| 摘要 |
This invention relates to a device for shifting ratchet means in wind-up apparatuses which comprise a rotary wind-up drum (1) with one or more pawls adapted to cooperate with the ratchet means (17) to block the rotation of the wind-up drum (1). The wind-up apparatus presents an opening (10) for a means (2) to be wound onto the wind-up drum (1) and is adjustable such that the opening (10) will take a position that permits withdrawal in the desired direction of the means (2) wound onto the wind-up drum (1). To permit shifting the ratchet means (17) by simple means without having to dismantle the wind-up apparatus, the ratchet means (17) has one or more gripping portions (30 and/or 31) which can be caused to cooperate with the wind-up drum (1) to shift the ratchet means (17) in relation to the opening (10) by rotation of the wind-up drum (1).
|
