JPS5820631Y2 - Retractable marine gantry crane - Google Patents

Description

[Detailed description of the invention] The present invention is a retractable marine gantry crane that can store the main components on the deck of the ship's hull during navigation, that is, when not in use, and that allows the gantry crane to be easily assembled on the ship's hull during cargo handling operations. Regarding.

Compared to ships intended for ocean navigation, ships operating on rivers are often subject to stricter restrictions on ship width and height in order to ensure smooth operation of ships operating on rivers.

Therefore, there are currently no examples of ships with large cargo handling capacity, cargo hoisting heights, and cargo handling equipment such as large outreach lanes operating on rivers, and most of them pass under river bridges. There is still no practical example in which the height of cargo handling equipment such as a crane installed on a ship can be lowered by some means in consideration of the case where the cargo handling equipment is used.

In view of the actual situation in the industry, the present invention lowers the height of the main components of cargo handling equipment by storing them on the deck of the ship's hull during normal navigation. In addition to lowering the center of gravity of the entire ship, it also reduces the inertia caused by the shaking of the ship, improving the ship's stability during navigation. This was proposed for the purpose of providing a marine gantry crane that can be easily assembled as a gantry crane on the ship's hull. A pair of running trolleys 1, 1,
On the pair of traveling carts 1゜1, a pair of raising/lowering legs 3, 3, whose lower ends are respectively attached so as to be able to stand up or fall down;
When the pair of raising and lowering legs 3, 3 stand up, those raising and lowering legs 3
, 3, a crane girder 5 whose both ends are connected by a connecting means to maintain the erection position, supports the crane girder 5 using the upper ends of the pair of upright legs 3, 3 as a fulcrum, and supports the crane girder 5. Lifting means for the crane girder 5 consists of a pulley disposed at an appropriate position on the side of the girder 5 and a wire rope 9 that is passed through a hook 7a of a swinging crane 7 on the crane girder 5 and is hoisted or unwound by the swinging crane 7. A pair of running members running on parallel rails laid along a retractable marine gantry crane, each having a lower end attached to the pair of running members so as to be able to stand up or fall down. A pair of raising/lowering legs, a crane girder whose upper ends are connected by connecting means to maintain the erection position when the pair of raising/lowering legs are erected, and a crane girder whose upper ends of the pair of standing legs are used as a fixed fulcrum. A retractable marine gantry crane, characterized in that the crane girder is supported by a crane on the crane girder, and is equipped with an elevating means consisting of a pulley and elevating cable for elevating between the erection position and the hull deck level. It is.

The present invention will be specifically explained below with reference to embodiments shown in FIGS. 1 to 3.

In those figures, 1 and 1 are a pair of running bogies that run on parallel rails laid along the longitudinal direction on decks near both sides of the hull S, and 2゜2 is the running bogie IK.
The lower part of the front and back of the traveling frame is supported, and the same traveling frame 2, 2
The traveling carriage 1.1 forms a pair of traveling members that travel on the parallel rails.

Reference numerals 3 and 3 denote a pair of raising and lowering legs that are respectively connected to the traveling frame 2 of the pair of traveling members so as to be able to stand up or fall down, and these raising and lowering legs 3 and 3 are in the upright state shown by the solid line in FIG. , as shown by the dashed line, the traveling frame 2 can be laid down horizontally in opposite directions along the front-back direction of the traveling frame 2, that is, the direction in which the parallel rails are laid.

Reference numeral 4 denotes a connecting bracket protruding from the inside of the upper end of the raising/lowering legs 3, 3. When the raising/lowering legs 3, 3 are raised, both ends of a crane girder 5, which will be described later, are connected to the bracket 4. Both ends of a crane girder 5 are installed between the upper ends of the tilting legs 3.3, and the crane girder 5 and the raising legs 3, 3 form a gantry crane on the hull.

A well-known traverser 6 having a swing crane 7 is mounted on the crane girder 5 so as to be movable along its longitudinal direction.

Reference numerals 8 and 8 denote a pair of drums installed at the top of each of the pair of raising/lowering legs 3, 3, with both ends of a wire rope 9 fixed and wrapped around it for a certain length; A pulley (
Sheave) 10, 11, 12゜13 and swing crane 7
The hook 7a forms a fulcrum for the wire rope 9 of the crane girder's lifting means, which is made up of a wire rope 9 and the like.

