FI76050C - Linlyftanordning - Google Patents

Description

76050

ROPE LIFTING - LINLYFTANORDNING

The present invention relates to a rope lifting device comprising a frame, a cantilever, a fixed or separate lifting mechanism and a loading member connected to the lifting mechanism by means of ropes passing through the folding wheels of the device, and a cantilever with it, the loading member moves fixedly, whereby in the outer extreme position of the lifting carriage the loading member is outside the end of the cantilever beam.

Lifting devices of this type can be used, for example, for loading and unloading ships. One such device is disclosed in U.S. Patent 3,063,572. It has a sliding cantilever that can be driven to either side of the ship. The lifting gear is attached to a counterweight carriage running in the beam. The lifting device disclosed in said patent, as well as such lifting devices in general, has the disadvantage that the operating range of the loading member is limited to the length and mobility of the beam. If a lifting device with a larger reach is desired, the beam must have been built relatively long, which means that the structure is very space-consuming and unsuitable for turning in tight spaces. Thus, it has not been possible to lift loads from outside the cantilever beam so far.

A known lifting device is disclosed in SE publication 347941, in which the lifting device comprises a movable lifting carriage or beam and a separately movable cantilever part and a rope carriage. With such a structure, the deflection pulley in the cantilever should always be outside the carriage's pulley, so that the radius of the pivoting structure is large. NO-Kuulutus 146272 discloses a platform crane with lifting and moving parts in a trolley. However, the support principle of the wagon is functional and has been used to some extent also in the solution according to our invention.

It is an object of the present invention to provide a rope hoist which does not have the above-mentioned drawbacks. The invention is thus characterized in that, when the lifting carriage is in its retracted extreme position, the loading member is between the end of the cantilever beam and the body of the rope lifting device.

By means of the invention, the dimension of the loading member is considerably improved.

Because the rope pulleys for rope lifting are positioned in a new way and there are no bending points outside the movement of the carriage part, a smaller turning radius is achieved with the carriage located at a smaller reach on the fixed cantilever and the load remains at the same height regardless of the carriage position. The lifting mechanism is located close to the turning center, which makes it easy to maintain and protect, and the mass forces of the turning movement caused by the machine are small.

An advantage of the invention is that the cantilever beam can be made shorter, whereby its turning radius is smaller than the reach of the lifting device would require. Another advantage is that there is no need to take electricity to the lift truck.

In the following, the invention will be explained in detail by way of example with reference to the accompanying drawings, in which

Fig. 1 shows a side view of a rope lifting device according to the invention.

Fig. 2 shows a top view of a rope lifting device according to the invention.

Fig. 3 shows a rope diagram of a rope lifting device according to the invention.

As fig. 1, the rope hoisting device according to the invention comprises a fixed frame 13 to which a cantilever beam 3 rotating relative to the vertical axis of the cage is attached. A lifting mechanism 4 is arranged close to the pivot center of the cantilever beam. The hoisting trolley has a loading member 9 suspended by several hoist wheels ♦ 11 3 76050 and hoisting ropes 5, which moves with the hoisting trolley.

Figure 3 shows a rope diagram according to the invention. Accordingly, the hoisting ropes 5 pass from the hoisting mechanism 4 through the deflection wheels 6 at the tip of the cantilever 3 to the deflection pulleys 7 at the rear of the hoisting carriage 1. side.

The number of hoisting ropes may vary according to the intended use and a hook or other gripping member may be placed in place of the loading member.

The tilting mechanism 12 of the loading member 9 can be arranged in the fixed part, by means of which the loading front 9 can be tilted in two directions regardless of the position of the lifting carriage 1.

It will be clear to a person skilled in the art that the invention is not limited to the above-mentioned exemplary embodiment, but can be modified within the scope of the appended claim. Thus, the lifting carriage can be moved in any known manner, for example by a hydraulic cylinder, as shown in the figures. One embodiment of the invention is the possibility of constructing a fixed projection and a second carriage system on the opposite side of the pivot center.

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Claims (1)

76050 CLAIMS A rope lifting device comprising a frame (13), a cantilever beam (3), a fixed or separate lifting mechanism (4) and a loading member (9) connected to the lifting mechanism by means of ropes (5) passing through the folding wheels of the device, and to which the cantilever is connected to a lifting carriage (1) movable relative to the cantilever beam between the inner and outer positions, with which the loading member (9) moves fixedly, the loading member (9) being outside the end of the cantilever beam (3) in the outer extreme position, characterized in in its retracted extreme position, the loading member (9) is between the end of the cantilever beam and the body (13) of the rope hoist.