JPH1121071A - Container crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve cargo handling efficiency of a crane by making the movement of a traverser in high speed. SOLUTION: In a container crane 1 provided with a sea side trolley 5 to be moved on a crane girder 2, a land side trolley 7, and a traverser 11, the movement of the traverser 11 is performed by a traverser moving means 29 constituted of a pair of reaction plates 13 for constituting a secondary side of an induction linear motor laid on the lower surface of the crane girder 2 across the total length of the traverse range of the traverser, and a pair of coils 14 for constituting a primary side of the induction linear motor arranged on the traverser 11 so as to face the reaction plates 13. In starting and stopping of the movement of the traverser 11, the movement is performed by a traverser accelerating and decelerating means constituted of a pair of coils 15 for constituting the primary side of a synchronous linear motor arranged on the traverser 11, and a pair of permanent magnet 16 arranged on both trolleys 5, 7 and for constituting the secondary side of the synchronous linear motor besides the traverser moving means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container crane, and more particularly to a container crane installed on a quay such as a container pier.
The present invention relates to a container crane for loading and unloading containers on a container ship.

[0002]

2. Description of the Related Art A container crane is conventionally used as a cargo handling device installed on a quay such as a container wharf and loading and unloading containers with a berthing container ship. This container crane has a main trolley that moves a crane girder to shorten the cycle time (the time required for unloading and unloading one container) and increase the number of containers to be loaded, in order to increase the cargo handling efficiency, and this crane girder A second trolley-type container crane having an auxiliary trolley provided on the lower side of the auxiliary girder for moving an auxiliary girder provided in parallel with the crane girder and a container relay stand provided on a front leg below the auxiliary girder is used.

[0003] In recent years, container ships have become larger and larger,
The use of super-Panamax hull-shaped container vessels, which have a much larger width than conventional Panamax vessels, has led to the need for longer crane booms. The longer the boom, the longer the trolley travels.However, with a conventional second trolley type container crane, since the container relay is fixed, the distance between the container ship and the container relay and the ground equipment Even if the moving distance between containers becomes uneven, the cargo handling time between the container ship and the container relay station cannot catch up even if the cargo handling time between the container relay station and the ground equipment is shortened, and the work efficiency cannot be improved sufficiently There was a problem.

[0004] In order to solve these problems, the applicant of the present application filed a patent application for a container crane on December 25, 1995 (Japanese Patent Application No. 7-337211 (not disclosed)).

[0005] Fig. 5 is a front view of a container crane disclosed in Japanese Patent Application No. 7-337211, wherein a is a container crane and b is a crane girder. The crane girder b is provided with a first trolley c and a second trolley d so as to be movable, and has a container relay stand f between the first trolley c and the second trolley d; A movable traverser e for transferring the container n between the trolley c and the second trolley d is provided. A spreader k that moves up and down by a rope j is suspended from the first trolley c and the second trolley d. g is a cab that moves on the crane girder b. h is an elevated rail provided on the quay,
i is an unmanned trolley. m is a container ship.

When loading and unloading the container n by such a container crane, the first trolley c and the second
The trolley d stops at a position above each container n and concentrates on lifting and suspending the container n, and the traverser e traverses between them to transfer the container n.

[0007] The applicant of the present application also proposed a method of speeding up the movement of the trolley to improve cargo handling work efficiency.
On March 15, a patent application was filed for a trolley traverse device (Japanese Patent Application No. 8-304780 (not disclosed)).

FIG. 6 is a side view of a trolley traversing device disclosed in Japanese Patent Application No. 8-304780. Note that the same members as those shown in FIG. 5 are denoted by the same reference numerals, and redundant description will be omitted. In FIG. 6, the trolley u is
The wheels s move on rails r laid on the crane girder b. The trolley u is suspended by a spreader k that moves up and down by a rope j. Numeral o denotes a linear motor for moving the trolley u, which is disposed on a lower surface of the crane girder b over a reaction plate p laid over the entire length of the trolley u in a traversing range and on a bracket t below the trolley u. Coil q.

