SU436787A1 - Gantry crane - Google Patents

Description

This invention relates to lifting masts, namely gantry cantilever cranes.

Famous gantry crane, containing mounted on supports a cantilever superstructure and a load trolley movable along it with a lifting polyspast. However, under the action of the lifted load, the span in such a crane experiences a large lateral bending load, which leads to an increase in the weight of the crane.

The purpose of the invention is to reduce the weight of the crane by unloading the span of a; transverse bending.

This is achieved in that the crane is made with a carriage connected to the trolley, moving at least one discharge cable attached to the ends of the consoles, and receiving the load from the lifting nolispast, and along the crane consoles additional guides provided at the supports are provided. transitional naklopnymi areas for onirapi unloading rope, laid along additional guides when moving carriage on them.

FIG. 1 shows the proposed crane, a general view; in fig. 2 and 3 — span of the crane, transverse sections; in fig. 4 - cantilever part of the crane span.

lengthwise cut; in fig. 5 - cargo trolley with a carriage in position I on the middle part of the crane span; in fig. 6 - the same, in position II on the crane console. The gantry crane contains a cantilevered span structure 1. installed on support 2 and made in the form of a beam with an open profile below, containing external guides 3 on the lower half of the Ji support 2 and on the console

The span structure 1 on the inside of the beam profile contains additional guides 4, spliced with transitional paclon sections 5. Along the span structure, the bottom of the bridge is tensioned parallel to two unloading cables 6, which rest on the transient inclined sections 5 of additional guides 4 and are attached to the supports of consoles in the sleeves 7. The crane contains a trolley 8 (see

FIG. 1, 5, 6), made in the form of a hanging frame, moving along the outer rails 3 of the superstructure pa driving wheels 9. On the cargo trolley 8 is placed the winch 10 of the load lifting mechanism. TO

the frame of the trolley 8 by means of the lever 1 niapnnpno attach the carriage 12. made in the form of two running wheels, planted on a common axis 13 together with the deflecting unit 14. on which the rope branches are attached

15 of the cargo hoist 16. The working surfaces of the traveling wheels of the carriage 12 are made in the form of circular capes and cylindrical rims.

FDI I pvsoBoii carts 8 pa medium; a) buildings I (slal. position1) running.: o., ieea, their II channel channels Aere: Eu1ayutsya unloading rope, 6. At the same time iodine pressure; This side of the car 12 or the weight of the supported load in the unloading cables G generates tensions that, compressing the span structure 1 at the level of its lower side, cause it to bend upwards, which compensates for its deflection from the side of the trolley 8.

On the crane consoles (see position II in Fig. 1), the running wheels of the carriage 2 move with their cylindrical parts but with an additional gear 4, which results in relieving the load from the relief ropes and reducing the bending of the consoles.

PREPARATION AND RESULTS

Gantry crane containing a console span mounted on the onori

and a load trolley movable along it with a hoisting hoist, characterized in that, in order to reduce the weight of the crane with a nugget of unloading the span from the cross bend, 011 is made with a carriage connected to the load trolley but not moving at least one discharge cable attached to the ends of the cantilevers, and receiving the load from the hoisting hoist, and along the cantilevers additional maneuvers are provided that are equipped with transitional inclined sections on the supports to support the unloading rope laid along additional guides when moving to them carriages.

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