at both ends of the slide (3). Guides (62,63) for the slide drive belts (7,7') are at the central suction channel (6) outside the movement path of the slide (3).
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