SU1294761A1 - Cargo tackle block - Google Patents

Description

This invention relates to a lifting and transport engineering and can be used in cranes.

The aim of the invention is to increase the functional capabilities of the hoist by changing its multiplicity.

Figure 1 shows the scheme of the polyspast at the lowest frequency; 2, the same, after increasing the multiplicity.

The cargo tackle contains blocks

1 mounted on a fixed axis

2, Blocks 1 are wrapped around the cargo lines 3. The cargo hoist contains a main hook suspension 4 fixed by means of a yoke on axle 2 and an additional suspension 5, and the number of rollers 6 of the main suspension is half the number of rollers 7 of the additional suspension. Rollers of the main and additional hangers are stocked with rope lengths

8 and 9 respectively. The ends of the segments of the rope 9 are connected to form a single flexible body of the pulley with the corresponding ends of the segments 8 locks 10, and the ends of the cargo ropes 3 - with the locks 11.

0

five

suspension 4 is equipped with slings 12, fixed to the cargo ropes 3, the device operates as follows.

When lifting and lowering tons of cargo, the frequency of the chain hoist is set to maximum. In this case, the chain hoist operates with an additional suspension 5 (figure 2).

When working with small weights, the tackle rate is halved. For this, an additional suspension 5 is laid on the floor, and the lengths of the ropes 9 are disconnected from the lengths of the rope 8 and the cargo ropes 3 by means of connecting locks 10 and 11, respectively. The ends of the rope 8 are attached directly to the ends of the cargo ropes 3 using the same locks. The main suspension 4 is disconnected from the axis 2, while the lines I2 are kept from falling. After that, the suspension is lowered to the desired level. Due to the reduction in the multiplicity of the chain hoist, the speed of the lifting and lowering operations when working with small loads increases, which allows to increase the productivity of labor when performing these works.

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Editor N. Gunko

Compiled by S. Nefedov Tehred V. Kadar

551/23

Circulation 721 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35 Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

Proofreader N. King

Claims (1)

CARGO POLYSPAST, containing blocks fixed on a fixed axis, enveloped by cargo ropes, and a block suspension with a rope, characterized in that, in order to change the ratio of the chain hoist, it is equipped with an additional block suspension, the ropes of which are connected at one end to the ropes of the main block suspension, and the others - with cargo ropes, while the main block suspension is mounted on the fixed axis of the chain hoist with the help of a hook. FIG. / s ABOUT 1.1294761