JPH10101292A - Deck crane for stevedoring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce installing diameter and lighten weight of a crane body by making a lower post a cylindrical shape that its diameter is less than width of a ship container and making a rotary post cylindrical shape or substantial conical that diameter of its bottom part is width of the ship container or more. SOLUTION: A deck crane 1 has a lower post 2 and a substantially conical rotary post which can turn on a parallel surface mounted on it and the rotary post 3 is turnable around a rotary shaft line by the rotary bearing mounted in its lower part. The rotary post 3 is actuated by a rotary post drive mechanism. An operational room 5, a maintenance door 6 for maintaining and checking devices stored in its inner part, a ventilator 7 for changing air in post inside and an emergency steps are mounted in a side part of the rotary post 3. The rotary post further mounts a jib and its one end is supported for turning upward by two supporting parts 10 mounted in lower end of the rotary post 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a cargo ship for loading and unloading cargo on a cargo ship such as a container ship.
It relates to deck cranes installed on ships.

[0002]

2. Description of the Related Art At present, various types of cargo ships such as container ships are frequently used in marine transportation of various types of cargo. Such cargo ships are equipped with deck cranes on deck for loading and unloading cargo.

A conventional deck crane includes a cylindrical lower post fixed to a hull, and a rotatable post pivotable about a vertical axis provided with a jib on the lower post for cargo handling work. Rotating posts are typically polygonal pyramids (eg, 8
(Pyramidal) shape.

A drive mechanism for rotating the rotary post, a winch for performing the raising and lowering operation of the jib, a winch for raising and lowering a hook suspended from the free end of the jib by a wire, and controlling the same are provided in the rotary post. And the like are accommodated.

[0005] However, the conventional deck crane has been increased in size to accommodate the drive mechanism and the like as described above,
Therefore, a large installation area is required. Therefore, there is a problem that the area in the hold where cargo can be loaded becomes narrower and obstructs the operator from seeing the outside from the cockpit of the ship.

For this reason, deck cranes having cylindrical or substantially conical posts, which require a relatively small installation area, have been produced, especially for container ships. This type of deck crane has a fixed post and a rotating post that are both smaller than the width of a marine container (8 feet ISO, approximately 2.4 m), which allows for a larger cargo area. In addition, the outlook from the cockpit of the ship to the outside is improved.

However, in the case of this type of deck crane, since the diameter of the post is reduced, it is necessary to increase the thickness of the structural material of the post in order to obtain sufficient rigidity.
For this reason, the internal space becomes narrower as the weight of the crane body increases, and it becomes difficult to store a winch or the like inside the post.

[0008]

DISCLOSURE OF THE INVENTION The present invention does not require a large installation area in a deck crane for ship handling,
Therefore, the present invention relates to a deck crane that enables a wide cargo loading area and improves visibility from the cockpit to the outside.

[0009]

According to the present invention, there is provided a deck crane comprising: a vertical lower post fixed to a hull; a rotary post provided on the lower post so as to be pivotable about a vertical axis; At the lower end side of the jib, a jib whose base end is supported so as to be able to descend, a first winch for raising and lowering the jib by feeding and winding up a wire for raising the jib, and hanging from a free end of the jib The second winch that raises and lowers the hook by raising and lowering the wire for hook lifting and lowering, a rotary post drive mechanism that rotates the rotary post about the vertical axis, the first winch, the second winch A hydraulic device for driving a winch and a rotary post driving mechanism; and a control device for controlling the hydraulic device, wherein the lower post has a diameter. The width less cylindrical marine container and the rotating post, the diameter of its bottom, characterized in that a cylindrical or substantially conical width or more marine container.

[0010] The deck crane of the present invention can be reduced in size as compared with the conventional polygonal pyramid post deck crane by using a rotary post having a cylindrical shape or a substantially conical shape. This means that the cargo loading area is increased and the outlook from the cockpit is improved.

The lower post has a cylindrical shape whose diameter is equal to or less than the width of the marine container, and the rotating post has a cylindrical shape or a substantially conical shape whose bottom has a diameter equal to or greater than the width of the marine container. By doing so, it becomes possible to house devices such as winches and the like while maintaining sufficient rigidity as compared to a conventional deck crane having a cylindrical or substantially conical post, and to reduce the weight. Can also be planned.

Further, the deck crane according to the present invention is
The rotary post driving mechanism, the first winch, the second winch, a hydraulic mechanism, and a control device may be housed inside the rotary post.

