| 摘要 |
In a crane with a braked hoisting winch a hoisting cable (6) runs over pulleys of which at least one (9) is carried by a working cylinder (10) attached to the bedframe of the crane, and which allows alteration of the distance between the bedframe and pulley. The working cylinder (10) is connected to the brake (12) via a braking force regulator (14). The braking force is reduced when the brake is on when a jerk of a given size occurs on the hoisting cable (6), whereby the jerk stress on the crane can be reduced. |
