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(11) | EP 0 926 277 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Spindle for a spinning machine |
| (57) A spindle for a spinning machine is provided which can prevent a bobbin from slipping
even if rotational speed changes are great during the starting and stopping of rotation,
and in addition which decreases the pulling force and insertion force needed to exchange
bobbins. A plurality of recesses (3) are formed at equal intervals in a top portion
of the spindle (1). An annular groove (4) is formed in an inner circumferential surface
of each recess (3). A cap (5) is received in the recess (3) with a part of the cap
(5) projecting outside of the circumferential surface of the spindle (1). A coil spring
(6) is disposed within the recess (3). A ball (7) is disposed inside of the coil spring
(6). The spring force of the coil spring (6) is set at such a level that a biasing
force that can prevent slippage of the bobbin (2) is applied to the cap (5) even when
the rotational speed changes are great during the starting and stopping of rotation.
The ball (7) is formed to have a weight wherein the sum of the biasing force of the
coil spring (6) to the cap (5) when a full bobbin (2) is rotated and the biasing force
caused by the centrifugal force of the ball (7) can prevent the slippage between the
fully wound bobbin (2) and the cap (5). |