JPS5943389B2 - Marine gantry crane - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a marine gantry crane that allows bulldozer loading work to be carried out well and improves the stability of a ship by lowering the center of gravity of the crane.

As shown in FIG. 1, a conventional bulk conversion service vessel 1 is equipped with a mobile marine gantry crane 2.

That is, this marine gantry crane 2 consists of a pair of legs 4, 4 equipped with wheels 3°3 and a girder 5 stretched between the legs 4, 4, and is laid on the hull of a bulk conversion service vessel 1. The vehicle is configured to be able to travel on two parallel rails 6.6 by a drive source (not shown) such as a motor.

A movable trolley 7 is installed on the girder 5, and a club packet 10, which is housed in a ship 8 and is used for cargo handling in a bulk changing direction 9, is suspended from the trolley 7 by a wire rope 11. It's hanging.

Reference numeral 12 denotes a bulldozer that sweeps the bulk converter 9 into one place when the bulk converter 9 is running low, in order to increase the amount of grab buckets 10 and increase cargo handling efficiency. The trolley 1 is carried into the grab bucket 10 by suspending it from the grab bucket 10 using a wire rope 13 and running the trolley 1.

Therefore, it is necessary to suspend the bulldozer 12 at a higher position than the hopper 15 fixed to the legs 4 and set the distance H between the club packet 10 and the hopper 15 to be sufficiently large to avoid interference between the two.

However, in such a configuration, the legs 4, 4 inevitably become long, which not only increases the overall weight of the marine gantry crane 2, but also impairs the visibility from the bridge (and worsens the stability of the diversion service vessel 10). There was a big drawback.

The present invention has been made in order to eliminate the above-mentioned drawbacks, and includes a cantilever protruding outward from the side of the ship on the = side of the girder, which is foldably connected, and a hoisting device is disposed at the tip of the cantilever. By folding the cantilever into the hull to load the bulldozer suspended by the
To provide a ship side gantry crane which avoids interference with a hopper and improves ship stability by shortening the length of the legs.

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

FIG. 2 is a front view showing the marine gantry crane according to the present invention in a bulldozer loading state, and FIG. 3 is a plan view.

Components in the drawings denoted by the same reference numerals as in FIG. 1 indicate the same members, and their explanations will be omitted.

In these figures, cantilevers 16a to 16a are installed at both ends of a pair of girders 5A and 5B that constitute the marine gantry crane 2.
One end of the bulldozer 16d is connected via a hinge 17 so that it can be folded, that is, rotated horizontally around the hinge, and its tip is extended outside the ship when the bulldozer 12 is suspended, and when carried in. As shown by the chain lines, it is folded to the outside of the girders 5A and 5B.

Hoisting devices 18a to 18d such as winches are disposed at the tips of the cantilevers 16a to 16d, respectively, and
The bulldozer 12 is suspended by these hoisting devices 18a to 18d.

Incidentally, the hopper 15 is arranged between the girders 5A and 5B of the gantry crane 2, as shown in FIG.

That is, in the present invention, after the bulldozer 12 carried to the quay 14 is suspended by the hoisting device 18a, the cantilever 16a is rotated horizontally and folded into the hull along the outer surface of the gantry crane 2. After that, the bulldozer 12 is moved into the hopper 1.
It is possible to load the bulk materials onto the bulk converting service vessel 1 without passing above the vessel 5, thereby preventing interference between the two.

Therefore, the marine gantry crane 2 has a grab bucket 1.
0 closer to the top of the hopper 15, its height can be lowered by a distance H compared to the conventional one shown in FIG.

As explained above, according to the marine gantry crane according to the present invention, a hopper is arranged on the inner side of the girder leg of the gantry crane, and a foldable cantilever is connected to the end of the girder along the outer side of the crane. - At the same time, a hoisting device for suspending the bulldozer is installed on this cantilever, and the structure is such that the bulldozer can be loaded into the ship without going over the hopper by folding the cantilever, so that the bulldozer is placed between the grab bucket and the hopper. There is no longer a need to ensure sufficient space for hanging the objects.

Therefore, the legs of the marine gantry crane can be shortened by the above-mentioned distance, thereby lowering the overall height and lowering the center of gravity due to the weight reduction, improving the stability of the ship and increasing the distance from the bridge. Its effects are very good for dogs, such as improving the visibility of dogs.

[Brief explanation of the drawing]

FIG. 1 is a front view of a conventional marine gantry crane when loaded with a bulldozer, FIG. 2 is a front view of a marine gantry crane according to the present invention when loaded with a bulldozer,
FIG. 3 is a plan view. 1... Bulk conversion service vessel, 2... Marine gantry crane, 5... Girder, 12... Bulldozer, 16a-16d...・Cantilever,
18a to 18d...Hoisting device.

Claims (1)

[Claims] 1. A hopper is arranged on the inner side of the girder leg of a gantry crane that is movably installed on the ship's hull, and a cantilever is provided at the end of the girder of the gantry crane that extends outward from the ship and is folded along the outer side of the girder. A marine gantry crane, characterized in that the bulldozer is foldably connected to the cantilever, the bulldozer is suspended by a hoisting device installed on the cantilever, and the bulldozer is loaded into the hull by the folding operation of the lever.