When the trolley u is moved by such a trolley traversing device, an alternating current is passed through the coil q on the trolley u side of the linear motor o to generate a traveling magnetic field moving in the traveling direction of the trolley u. The traveling magnetic field induces an eddy current in the reaction plate p on the crane girder b side to generate a thrust, thereby causing the trolley u to traverse the crane girder b.

[0010]

Problems to be Solved by the Invention Japanese Patent Application No. 7-33721
In the container crane disclosed in No. 1, the first trolley and the second trolley are stopped at positions above the respective containers to concentrate on lifting and hanging the containers, and the traverser moves between them to move the containers. They deliver and unload containers. In such a cargo handling method, there is a problem that the travel time of the traverser becomes longer as the size of the container ship increases, which makes it difficult to reduce the cycle time of the cargo handling. Japanese Patent Application No. 8-30478
In No. 0, the trolley is moved by a linear motor. Therefore, the traverser may be moved by a linear motor instead of the trolley. However, although the speed can be increased and the movement position can be accurately controlled, the cycle time cannot be reduced unless the traverser can be rapidly accelerated or decelerated. was there.

The present invention has been made to solve the above problems, and provides a container crane capable of reducing the cycle time by rapidly accelerating and decelerating the movement of a traverser and improving the efficiency of cargo handling work. It is intended to do so.

[0012]

In order to achieve the above object, according to the present invention, a sea-side trolley moving on a crane girder, a land-side trolley, and a traverser are provided. Containers are transferred between the trolley and the land side trolley, and the sea side trolley and the land side trolley lift the container with the spreader suspended on these trolleys and move the container between the container ship and the ground equipment. A container crane for loading and unloading containers, wherein the movement of the traverser is controlled by a pair of reaction plates constituting a secondary side of an inductive linear motor laid on the lower surface of the crane girder over the entire length of the traverser. And a pair of coils constituting the primary side of an inductive linear motor disposed on the traverser so as to face the reaction plate. When the traverser starts moving and stops, a pair of coils constituting the primary side of a synchronous linear motor provided in the traverser are provided when the traverser starts moving and when the traverser stops moving. A container crane is provided which is operated by a traverser acceleration / deceleration means comprising a pair of permanent magnets constituting a secondary side of a synchronous linear motor provided on a trolley.

According to a preferred embodiment of the present invention, the mounting positions of the coil and the reaction plate of the traverser moving means are upside down.

According to another preferred embodiment of the present invention, the positions of the coils of the traverser acceleration / deceleration means and the permanent magnets are reversed left and right.

According to the container crane constructed as described above, the traverser is moved by the inductive linear motor, and at the same time, when the traverser starts moving and stops, the traverser moves in addition to the inductive linear motor. Since the traverser can be rapidly accelerated and decelerated because the linear motor is also used, the cycle time can be shortened, and the efficiency of container handling can be further improved.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show an embodiment of the present invention. FIG. 1 is a front view of a container crane, FIG. 2 is a side view of the container crane, and shows a state in which a sea-side trolley and a traverser overlap each other. 3 is a front view of the traverser, and FIG. 4 is a front view of the seaside trolley.

1 to 4, reference numeral 1 denotes a container crane which travels on a traveling rail 24 laid along a quay 23 via wheels 1b provided below the leg 1a. Numeral 2 denotes a crane girder provided horizontally above the leg 1a of the container crane 1 so as to be orthogonal to the traveling rail. As shown in FIGS. 2 to 4, the main part of the crane girder 2 is constituted by two main girders 2a. Reference numeral 3 denotes a beam provided inside the main girder 2a along the main girder 2a, and a rail 4 is laid on the upper surface of the beam 3. Reference numeral 5 denotes a sea-side trolley (first trolley) that moves along the crane girder 2, and moves on the rail 4 of the beam 3 of the main girder 2a via wheels 6. Reference numeral 7 denotes a land side trolley (second trolley), which moves on the rail 4 of the beam 3 of the main girder 2a via wheels 8 similarly to the sea side trolley 5 (FIG. 3, FIG. 3).
(Fig. 4). On the sea-side trolley 5 and the land-side trolley 7, a spreader 19, which is a hanger for hanging a container 20, is provided to be able to move up and down while being supported by a head block 18 suspended by a rope 17 (FIGS. 1 and 2). ).

