SU650951A1 - Cargo suspension - Google Patents

Description

one

Ionization of ognosigs to the field of lift-and-field machinery engineering and can be used on cargo wands of bridge cranes, loading cranes, etc. devices, the lifting mechanism of which contains a triple polyspast with three supporting branches of the rope and carries out lifting to greater heights (above 30 m).

A cargo suspension is known, comprising an upper traverse hinged on the crane and a lower traverse, which are equipped with block systems through which the cargo rope is stored, the couch mounted on the lower traverse through the swivel, and the load hook l.

The disadvantage of the suspension is that the design does not allow a signal to be obtained in order to prevent the hook from lifting at high speeds with a load. The presence of a safety device on the blocks of the upper traverse is impossible, due to the spatial movement of the traverse in any direction beyond

account pivot it to the boom of the crane. The introduction of the device on the upper unit, located on the arrow, requires the installation of a complex structure with a follower drive, since the tension force of the rope on it is variable, depending on the comfort of the rope span of the unit.

The aim of the invention is to increase the reliability of the suspension.

This is achieved by the fact that. The proposed suspension is equipped with a safety device consisting of a glass on which a microswitch with a roller is mounted, and a spring-loaded rod is placed inside, carrying a copier at one end, a microswitch interacting with a roller, and a lanyard with a swinging arm connected to it at another the upper traverse is fixedly fixed on the crane, and one of the blocks is placed on the swing arm.

FIG. 1 shows a lifting device in plan; in fig. 2 view A in FIG. 1, a longitudinal view of the cargo suspension; on fng. 3 is a view B in FIG. 2, side view of the suspension; in fig. 4 shows a section B-B in FIG. 2, a plan view of the lower graver; in fig. 5 — node 1 in FIG. 3, safety cut in section; in fig. 6 is a scheme of rope storing.

. The load suspension of the lifting mechanism 1 mounted on the platform 2 of the crane consists of the yoke 3, the bracket 4 with two blocks 5 and 6, one of which is fixed on the swing arm 7, and the safety device 8.

Traverse 3 is made in terms of a T-shape. Two blocks 9 and a swivel Yu are installed on it, to which the end of the rope 12 is fixed through a douche 11. In the center of the sheet of a triangle formed by two blocks 9 and a swivel Yu, there is a cargo crew 13 fixed by means of two earrings 14.

The bracket 4 with blocks 5 and 6 is fixed to the bottom of platform 2 so that the branches of rope 12 running down from the drum 15, stored through blocks 9 traverse 3 and blocks 5 and 6 of bracket 4, form a three-sided pyramid, which eliminates the suspension with weight.

The safety device 8 consists of a lanyard 16 pivotally connected by axle 17 to the lever 7 and located in: a glass 18 a rod 19 fitted with a spring 20. At the end of the rod 19 there is a copier 21 which communicates with the roller 22 of the microswitch 23.

Scheme of reserves of the rope is as follows: rope 12, escaping from the drum 15, is loaded through two blocks 9 on traverse 3, further spread over blocks 5 and 6 on bracket 4 and by means of the swivel 10 attached to the traverse 3.

 Cargo. Suspension works as follows.

When lifting or lowering the load due to the unchangeable position in terms of blocks 9 on the lower yoke 3 and blocks 5 and 6 on the bracket 4, and also due to the strictly coordinated stationary position of the bracket 4 relative to

traverse 3 branches of the rope along the entire height of the lift are equidistant from each other, forming a triangular suspension, which eliminates the twisting of the load.

In the absence of a load on the hook 13, the tension on the branch of the rope 12 on block 6 is absent. The spring 2O is released, the rod 19 is in the retracted position and the copier 21 is not in contact with

roller 22 microswitches 23. Microswitch 23 is off and gives a signal about the possibility of carrying out work on lifting the suspension without a load at high speed.

In the presence of a load on the hook 13 of the yoke 3, the tension force of the rope branch on the block 6 rotates the lever 7, which through the lanyard 16 moves the rod 19, compressing the spring 2O. In this case, the copier 21 via the roller 22 turns on the microswitch 23, which signals the possibility of carrying out work on lifting with a load at a lower speed. When removing the load from the hook 13 spring 2O returns the safety device to its original position.

Claims (1)

1. USSR author's certificate No. 267862, cl. In 66 C 11/16, 1968.