SU1388382A1 - Tower crane - Google Patents

Abstract

The invention relates to the field of lifting and transport machinery, namely, tower cranes. The purpose of the invention is to expand the service area and increase the convenience of operation during the reconstruction of multi-span buildings. The crane contains a tower 1, a swivel boom 5, which is extended from separate standard sections, a cargo trolley 19 and vertical A-shaped posts 15 of variable length, moving along the boom by means of the boom treads, one end of which is attached to an additional winch 22.7 Il. Yu

Description

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FIELD OF THE INVENTION The invention relates to lifting and transport machinery, namely, tower cranes.

The purpose of the invention is to expand the service area and increase the convenience of operation during the reconstruction of multi-span buildings.

In Fig.1 schematically shows a crane, a general view; figure 2 is a view of And figure 1; FIG. 3 is a scheme for storing a cable block drive mechanism of a truck's hoist and an emphasis for boom movement, the initial position, the cargo carriage is secured at the holder; Fig. 4 is a schematic diagram of the stockpiling of the cargo-carriage mechanism of a cargo trolley, the position of movement of the cargo trolley; Fig. 3 shows the scheme of storing the cable-block mechanism for lifting and lowering the load; Fig. 6 is a diagram of a storing mechanism for raising and lowering boom sections when it is lengthened or removed; Fig. 7 is a schematic diagram of a storing mechanism for lifting supports, adjusting the height of construction sites and moving them along the boom.

The crane contains a tower 1 with a chassis 2, a rotary device 3 in the form of a support ring mounted on the tower 1. On the rotary device 3, a holder 4 is mounted and mechanisms for extending the boom 5 with a winch 6 (FIG. 3) and lifting ( lowering) sections 7 (Fig. 6) for lengthening and dismounting the boom 5. In the lower opening of the yoke 4 a cargo platform 8 is installed for raising and lowering sections 7 when lengthening and dismounting the boom 5 associated with the corresponding; by means of a cable block mechanism with a winch 9 (FIG. 6), the ma that 10 with cables 11 for balancing the yoke 4 with the counterweight 12 mounted on the side opposite to the boom 5 5 and the post 13 with the tension 14 connected with the pulley blocks (fig. 7) with the 15 A-shaped struts with height adjustable supports 16 mounted on the boom 5 with the ability to move along it, on the other hand, with a multi-drum boom winch 17. The struts 15 have latches 18. On the boom 5 there is a loading trolley 19 connected to the winch 9 of the cable block mechanism (Fig. 3) and winch 6 body travel ki (fig.3,4). On the trolley 19, the stops 20 are in contact with when working with

poles 13. The drawing also shows a span 21, a winch 22 for raising the boom 3 and grippers 23 for holding the supports 16 in a raised position.

0 Lifting crane works as follows.

The crane is installed at the edge of the facade or side of a multi-span building 21. The boom 3 is increased (extended) by separate sections 7, starting with the front section, on which the trolley 19 is mounted with the load, and the pillars 13 with supports 16 raised by means of

0 of the loading platform 8 into the yoke 4, where they are connected in series with the previously raised sections and shifted with the help of a cable block mechanism with a winch (Fig. 4) to the required

5 arrow lengths. In this case, the supports 16 of the uprights 13 are in a raised position by a cable block mechanism with a winch (Fig. 7), the latches 18 are pressed out and the supports 16 are locked by the catches 23. Then

0 the crane with the boom assembled to the required length is installed on the workplace, the posts 13 move along the boom 3 with the help of the trolley 19 (with its stops 20) to the place of their bearing

5, the structure 21 or other base, the supports 16 of the uprights 13 are lowered by the said mechanism until they are supported and fixed by the latches 18, after which the crane is considered prepared for

0 cargo operations. The seizure of cargo using the trolley 19 is carried out in the conventional manner of the sequence.

To increase the length of the boom, the cable carriage mechanism for loading the trolley 19 (Fig. 3) is used, the trolley is installed with a stop in the crane cage, to reduce the boom length or extend in the opposite direction (Fig.4) the trolley is fixed at the boom at a distance sufficient to push part of the boom into the cage up to the stop of the cart and the lifting mechanism (Fig. 6 for lifting boom sections).,

The trolley 19 at the time of the boom extension operations 3 is locked in a known manner by abutting the cage.

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EchH, if it is necessary to change the installation location of the crane by moving along the track, its stability is disturbed due to the excessive length of the boom, the latter can be pushed through the yoke in the opposite direction with the help of a winch of a cargo trolley fixed on it.

The cargo crane can be used as a tower crane with an easy changeover by reducing the length of the boom 5 by removing the required number of sections 7., while maintaining the stability of the crane due to the counterweight 12 and removing the supports 16 from the boom.

Claims (1)

Claim 20 A tower crane, comprising a rotary boom mounted on a trolley with a tip, mounted on it with a tip, mounted on it with the possibility of moving a cargo trolley with a cable-block mechanism and a vertical A-shaped stand of variable length, and cargo and jib winches, characterized in that, in order to expand the service area and improve ease of operation during the reconstruction of multi-span buildings, it is equipped with a horizontal yoke, inside which is placed an arrow, made with the possibility of extension by means of standard sections of at least one additional vertical A-shaped stand of variable length, with the web of said struts located above the upper catches of the boom, and each support of the pillars is pivotally connected to the jumper to be rotated in the vertical plane by pulling the boom passing through the stop which is mounted on the cage and attached to the ends respectively to the additional stand and the additional winch that is mounted on a . 23 20 Type A P id Phage.2 / 5 5 Fi9.3 Fish H 6 Fi9.7