SAFETY DEVICE FOR CLIMBERS
A safety or braking device, especially for climbers, with a casing ( 11 ) containing a rotatable-mounted pulley ( 12 ) for a rope ( 13 ) and a guide ( 14 ) forcing the rope ( 13 ) to wrap around the pulley ( 12 ) with a shaft ( 19 ) of the pulley ( 12 ) connected to a centrifugal brake ( 15 ), wherein a brake drum ( 16 ) of the centrifugal brake ( 15 ) is pivotally mounted to the casing ( 11 ) and swivels when the rotational speed of the shaft ( 19 ) of the pulley ( 12 ) exceeds a critical value and forces a pressing element ( 17 ) connected to the brake drum ( 16 ) against the rope ( 13 ), thereby clamping the rope ( 13 ) between the pressing element ( 17 ) and the guide ( 14 ).
1 . Safety or braking device, especially for climbers, with a casing ( 11 ) containing a rotatable-mounted pulley ( 12 ) for a rope ( 13 ) and a guide ( 14 ) forcing the rope ( 13 ) to wrap around the pulley ( 12 ), with a shaft ( 19 ) of the pulley ( 12 ) connected to a centrifugal brake ( 15 ), characterized in that a brake drum ( 16 ) of the centrifugal brake ( 15 ) is pivotally mounted to the casing ( 11 ) and swivels when the rotational speed of the shaft ( 19 ) of the pulley ( 12 ) exceeds a critical value and forces a pressing element ( 17 ) connected to the brake drum ( 16 ) against the rope ( 13 ), thereby clamping the rope ( 13 ) between the pressing element ( 17 ) and the guide ( 14 ).
2 . Safety or braking device according to claim 1 , characterized in that the pressing element ( 17 ) is clamping the rope ( 13 ) such, that the higher the braking force of the centrifugal brake ( 15 ) the more the rope ( 13 ) is pressed against the surface of the pulley ( 12 ).
3 . Safety or braking device according to claim 1 , characterized in that that brake drum ( 16 ) swivels driven by the torque of that pulley shaft ( 19 ) as soon as the flyweights ( 23 ) of that centrifugal brake ( 15 ) come into contact with that brake drum ( 16 ).
4 . Safety or braking device according to claim 1 , characterized in that that pressing element ( 17 ) is extending between the two sections ( 13 . 1 , 13 . 2 ) of that rope ( 13 ) entering and leaving that pulley ( 12 ).
5 . Safety or braking device according to claim 1 , characterized in that a first end of that rope ( 13 ) can be fastened to a climber while a force is applied to the section ( 13 . 2 ) of the rope ( 13 ) that leaves the device ( 10 ) on the other side of the pulley ( 12 ), thus holding the rope ( 13 ) under tension when the climber is moving towards that device ( 10 ).
6 . Safety or braking device according to claim 5 , characterized in that that force is caused by a counter-weight ( 30 ) hanging on the rope section ( 13 . 2 ).
7 . Safety or braking device according to claim 6 , characterized in that that casing ( 11 ) has a lateral extension ( 18 ) to which a second end ( 13 . 3 ) of the rope ( 13 ) is fastened.
8 . Safety or braking device according to claim 7 , characterized in that that counter-weight ( 30 ) is slide-mounted to the rope section ( 13 . 2 ) extending between a fastening point ( 18 . 1 ) of the second end ( 13 . 3 ) of the rope ( 13 ) and the pulley ( 12 ).
9 . Safety or braking device according to claim 1 , characterized in that the guide ( 14 ) forces the rope ( 13 ) to wrap around the pulley ( 12 ) at an angle of at least 90°.