A traverser 11 moves along the crane girder 2 and is disposed between the sea-side trolley 5 and the land-side trolley 7 as shown in FIGS. It moves on a rail 10 laid on the upper surface of a beam 9 provided along the spar 2a via wheels 12.

Numeral 29 denotes a traverser moving means (inductive linear motor) which is laid on the lower surface of the crane girder 2 over the entire length of the traverser 11 as shown in FIGS. A pair of reaction plates 13 constituting the secondary side of the
The reaction plate 13 is provided on the upper surface of the overhang member 11a.
And a coil 14 which constitutes the primary side of an inductive linear motor provided so as to face.

Numeral 30 denotes a traverser acceleration / deceleration means (synchronous linear motor). As shown in FIG. 4, a coil 15 constituting the primary side of the synchronous linear motor disposed on the projecting member 11a of the traverser 11 is provided. And a pair of permanent magnets 16 constituting the secondary side of a synchronous linear motor provided outside the sea-side trolley 5 and the land-side trolley 7 so as to face the coil 15 respectively.

Reference numeral 21 denotes a container ship berthing on the quay 23, and reference numeral 22 denotes an unmanned trolley moving on the quay 23 (FIG. 1). Reference numeral 25 shown in FIG. 3 and FIG. 4 denotes a sea-side trolley feeder trolley disposed inside the beam 3 of the left main girder 2a on the paper, and 27 denotes the left main girder 2a on the paper similarly. This is a feeder wire for traverser disposed outside the beam 3. Reference numeral 26 denotes a land-side trolley power supply overhead line disposed inside the beam 3 of the right main girder 2a on the paper. 28 is a machine room (FIG. 1).

Next, the operation of the present embodiment will be described. Regarding the cargo handling work using the container crane 1,
An example of unloading will be described. When the container ship 21 arrives at the shore, the sea-side trolley 5 moves along the crane girder 2 to a position above the container 20 where the container ship 21 loads and stops. At this time, the land side trolley 7 and the traverser 11
It moves above the unmanned trolley 22 on the quay 23 and stops so as to overlap. The sea-side trolley 5 lowers the spreader 19, grips the container 20, lifts the spreader 19, and stops. In response to the stop of the spreader 19, power is supplied from the power supply (not shown) to the reaction plate 13 and the coil 14 of the traverser moving means (inductive linear motor) 29 via an inverter, a feeder wire 27 for the traverser, a collector, and the like. The voltage and frequency are appropriately controlled by the inverter to generate a traveling magnetic field that moves the traverser 11 in the lateral direction. The traveling magnetic field induces an eddy current between the crane girder 2 and the traverser 11 to generate thrust. The coil 15 of the traverser acceleration / deceleration means (synchronous linear motor) 30 on the land side trolley 7 is also supplied with power from a power source (not shown) in the same manner as the traverser moving means 29, so that the traverser moving means 29 and the traverser acceleration / deceleration means are supplied. 30 and simultaneously actuate the traverser 11 to start the traverser 11 and then move the traverser It moves to the stop position of the seaside trolley 5 along the crane girder 2 by the step (inductive linear motor) 29, and stops suddenly by the traverser acceleration / deceleration means (synchronous linear motor) 30 before overlapping with the seaside trolley 5. I do. Then, the spreader 19 of the seaside trolley 5 is lowered, the container 20 is lowered on the traverser 11, and the container 20 is transferred to the traverser 11. Continued
Power is supplied to the traverser moving means 29 and the traverser acceleration / deceleration means 30 on the sea side trolley 5 side, and the traverser moving means 29 and the traverser acceleration / deceleration means 30 are simultaneously operated to rapidly start the traverser 11, and then the traverser moving means (induction) Traverser acceleration / deceleration means (synchronous linear motor) 30 before moving along the crane girder 2 to a stop position of the land side trolley 7 by the crane girder 2 and overlapping with the land side trolley 7.
Causes the traverser 11 to stop suddenly. Then, the spreader 19 of the land side trolley 7 is lowered, and the container 20 is slightly lifted and stopped. When the land side trolley 7 unloads the container 20, the traverser 11 moves to a position where the traverser 11 does not hinder the container 20. Then, spreader 19
And the container 20 is placed on the unmanned trolley 22 on the quay 23 and transferred.

