SU1203009A1 - Safety device for flexible current lead of cargo crane - Google Patents

Description

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The invention relates to the field of lifting and transport equipment, namely to safety devices for a flexible current lead of load-lifting cranes

The aim of the invention is to improve the reliability of a safety device for a flexible current lead of a load-lifting crane,

The drawing shows a safety device for a flexible current lead of a load-lifting crane, general view.

The safety device for the flexible current lead of the load-lifting crane comprises a base 1 made, for example, in the form of a U-direction. cylinder mounted on the supporting structure at the end of the crane-lifting track (not shown). Through the gadium, the base cylinder 1 passes the flexible cable 2 of the electrical power supply, one end of which is connected to the crane and the other is freely suspended from a junction box (not shown). Inside the guide cylinder of the base 1, a stop 3j is mounted on the cable 2, made with a groove 4 in the middle part and with beveled ends 5o. The lever 6 is articulated in the middle part with the base 1, one end holds the stop 3, and the other through the rod 7 connected to the end switch i 8, included in the control circuit of the drive motor of the load-lifting crane and in the circuit of the alarm unit (not shown), the rod stop 9 presses the spring 10e, the other end of which is the editor T. Kugrsha Order 8377/26

Compiled by A. Gideonov

Tehred 0, Vashchishin Proofreader A. Obruchar

Circulation 803 Subscription

VNIIPI USSR State Committee

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

Branch PPP Patent, Uzhgorod, st. Project, 4

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30092

into the bracket 11 of the base 1. On the lever 6, the stop 12 is fixed, on which the plate 13 is supported, formed with a groove 14. One end of the handle 15 is hingedly connected to the base

1, the end of the plate 13 is hinged in the middle part of the handle 15, the spring 16 is connected to the plate 13 and the base 1 and presses the plate 13 against the stop 12.

The safety device for the flexible power supply of the load-lifting crane operates as follows.

With an unacceptable increase in force in the cable 2, the stop 3 rotates the lever 6, which compresses the spring 10 and acts on the switch 8, while the crane stops and the stop 3 with the freely suspended part of the cable 2 moves towards the crane, reducing the force the entire cable 2. Simultaneously with the rotation of the lever 6, the groove 14 of the plate 13 falls on the stop 12 and the lever 6 is fixed in the rotated position.

In order to insert the stop 3 back into the guide cylinder of the base 1, it is necessary to rotate the handle 15 counterclockwise (drawing), while the lever 6 rotates and will not interfere with the insertion of the stop 3 into the guide cylinder of the base 1. After installing the stop 3 in the initial position the handle 15 is returned to its original position, with the stop 12 of the lever 6 extending from the groove 14 of the plate 13 and the lever under the action of the spring 10 occupies the original position at which it fixes the stop 3 of the cable 2 in the guide cylinder of the base 1.

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Claims (1)

SAFETY DEVICE FOR FLEXIBLE CURRENT SUPPLY OF A LIFTING CRANE, containing a lever, spring-loaded relative to the base, pivotally mounted on the latter in its middle part, interacting at one end with a suspension bracket of the flexible current supply mounted in the guide of the base, and the other with a limit switch mounted on the base and included in the control circuit of the crane movement drive, characterized in that, in order to increase reliability, it is equipped with a stop fixed on the first end of the lever, with a groove on one end, emphasis laid on the arm and spring-loaded relative to the base, and the handle, the end of which is pivotally connected with the base plate and the other end is pivotally mounted in the middle part of the handle. ι: