SU732202A2 - Safety device of jib crane windlass - Google Patents

Description

(54) WINCH

one

The invention relates to lifting mechanisms, namely to high-capacity winches equipped with cable-laying machines.

According to the main author. St. N 441234 is a known winch used for laying rope of different sections. This winch is made in the form of a stepped drum and a cable laying machine, the number of running screws of which is equal to the number of drum steps. Rope-laying machine is equipped with a carriage with a switch of leads that interact with the driving screws. A transition groove opposite to the groove of the adjacent direction screw is made on each of the lead screws of the cable stacker.

A disadvantage of the known winch is that when reversing, the carriage moves to another section of the drum, since the movement of the carriage in this case is carried out by a groove in the same direction as in the transition section.

Thus, the winding and winding is disturbed in the preverse, and the winch cannot work.

The aim of the invention is to improve the reliability of the winch in operation.

For this, in the winch the grooves of the screws are provided with recessed supports.

FIG. 1 depicts a rope laying machine; in fig. 2, the node T of FIG. 1 section of the transition to an endless thread in a single,

10 view from above; in fig. 3 - section A-A of FIG. 2

The winch contains a drum, made of two sections 1 and 2 (steps) of different diameters, rope laying with

15 with two screws 3 and 4 and a lead 5. The laying of the rope is carried out by the forward movement of the carriage 6. Both screws of the rope laying machine have two sections of the helical groove, with one section “- one end of the entrance screw groove, and the other endless. In the place of transition of a single-slotted groove into an infinite recess is made, in which there is a hinge on the axis 7) -

but the stop 8 is fixed, spring-loaded spring 9. When winding the rope on the section of drum L, the leash 5 of the carriage 6 is engaged with the groove of the screw 4, and the movement goes along the left groove, and since in the sections LL of the screw 3-groove of the opposite direction, then the carriage cannot move to sections Lg, L. In FIG. 2, the direction of movement of the driver is indicated by an arrow. When winding the last layer of rope in section L, the carriage switches to screw 4. The carrier 5 of the carriage, passing through the sections of the groove LJ "L, presses the stop 8, embeds it in the recess and runs to the section L. After that, the stop 8 under the influence of the spring 9 returns to its original position and closes the entrance to the groove of the section L, as shown in FIG. 3. When laying the rope on section 2, the leader 5 of the carriage is engaged with the endless groove of the screw 4, moving all the time along the left groove. During the reverse, i.e., when unwinding the rope, the leash moves in the opposite direction

SRI, but cannot switch to sections LL, since the groove is closed by stop 8. When unwinding the last layer of rope in section L, the lead of the carriage automatically switches and engages with the groove of screw 3. After winding the last layer of rope from section 2, the leash 5 of the carriage passes and, having drowned an emphasis 8 of the screw 3, passes to a site l.

Thus, the recessed lugs 8 impede the transition of the leader of the cable-laying carriage from the section of the endless helical groove to the section of the single-passage groove and increase the reliability of the cable-laying device when the winch reverses.

Claims (1)

Formula to avoid Winch on auth. St. No. 441234, characterized in that; in order to increase its reliability in operation, the grooves of the screws are equipped with recessed mi stops. eight FIG. 2 Aa 73 fttf.3