[0013] In the deck crane according to the present invention, at least one of the first and second winches has a hollow hoist drum, a drive mechanism for driving the hoist drum, and the winch driven by the drive mechanism. A planetary gear mechanism, wherein the planetary gear mechanism is housed inside the hoisting drum, and the hoisting drum is driven by the driving mechanism via the planetary gear mechanism.

As a result, it is possible to reduce the size of the winch, so that the winch can be housed in the rotating post despite the fact that the inner housing is narrower than the conventional polygonal pyramid post deck crane. It is possible to do.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show the appearance of a deck crane according to the present invention. The deck crane 1 shown in the figure includes a lower post 2 and a substantially conical rotating post 3 that is provided on the lower post 2 and is rotatable in a horizontal plane. The bearing can be turned around the rotation axis of the bearing. The rotation post 3 is operated by a rotation post driving mechanism described later. An operator cab 5, a maintenance door 6 for maintenance and inspection of equipment housed inside, a ventilator 7 for ventilation of the inside of the post, and an emergency ladder 8 are provided on the side of the rotating post 3.

The rotating post 3 is further provided with a jib 9, and one end of the jib 9 is supported by two supporting portions 10 provided at the lower end of the rotating post so as to be able to descend. A hook 11 for loading and unloading cargo is suspended from the other end of the jib 9 so as to be able to move up and down. The jib 9 is raised by unwinding or winding a wire 16 through a set of pulleys 12 provided on the top of the rotating post 3 and a set of pulleys 14 provided on the tip of the jib 9 by a jib raising winch described later. Done. The lifting and lowering of the hook 11 is performed by feeding or winding the wire 17 through a set of pulleys 13 provided at the top of the rotating post 3 and a set of pulleys 15 provided at the tip of the jib 9 by a hook hoisting winch described later. Done by

FIGS. 3 and 4 are sectional views of the lower post 2 and the rotating post 3 of the deck crane 1 according to the present invention. As shown in FIG.
The rotation post 3 is capable of pivoting around its rotation axis by means of a rotation shaft 19 provided at the center of the pedestal 18. Inside, a hydraulic pump unit 23 for hydraulically driving the jib elevating winch 20, the hook hoisting winch 21 and the rotary post drive mechanism 22, respectively.
It is equipped with an oil tank 24, a control panel 25 provided with electric equipment for controlling the deck crane, and a ladder 26 for entering and exiting the operator's seat and for maintenance and inspection of the equipment. An elevator 27 is provided for the entry and exit of workers. Further, the wire 17 and the hook winding winch 21 are provided with a slack over 28 and a push roller 29 for preventing the wire from being loosened. One or two rotary post drive mechanisms 22 are provided according to the maximum load of the crane.

Inside the lower post 2, there are provided a slip ring 30 for supporting the rotating shaft 19 of the rotating post 3, and a ladder 31 for entering and exiting a driver's seat and for maintenance and inspection of equipment.

FIG. 5 is a diagram showing a jib raising winch 20 and a hook hoisting winch 21 used in the deck crane according to the present invention. The jib elevating winch 20 and the hook hoisting winch 21 are both supported side by side by a support frame 32 and a drum bearing 33 serving also as a support frame. Winches 20 and 21 are hydraulic motors 3 for driving
4, 39, planetary gear reducers 35, 40, hollow drums 36, 41,
It comprises bearings 37, 42 and brakes 38, 43 respectively. Further, as shown in the drawing, each winch is configured to house planetary gear reducers 35 and 40 as reduction mechanisms in drums 36 and 41, respectively, and drive these drums from the inside. By adopting such a configuration, the winch is reduced in size and can be accommodated inside the rotating post 3.

FIG. 6 is a diagram schematically showing the mechanism of the planetary gear reducer 35. As shown in FIG. The planetary gear reducer 35 rotatably supports the input shaft 44, the first sun gear 45, the second sun gear 46, the first planetary gear 47, the second planetary gear 48, and the first planetary gear 47. A first carrier 49, a second carrier 50 rotatably supporting a second planetary gear 48, and a rotating body 53 having a first internal gear 51 and a second internal gear 52 on the inner surface. Here, the second sun gear 46 is integrated with the first carrier 49. The second carrier 50 is fixed to a support 32 (not shown). In addition, as this speed reducer, a normal planetary gear speed reducer can be used.

The deck crane according to the present invention requires, for example, a deck crane having a maximum load of 30 tons and an installation area of about 60% as compared with a conventional polygonal pyramid crane.
In addition, the weight of the crane body can be reduced by about 10 to 20% compared to the conventional deck crane. Therefore, the installation area is smaller than before and the reduced crane weight can be used for loading cargo.

