SU1404431A1 - Method and apparatus for determining gravity centre of load - Google Patents

Abstract

The invention relates to lifting machinery. The purpose of the invention is to increase productivity. The traverse includes a carrying longitudinal frame 3, an intermediate element 5 moving relative to the frame, a hinge loop 6 on a crane hook moving relative to intermediate element 5, and a dynamometer 8. When lifting, fix the position of the load when it touches the support with one side. The force gauge acting on the crane hook is measured on the dynamometer. From the equilibrium condition of the cargo, the approximate location of its center of gravity is determined. After that, the hinge loop 6 is displaced by this distance in the direction corresponding to the location of the center of the body weight of the load. The process then repeats. 2 sec. n. f-ly, 3 ill.

Description

(L

with

and

four

with

The invention relates to lifting machinery.

The goal is invented - increased productivity.

FIG. 1 shows the traverse with the load; general form; in fig. 2 - the device, top view; in fig. 3 - the process of lifting the load.

The load 1 is attached to the traverse 2 containing the supporting longitudinal frame 3 with the hooks 4 for the load. 1, an intermediate element 5, which can be moved relative to the frame 3, a hinge loop 6 on a crane hook 7 and a dynamometer 8.

Since the center of gravity of the load in general does not lie on the same vertical with the hinge loop, when lifting the load, the latter rises obliquely. Fixing the position of the load, when it touches the support with one side, measures the force acting on the crane hook with a dynamometer. From the equilibrium condition of the load, the distance from the point of suspension to the approximate location of the center of gravity of the load is determined.

0.02-- - 0, / (,,

where O 02 is the horizontal projection of the distance between the point of suspension and the approximate location of the center of the body weight of the load;

 - horizontal projection of the distance between the point of suspension and the point (line) of contact of the load; P is the weight of the load;

Si is the force acting on the crane hook, as determined by the dynamometer.

After that, moving the intermediate element 5 along the longitudinal frame 3 and the hinge loop 6 along the intermediate

ABOUT

0

about

five

five

element 5 moves the hinge loop over the distance OiOz towards the approximate location of the center of the weight plate of the load, after which the process is repeated

Claims (2)

1. A method for determining the center of gravity of a load connected to a crossbeam, which consists in changing the position of a hinge loop on a hook of a load-lifting machine, characterized in that, in order to increase productivity, lift the load with its one side supported, measure the force acting on the crane hook, from the condition of equilibrium of the load when it is unilaterally supported, determines the distance from the point of suspension to the approximate location of the center of gravity of the weight of the load; move the hinge hook to this distance towards This location of the center of gravity of the cargo and consistently repeat this process until the suspension stitch is precisely aligned with the center of the body of the cargo. 2. A device for determining the weight center of a load, comprising a traverse, comprising a load-bearing longitudinal frame with cargo grips, an intermediate element moved relative to the frame, and a traverse attached to the hook of the load-lifting mashine along the intermediate element, so as to increase performance, the intermediate element is made in the form of a rectangular flat shape with the possibility of longitudinal movement along the longitudinal frame of the traverse, and the device is equipped with a loop-mounted Ski crosspiece dynamometer for measuring forces acting on the crane hook. in CRH. XH FIG. 2