JP6828951B2 - Cargo handling method by container crane and container crane - Google Patents

Description

The present invention relates to a container crane and a cargo handling method using a container crane. More specifically, the present invention aims to improve cargo handling efficiency by shortening the waiting time of the cargo handling device for ships and the cargo handling device for carriers associated with the work of attaching and detaching the connecting metal fittings. Concerning the container crane that can be used and the cargo handling method by the container crane.

As a container crane that handles the cargo of containers between the container ship anchored at the quay and the container yard, a ship cargo handling device (main trolley) that moves along the main girder and handles the container for the container ship, and the main A carrier cargo handling device (auxiliary trolley) that is installed in the intermediate girder (coupling girder) located below the girder and handles the cargo of the container to the land carrier (chassis), and moves along the intermediate girder. There is known a container crane provided with a relay cargo handling device (traverser) for relaying a container between a ship cargo handling device and a carrier cargo handling device (for example, paragraphs 0002 to 0005 of Patent Document 1). 11). In this container crane, the relay cargo handling device is used as a relay point, and the cargo handling device for the ship and the cargo handling device for the carrier perform the cargo handling of the container in parallel, so that the cargo handling device is compared with the container crane that directly handles the cargo from the cargo handling device to the carrier. We are trying to improve cargo handling efficiency.

Japanese Unexamined Patent Publication No. 11-11870

By the way, when stacking containers on a container ship in multiple stages, in order to prevent the containers from shifting or falling off due to the shaking of the container ship, the containers adjacent to each other in the vertical direction are fixed with connecting metal fittings (stacking cones, etc.). There is. The connecting metal fittings are attached to the engaging portions provided at the four corners of the bottom of the container when the container transported by the carrier is unloaded on the container ship. When unloading the containers stacked on the container ship to the carrier, the connecting metal fittings are removed from the engaging portion of the container.

Conventionally, in the container crane described in Patent Document 1 described above, in the process of loading and unloading a container with a ship handling device, the container is attached to the land by the ship handling device, or the land forming a leg structure or a detachable work place provided on land. It was lowered to the attachment / detachment work place provided on the horizontal beam (sil beam) near the land that connects the side legs and the sea side legs, and the connecting metal fittings were attached / detached to the container at the attachment / detachment work place near the land. However, in this method, in order to attach / detach the connecting metal fittings, the ship handling device needs to reciprocate the container between the vicinity of the main girder and the vicinity of the land, and the moving distance of the container by the ship handling device (cargo handling route). ) Becomes longer. In addition, the ship cargo handling device is in a standby state during the attachment / detachment work of the connecting metal fittings, and the cargo handling of the ship cargo handling device for the container ship is interrupted. Therefore, the cargo handling efficiency of the ship cargo handling device is lower than the cargo handling efficiency of the relay cargo handling device and the cargo handling device for the carrier, and as a result, there is a demerit that the standby time of the relay cargo handling device and the cargo handling device for the carrier becomes longer. ..

The present invention has been made in view of the above circumstances, and an object of the present invention is to improve cargo handling efficiency by shortening the waiting time of the cargo handling device for ships and the cargo handling device for cranes associated with the work of attaching and detaching the connecting metal fittings. The purpose is to provide a container crane and a cargo handling method using a container crane.

The container crane of the present invention for achieving the above object includes a leg structure having a plurality of legs and a main girder supported on the upper part of the leg structure and projecting from the leg structure to the sea side. An intermediate girder supported at an intermediate position between the main girder and the land of the leg structure, a ship handling device that moves along the main girder and handles a container for a container ship, and the intermediate girder. The cargo handling device for the carrier, which is provided in the above and handles the cargo of the container with respect to the carrier, and the cargo handling device for the ship and the cargo handling device for the carrier, which moves along the intermediate girder to perform relay cargo handling of the container. In a container crane equipped with a relay cargo handling device, a workbench on which a worker can board is provided in the intermediate girder, and a worker who has boarded the workbench is provided in a container in which the relay cargo handling device is used for relay cargo handling. It is characterized in that the work table and the relay cargo handling device can be brought close to each other in the intermediate girder up to a distance at which the connecting metal fitting can be attached to and detached from the engaging portion.