[0023]

In the deck crane according to the present invention, the post is formed in a cylindrical or substantially conical shape, and the equipment for operation is reduced in size so as to be accommodated in the post. Therefore, as compared with the conventional deck crane, the installation area is small and the weight of the crane body can be reduced. Therefore, it is possible to increase the loading area of the cargo on the ship, and it is possible to increase the transport amount.

Furthermore, by reducing the diameter of the post, the visibility from the cockpit of the ship to the outside is improved, which contributes to the safety of navigation.

[Brief description of the drawings]

FIG. 1 is a front view showing the appearance of a deck crane according to the present invention.

FIG. 2 is a plan view showing the appearance of the deck crane according to the present invention.

FIG. 3 is a sectional view of a post of the deck crane according to the present invention.

4 is a cross-sectional view of the deck crane shown in FIG. 3, taken along line AA.

FIG. 5 is a view showing a winch used for the deck crane according to the present invention.

FIG. 6 is a schematic view of a mechanism of the winch planetary gear reducer shown in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Deck crane 2 Lower post 3 Rotating post 4 Rotating bearing 5 Operator's cab 6 Maintenance door 7 Ventilator 8 Emergency ladder 9 Jib 10 Jib support 11 Hook 12, 13, 14, 15 Pulley 16, 17 Wire 18 Pedestal 19 Rotating post Rotary axis 20 Jib elevating winch 21 Hook hoisting winch 22 Rotary post drive mechanism 23 Hydraulic pump unit 24 Oil tank 25 Control panel 26, 31 Ladder 27 Elevator opening 28 Slack over 29 Push roller 30 Slip ring 32 Winch support 33 Drum bearing 34, 39 Hydraulic motor 35, 40 Planetary gear reducer 36, 41 Drum 37, 42 Bearing 38, 43 Brake 44 Input shaft 45, 46 Sun gear 47, 48 Planetary gear 49, 50 Carrier 51, 52 Internal gear 53 Rotating body 54 Thrust washer 55, 56, 57 Bearing

Claims (4)

[Claims] 1. A vertical lower post fixed to a hull, a rotary post provided on the lower post so as to be pivotable about a vertical axis, and a lower end side portion of the rotary post so that it can be raised. A jib whose base end is supported at a base end; a first winch for raising and lowering the jib by feeding and winding the wire for raising and lowering the jib; and a hook for hanging up and down from a free end of the jib. And a second winch to be raised and lowered by winding, a rotary post drive mechanism for rotating the rotary post about the vertical axis, and a drive for driving the first winch, the second winch and the rotary post drive mechanism. A hydraulic device, and a control device for controlling the hydraulic device, wherein the lower post has a cylindrical shape whose diameter is equal to or less than the width of the marine container. The rotating post, wherein the diameter of the bottom is wider than the cylindrical or substantially conical marine container, deck crane ship handling. 2. The deck crane according to claim 1, wherein the rotary post drive mechanism, the first winch, the second winch, a hydraulic mechanism, and a control device are housed inside the rotary post. Deck crane for ship handling. 3. The deck crane according to claim 1, wherein at least one of the first and second winches includes a hollow hoist drum, a drive mechanism that drives the hoist drum, and the drive mechanism. A planetary gear mechanism for driving the winch, and accommodating the planetary gear mechanism inside the hoisting drum,
A deck crane for ship handling, wherein the hoist drum is driven by the drive mechanism via the planetary gear mechanism. 4. A vertical lower post fixed to a hull, a rotary post provided on the lower post so as to be pivotable about a vertical axis, and a lower end side of the rotary post so as to be able to descend. A jib whose base end is supported at a base end; a first winch for raising and lowering the jib by feeding and winding the wire for raising and lowering the jib; and a hook for hanging up and down from a free end of the jib. And a second winch to be moved up and down by winding, a rotary post drive mechanism for rotating the rotary post about the vertical axis, and a drive mechanism for driving the first winch, the second winch and the rotary post drive mechanism. A deck crane comprising: a hydraulic device; and a control device for controlling the hydraulic device, wherein the lower post has a diameter of a ship container. The following post, and the rotating post has a cylindrical shape or a substantially conical shape whose bottom diameter is equal to or larger than the width of the marine container; the rotating post drive mechanism, the first winch, the second winch A hydraulic mechanism and a control device are housed inside the rotary post, and at least one of the first and second winches has a hollow hoist drum, a drive mechanism for driving the hoist drum, and the drive mechanism A planetary gear mechanism for driving a winch, the planetary gear mechanism being housed inside the hoisting drum,
A deck crane for ship handling, wherein the hoist drum is driven by the drive mechanism via the planetary gear mechanism.