SU1664725A1 - Hoisting device - Google Patents

Abstract

This invention relates to lifting devices. The purpose of the invention is to improve the performance and safety of the device. The lifting device comprises supporting front pillar and rear pillar 3 and a cantilever beam supported on them, on which the cargo trolley is mounted. On the rack 3 mounted cargo winch and counterweight, made of two parts 15 and 16. Part 16 of the counterweight is hung relative to the rack 3 and provides a margin of stability. This part 16 of the counterweight interacts with the switch 13 for the drives of the winch and the movement of the carriage. 2 Il.

Description

FIG. 2

The invention relates to lifting devices used in construction and can be used to limit the load moment in cantilever cranes.

The purpose of the invention is to improve performance and increase safety.

FIG. 1 shows a lifting device, a general view; in fig. 2 is a view A of FIG. one.

The lifting device comprises a carrier cantilever beam 1 supported on the front support leg 2 and the rear support leg 3,

A cargo winch 4 is mounted on the rear pillar 3. A cargo trolley 5 with a hook clip 6 suspended on the cargo cable 7 of the winch 4 is mounted on the beam 1 and the channel 7 is stocked on the drum of the winch 4, skipped under the beam 1, bends around the bypass unit 8 of the carriage 5, the equalizing unit 9 of the hook cage 6. the second bypass unit 10 of the carriage 5 and secured by means of a bracket 11 at the end of the beam 1.

The rear leg 3 has a crossmember 12 on which the limit switch 13 of the drive of the winch 4 and the movement of the carriage 5 and the rod 14 are mounted. On the rod 14 there is a counterweight made of two independent parts 15 and 16, one of which (part 15) provides the load capacity with a factor of 1.1 and is permanently associated with the rod 14, and the other part 16, providing a margin of stability, is mounted on the stand 17 with the formation of a gap, i.e. part 16 of the counterweight is posted relative to the rack 3 and together with part 15 provides a margin of safety with a factor of 1.5 and on.

For convenience, the interaction of the hung part 16 with the switch 13 on the crossbar 12 is pivotally mounted the lever 18, which holds the switch 13 in the position of its normally closed contacts, i.e. electric winch drive circuit 4

and the movement of the carriage 5 in the normal (initial) position is permanently closed. The device works as follows

In the case of an attempt to lift cargo weight,

exceeding by 10% or more the calculated load capacity, the rear leg 3 is raised, and part 16 of the counterweight, choosing the clearance a and hang on the rod 14, gives additional stability to the device from

tipping over. At the same time, the lever 18 is released and releases the lever of the switch 13. The electric circuit is broken and the drive of the winch 4 and the drive of movement of the carriage 5 are turned off.

Claims (1)

Claims of invention. A lifting device comprising a load driving trolley mounted on a driving beam coupled installed on the basis of the first and second pillars, behind the first of which is located the cantilever part of the driving beam, and on the second mounted cargo winch and counterweight, which is necessary to improve performance and increase security, it is equipped with a limit switch installed on the second rack and included in the control circuit of the drives of the cart and the winch and installed with the ability to interact with the last additional counterweight, supported on the base, and the second and provided with a horizontal kronshteinom, which is performed in the additional counterweight horizontal hole with clearance relative to the latter walls I 1 1