The cargo handling method by the container crane of the present invention for achieving the above object is supported on the upper part of a leg structure having a plurality of legs and moves along a main girder projecting from the leg structure to the sea side. The cargo handling device for the container is used to handle the container for the container ship, and the cargo handling device for the transporter is provided in the intermediate girder supported at the intermediate position between the main girder and the land of the leg structure. In a cargo handling method using a container crane that handles a container for a machine and relays the container between the ship cargo handling device and the carrier cargo handling device by a relay cargo handling device that moves along the intermediate girder. In the process of relay cargo handling of a container between the ship cargo handling device and the carrier cargo handling device by the relay cargo handling device, in the intermediate girder, the workbench on which the worker is aboard and the relay cargo handling device are moved. It is characterized in that the worker on the work table is brought close to the engaging portion provided in the container relayed by the relay cargo handling device to a distance where the connecting metal fitting can be attached / detached.

According to the present invention, in the process of relaying a container by the relay cargo handling device by bringing the workbench on which the worker can board and the relay cargo handling device close to each other in the intermediate girder, the connecting metal fitting is connected to the engaging portion of the container. Can be attached and detached. As a result, the cargo handling device for the ship and the cargo handling device for the carrier can continue the cargo handling work even during the attachment / detachment work of the connecting metal fittings. The work required to load one container is usually for a ship handling device that transfers a container to a container ship or a carrier cargo handling device that transfers a container to a carrier. In comparison, the relay cargo handling device is shorter. Therefore, the work required time of the ship cargo handling device, the carrier cargo handling device, and the relay cargo handling device can be made uniform by attaching and detaching the connecting metal fittings in the relay cargo handling process by the relay cargo handling device. As a result, it is possible to shorten the waiting time of the cargo handling device for ships and the cargo handling device for transporters due to the work of attaching and detaching the connecting metal fittings, and it is possible to improve the cargo handling efficiency of the container crane as a whole.

It is explanatory drawing which schematically exemplifies the embodiment of the container crane of this invention in the side view. It is a view of arrow A of FIG. It is explanatory drawing which schematically exemplifies the state which the relay cargo handling apparatus of FIG. 1 and a workbench are close to each other in the cross-sectional view. It is explanatory drawing which schematically exemplifies another embodiment of the container crane of this invention in a plan view. FIG. 4 is a cross-sectional view taken along the line BB of FIG.

Hereinafter, the container crane of the present invention will be described based on the embodiment shown in the figure. In the figure, the X direction is the extending direction of the main girder 4 in the horizontal direction, the Y direction is the width direction of the main girder 4 orthogonal to the X direction in the horizontal direction, and the Z direction is the vertical direction (vertical direction). ). In the following description, the sea side where the container ship 40 berths in the X direction (the right side of the paper in FIG. 1) is referred to as the sea side, and the land G side (the left side of the paper in FIG. 1) where the carrier 8 stops is the land side. That is. Further, the front side of the paper surface (lower side in FIG. 2) in FIG. 1 is referred to as the front side in the Y direction (front side in the width direction), and the back side of the paper surface (upper side in FIG. 2) in FIG. 1 is the back side in the Y direction (back side in the width direction). Side).

As illustrated in FIG. 1, the container crane 1 of the embodiment according to the present invention handles the cargo of the container 20 between the container ship 40 anchored at the quay and the carrier 8 (chassis or the like) anchored at the land G. It is a quay crane (also called a bridge crane or a gantry crane).

As illustrated in FIGS. 1 and 2, the container crane 1 includes a leg structure 2, a main girder 4, an intermediate girder 5, a ship cargo handling device 6, a carrier cargo handling device 7, a relay cargo handling device 9, and a workbench 10. And a control device 12.

The leg structure 2 is configured to have a plurality of legs 2a and 2b extending in the Z direction. Two sea-side legs 2a are arranged on the land G on the sea side near the quay, separated in the Y direction, and two land-side legs separated in the Y direction at a position on the land side of the sea-side leg 2a. The legs 2b are arranged. The sea side legs 2a and the land side legs 2b are connected by horizontal beams 2c extending in the Y direction, respectively. Traveling devices 3 are provided at the lower ends of the sea side legs 2a and the land side legs 2b, respectively.