As for braking, regenerative braking may be used in which the linear motor is operated as a generator to convert mechanical energy due to the inertia of the traverser into electric energy and return it to the power supply side.

As described above, the inductive linear motor and the synchronous linear motor are used separately because the inductive linear motor has a simple structure and is suitable for mounting on a long crenada. On the other hand, a synchronous linear motor is expensive, but has an excellent ratio of thrust to electric power, and is suitable for sudden start and sudden stop. In addition,
When the vehicle is suddenly started and stopped in this way, a problem of load swing occurs when moving the container suspended by the conventional rope, and it takes time to stop the swing, but according to the present invention,
Since the container is moved on the traverser, no run-out problem occurs.

The loading and unloading work from the container ship 21 is repeatedly performed in this manner. On the other hand, when the container ship is loaded from the container yard to the container ship 21, the operation is the opposite of the unloading work.

Although the present invention is not limited to the above embodiment, the crane girder is provided with a reaction rate and the traverser is provided with a primary coil. On the contrary, the crane girder is provided with a primary coil and a traverser is provided with a reaction rate. Of course, various modifications can be made without departing from the spirit of the present invention.

[0027]

As described above, according to the present invention,
The traverser is moved by a traverser moving means (inductive linear motor). When the traverser starts moving and stops, the traverser moves simultaneously with the traverser moving means (synchronous linear motor).
As described above, the traverser can be rapidly accelerated and decelerated because of the sudden start and stop performed by the method (1), so that the cycle time can be shortened and the container handling efficiency can be further improved.

[Brief description of the drawings]

FIG. 1 is a front view of a container crane of the present invention.

FIG. 2 is a side view of the container crane of FIG. 1, showing a state in which a sea-side trolley and a traverser overlap.

FIG. 3 is a front view of the traverser.

FIG. 4 is a front view of a sea-side trolley.

FIG. 5 is a front view of a container crane disclosed in Japanese Patent Application No. 7-337211.

FIG. 6 is a side view of a trolley traversing device disclosed in Japanese Patent Application No. 8-304780.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container crane 2 Crane girder 2a Main girder 5 Sea side trolley 7 Land side trolley 11 Traverser 11a Projection member 13 Reaction plate 14 Coil 15 Coil 16 Permanent magnet 18 Head block 19 Spreader 20 Container 29 Traverser moving means (inductive linear motor) 30) Traverser acceleration / deceleration means (synchronous linear motor)

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Isao Sawamura 1-19-10 Mohri, Koto-ku, Tokyo Ishikawajima-Harima Heavy Industries, Ltd.Koto Office

Claims (3)

[Claims] A seaside trolley moving on a crane girder, a landside trolley, and a traverser are provided, and the traverser transfers containers between the seaside trolley and the landside trolley, and provides a seaside trolley. And the land side trolley is a container crane that lifts containers by spreaders suspended on these trolleys and loads and unloads containers between the container ship and the ground equipment, and the movement of the traverser is A pair of reaction plates constituting the secondary side of an inductive linear motor laid on the lower surface of the crane girder over the entire traversing range of the traverser, and disposed on the traverser so as to face the reaction plate. Traverser moving means comprising a pair of coils constituting the primary side of an inductive linear motor. When the movement is started and stopped, in addition to the traverser moving means, a pair of coils constituting the primary side of the synchronous linear motor provided on the traverser and the synchronous linear motor provided on both trolleys are provided. A container crane which is operated by a traverser acceleration / deceleration means constituted by a pair of permanent magnets constituting a secondary side. 2. The container crane according to claim 1, wherein the mounting positions of the coil and the reaction plate of the traverser moving means are upside down. 3. The container crane according to claim 1, wherein mounting positions of the coil and the permanent magnet of the traverser acceleration / deceleration means are opposite to each other.