In addition, 14 (Fig. 3) is a member to prevent the traveling frame 2 and the raising/lowering leg 3 from falling, and the member 14 is located between the front and rear of the traveling frame 2 and the deck at a predetermined position on the ship where the crane girder is raised and lowered. The crane girder 5 is configured to be obliquely attachable and detachable, and the traveling frame 2 and the tilting legs 3 are supported by the falling prevention member 14 while both ends of the crane girder 5 are removed from the connecting bracket 4. There is.

An embodiment of the retractable marine gantry crane of the present invention is as follows:
The crane is constructed as described above, and in order to form a gantry crane by erecting a pair of left and right raising/lowering legs 3, 3 and erecting a crane girder between the upper ends thereof for cargo handling work, first, , the tilting legs 3, 3 are laid down horizontally with respect to the traveling frame 2 by the swinging crane 7 of the traverser 6 on the crane girder 5 which is mounted and fixed on the deck.
After raising the crane girder 5 and the deck, the drum 8 and pulley 10°11.1
2.13 and the wire rope 9 stretched over these are hooked with the hook 7a of the swing crane 7 as shown in FIG. 3, and the wire rope 9 is hoisted up by the swing crane I.

Then, the crane girder 5 including the swinging crane I rises while maintaining its horizontal state.

When both ends of the crane girder 5 reach between the upper ends of the pair of left and right vertical legs 3, 3, the operation of the swing crane 7 is stopped, and both ends of the crane girder 5 are moved between the vertical legs 3, 3. A gantry crane is formed by connecting the crane girder 5 to a 3°3 connecting platen 4 and installing the crane girder 5 between a pair of left and right raising/lowering legs 3, 3.

Next, when storing the gantry crane assembled in the above manner on the deck to lower its height, first place the crane girder 5 including the swing crane 7 in the is lowered onto the deck, and then the raising/lowering legs 3, 3 are lowered.

Since the retractable marine gantry crane of the present invention has the above-described configuration and function, according to the present invention, (1) During navigation, the main components of the crane are Since it can be stored in a low position on a deck, navigation on rivers and under bridges is easy, and the center of gravity of the entire ship can be lowered during navigation, and the inertia caused by the movement of the ship can be reduced. Therefore, the ship can always navigate in a stable state.

(2) The crane girder is raised and lowered using the drive source of the swing crane 7, and no special drive device is required, so the equipment cost is relatively low.

The following practical effects can be mentioned.

[Brief explanation of drawings]

The drawings are schematic illustrations of an embodiment of the present invention, in which FIG. 1 is a front view, FIG. 2 is a side view, and FIG. 3 is a front view of the initial stage of assembly of the gantry crane. 1: Traveling trolley, 2: Traveling frame, 3: Raising legs, 5: Crane girder, 6: Traverser, T: Swivel crane, 8 Ni drum (fixed fulcrum) 9: Wire rope, 10.11, 12,
13: Pulley.

Claims (1)

[Scope of utility model registration request] A pair of running bogies 1, 1 run on parallel rails laid along the longitudinal direction on the deck near both sides of the ship, and a lower end is installed on the pair of running bogies 1゜1 so that it can stand up or fall down A pair of raising/lowering legs 3, 3 to which parts are respectively attached, and when the pair of raising/lowering legs 3, 3 are erected, both ends are connected by a connecting means between the upper ends of the raising/lowering legs 3, 3, and are erected. The crane girder 5 maintains its position, supports the crane girder 5 using the upper ends of the pair of upright legs 3, 3 as a fulcrum, and also supports the crane girder 5 by using the upper ends of the pair of upright legs 3, 3 as a fulcrum, and the pulleys arranged at appropriate positions on the sides of the crane girder 5 and the crane girder 5 on the crane girder 5. The revolving crane 70 hook 7aK hook is passed and hoisted by the revolving crane 7! A retractable marine gantry crane characterized in that it is equipped with means for lifting and lowering a crane girder 5 made of a wire rope 9 that can be rewound or unwound.