| 摘要 |
An inner drum extending coaxial to the outer drum is releasably secured to the winch frame. The inner drum mantle is threaded, the cross-section of the thread being capable of locating an elastic part. A sliding part has a base section which can be moved along a vertical groove on the inner side of the outer drum. This base section is joined to a grip section extending into the thread, the top end of the grip section being secured inside the elastic part. The bottom end of the elastic part is secured to the frame. The outer drum can rotate relative to the frame. |
