SU60451A1 - Cantilever rotary crane - Google Patents

Description

Cantilever pivotal cranes are known: they are fitted with a horseshoe-shaped beam for guiding the cable, which rotates the cantilever by turning the fork connected to the horseshoe-shaped beam and covering the lifting cable. In the proposed crane, a horseshoe beam is mounted on the crane mast with the possibility of moving it along with the fork in height simultaneously with the lifting or lowering of the load. This provides the ability to rotate the console at any height of the mast.

FIG. 1 shows a partial side view of the proposed crane; in fig. 2 is the same top view; in fig. 3 shows the arrangement of cables used to rotate the console; in fig. 4, 5, 6 and 7-parts crane.

On the mast 20, guides 17 are installed to vertically move the carriages 16 equipped with rollers 18. A horseshoe-shaped beam I is attached to the carriages. Designed for guiding the cables 4 and 5, which serve to turn the crane console. The cable 5 is fixedly mounted with a cone 19. At the top of the mast. From the point of attachment, the cable 5 goes down, bends around the roller 10 mounted on the tail end of the beam /, and passes over the rollers 2 placed on the beam /. Further, the cable bends around roller 6 and goes along rollers 3, bending roller 11. From this roller, cable 5 goes down along the mast, bends around roller 12 and goes to the winch. Cable 4, similarly fixed to the mast, is directed to roller 7 and also goes down. The rollers 6, 7 are located in the frame 8 mounted on the rotary fork 9. The cables 4 and 5 serve to rotate the fork 9 together with the load platform 30. The carriage 16 carrying the beam 1 is raised and lowered by an auxiliary endless cable 24 enveloping the rollers 22 and the pulley 21 and moving simultaneously with the lifting cable 23. The simultaneous movement of the cables 23 and 24 can be achieved, for example, by connecting them; the cable 24 is connected at one end to the lifting cable 23 and the other to the horseshoe-shaped beam.

The rotation of the fork 9 on its supporting beam / can be carried out either by means of a manual actuator 13 and 14 or mechanically. The stops 37 limit the rotation of the fork.

Rod 28, used for hanging the lifting platform 30 or gripping the lifting cable 23, for 339

connected to two cables 26 to the hook 25, mounted on a fork 9. A lifting cable 23 in the upper part of the mast bends around the pulley 21 and goes down to the winch.

To ensure the simultaneous rotation of the platform 30 and the pulley 21, an additional horseshoe beam 45 can be applied, along which the cables 41 and 42 connected with the cables 4 and 5 move,

The subject of invention

Claims (3)

1. A cantilever slewing crane using a horseshoe-shaped beam to guide the cable turning the cantilever through turning the fork connected to the horseshoe beam 1 and covering the lifting cable, characterized in that the horseshoe beam / mounted on the mast of the crane with the possibility of moving it along with the fork in height simultaneously with the raising or lowering of the load. 2- The form of execution of the crane according to claim 1, is distinguished by the fact that, in order to raise or lower the beam / simultaneously with the lifting or lowering of the load, an auxiliary was used. a tether cable 24, one end of which is connected to a lifting cable 23, and the other with a horseshoe beam 1. 3. A crane according to claim 1, characterized in that for turning the fork 9 at a predetermined height, cables are used, envelopes rollers b and 7 mounted on the fork 9 and fixed at one end 19 in the top: parts of the crane mast and connected to the turn mechanism with the other end . FIG. one 2 / / J 5ff / four - -