CABLE BRAKE FOR A BALANCER

Abstract: The invention concerns a cable brake (2) for a balancer. The balancer (1) in this case is used as lifting device to lower or to descend small and especially clumsy loads (20). The type of balancer used has the possibility to block the cable manually. The cable brake consists of a double spool (6) on which the cable (12) from the balancer on is wound on one side and on the other side the cable (17) for the object to be lowered. Both cables are fixed to the spool. The spool is connected through a freewheel (11) with the incoming shaft (9) of a accelerating wormgear. On the outgoing shaft (8) of the wormgear a friction brake is mounted with friction shoes (14) which are actuated by centrifugal force. The friction shoes are suitably prestressed with a compression spring (16) against the brake lining. The freewheel is installed in such a way that the brake will come into action when the cable is pulled into the balancer, while on descending the load the freewheel leaves the spool free. In some cases it is possible to install a permanent installation and instead of a balancer use a counterweigth in combination with the cable brake.

Description: Cable brake for a balancer. The invention concerns a cable brake for a balancer. The balancer in this case is used as lifting device to lower or to descend small and especially clumsy loads, for instance in cellars. An application is the bringing down of beer-casks into the cellar of a cafe. The weight of the beer-casks and often the limited space make this work risky and tiring. The invention uses a balancer which is very useful for handling small loads, however when the load is unhooked the cable is pulled back with force into the device. The cable brake of this invention prevents this forceful pulling back of the cable and the danger of a dangling hook An additional advantage is the fact that there is no need for an external source of energy. The type of balancer used has the possibility to block the cable manually. The cable brake consists of a double spool on which the cable from the balancer on is wound on one side and on the other side the cable for the object to be lowered. Both cables are fixed to the spool. The spool is connected through a freewheel with the incoming shaft of a accelerating wormgear. On the outgoing shaft of the wormgear a friction brake is mounted with friction shoes which are actuated by centrifugal force. The friction shoes are suitable prestressed with a compression spring against the brake lining. The freewheel is installed in such a way that the brake will come into action when the cable is pulled into the balancer, while on descending the load the freewheel leaves the spool free. In some cases it is possible to install a permanent installation and instead of a balancer use a counterweight in combination withe the cable brake. The invention is described with the help of the drawings. Fig. 1 shows the cable brake with balancer. Fig. 2 shows face II - II Fig. 3 shows the double spool. Fig. 4 shows an installation with a counterweight. In Fig. 1 is shown the combination of balancer (1) and cable brake (2). Balancer (1) is hooked with hook (3) to a beam of the building. Cable brake (2) consists of wormgear (4), brake (5) and double spool (6). Wormgear (4) is secured with connection piece (7) to balancer (1). Brake (5) is mounted on wormgear (4) at the side of the (outgoing) wormshaft (8). On the (ingoing) wormwheelshaft (9) is mounted double spool (6). Double spool (6) has bearing (10) and locking bearing (11) which permits one way turning. Locking bearing (11) acts as a freewheel in such a way that by the reeling in of the cable (12) into balancer (1) wormwheelshaft (9) is taken with. Cable (12) is secured to double spool (6). The gearing of wormwheel to wormshaft (8) is accelerating On wormshaft (8) is mounted disk (13) which carries two brake shoes (14) Brake shoes (14) rotate on bolts (15) Between brake shoes (14) is a compression spring (16) located When the load is taken off, cable (12) is reeled off in balancer (1) and with it reels-in load cable (17) on double spool (6) load cable (17) is secured to double spool (6) With reeling in wormwheelshaft (9) is driven by locking bearing (11) where wormshaft (8) is turned with greater speed Brake (5) will brake the turning of wormshaft (8) by the pressure of spring (16) and the centrifugal force on brake shoes (14) The result is that the cable (17) is reeled in on double spool (6) with a nearly constant speed The initial force on the brake is adjusted by the choice of spring (16) Load cable (17) is led through eye (18) and this services as stop for load cable (17) Double spool (6) can have different diameters for cable (12) and load cable (17) In this way it is possible to anticipate to the work situation and the load that has to be lowered In some cases a straight gearing can be used instead of wormgear (4) Wormgears which operate without self-fnction are preferred In Fig 4 is shown an arrangement where beer-casks (20) are let down into a cellar Instead of a balancer (1) is used a counterweight (19) A not drawn cable block is provided to stop cable (17) Brake (5) is used particularly there where always the same small loads have to be unloaded or let down The arrangement is used as follows Balancer (1) is set such a way that the load by itself goes down controlled When the load is fastened cable block is set free and the load is taken up with small force and brought above the opening The load can go down Arrived at the bottom the cable block is set and the load released The cable block is released and the cable is reeled in with fπction Cable block is set when the new load has to be fastened

Claims: Claims 1 Cable brake for balancer which is used for letting down loads characterised in that the cable brake (2) is foreseen with brake shoes (14) which are activated by centrifugal force, generated via transmission (4) from spool (6), where pressure spring (16) provides initial brake force, while cable brake (2) is uncoupled with going down of the load (20) 2 Cable brake for balancer according to claim 1 characterised by that cable brake (2) consists out of double spool (6) which is mounted with freewheel (11) on incoming wormwheelshaft (9) of transmission (4) which has on the outgoing wormshaft (8) a centrifugal brake (5) 3 Cable brake for balancer according to claim 1 and 2 characterised by that transmission (4) is an accelerating worm transmission which is not self-braking 4 Cable brake for balancer according to claim 1 , 2 and 3 characterised by that transmission (4) is an accelerating straight gearing 5 Cable brake for balancer according to claim 1 , 2, 3 and 4 characterised by that cable brake (2) is secured to balancer (1) 6 Cable brake for balancer according to claim 1 , 2, 3, 4 and 5 characterised by that a counterweight (19) is used instead of a balancer * * * *

Inventors: KOSTER RUDOLF, KOSTER, RUDOLF
Applicants: ARBO GROEP GAK B V, KOSTER RUDOLF, ARBO GROEP GAK B.V., KOSTER, RUDOLF
Application year: 2000
Main classification: B66D5
IPC codes: B66D5