The container crane 1 can be moved in the Y direction along the rail laid on the land G by the plurality of traveling devices 3. The leg structure 2 is further provided with ancillary equipment (not shown) such as stairs, passages, and elevators for the worker H to move to various parts of the container crane 1. The number, shape, connection position, etc. of the legs 2a, 2b, and the horizontal beam 2c constituting the leg structure 2 are not limited to this embodiment, and various other configurations can be used.

The main girder 4 is supported on the upper part of the leg structure 2. The main girder 4 extends in the X direction and projects from the leg structure 2 toward the sea. The main girder 4 of this embodiment has a girder 4a that is supported on the upper part of the leg structure 2 and extends on the land G, and a boom 4b that is connected to the sea side of the girder 4a and projects from the leg structure 2 to the sea side. It is composed of and. The girder 4a and the boom 4b are pin-joined so that the boom 4b can be raised and lowered on the XZ plane with respect to the girder 4a by an undulating mechanism (not shown).

The main girder 4 is not limited to the main girder 4 having a structure in which the boom 4b undulates with respect to the girder 4a as in this embodiment, and for example, one girder fixed to the leg structure 2. It is also possible to use a main girder composed of, a shuttle boom type main girder in which the girder can move relative to the leg structure 2 in the X direction, a break-action type main girder in which the boom can bend in the middle position, etc. it can.

The intermediate girder 5 is supported at an intermediate position between the main girder 4 and the land G in the Z direction of the leg structure 2. The intermediate girder 5 extends in the X direction and projects from the leg structure 2 to the land side. The intermediate girder 5 of this embodiment connects two girders 5a and 5b extending in the X direction arranged apart from each other in the Y direction and the land-side ends of the two girders 5a and 5b. It is configured to have a connecting beam 5c extending in the Y direction. The two girders 5a and 5b constituting the intermediate girder 5 are joined to the leg structure 2 (sea side leg 2a and land side leg 2b), respectively.

Above each of the two girders 5a and 5b, an inner rail 5d arranged on the center side of the container crane 1 in the Y direction and an outer rail 5d arranged on the outside of the container crane 1 (opposite the center side) in the Y direction. The outer rails 5e are laid one by one at intervals in the Y direction. The inner rail 5d and the outer rail 5e extend in the X direction in parallel with the girders 5a and 5b. That is, the intermediate girder 5 is laid with a pair of inner rails 5d arranged on the center side of the container crane 1 in the Y direction and a pair of outer rails 5e arranged outside the container crane 1.

The ship handling device 6 is a device that moves in the X direction along the main girder 4 to handle the container 20 with respect to the container ship 40, and is a trolley 6a, a wire rope 6b, and a hanger 6c (spreader). It is configured to have and. The trolley 6a is supported by the main girder 4 and is configured to be movable in the X direction along the main girder 4 (garda 4a and boom 4b). A rotary drum is installed in the trolley 6a, and a hanger 6c is suspended from a wire rope 6b unwound from the rotary drum. The ship handling device 6 winds up or unwinds the wire rope 6b with a rotating drum to raise and lower the hanger 6c in the Z direction to handle the container 20. In this embodiment, the case where the rotary drum is installed in the trolley 6a is illustrated, but the rotary drum is installed in the machine room provided in the leg structure 2, and the wire drawn out from the rotary drum is installed. The rope 6b may be connected to the hanger 6c via a sheave installed in the trolley 6a.

The cargo handling device 7 for a carrier is provided on the land side of the intermediate girder 5. The cargo handling device 7 for a carrier is a device that handles the cargo of the container 20 with respect to the carrier 8, and is configured to have a gate-shaped trolley 7a, a wire rope 7b, and a hanger 7c (spreader). There is. The gate-shaped trolley 7a connects a plurality of legs erected on a pair of outer rails 5e and the upper parts of the plurality of legs and extends in the Y direction from one outer rail 5e to the other outer rail 5e. It is configured to have an upper structure to be formed.

Wheels arranged on the outer rail 5e and drive units for driving the wheels are provided at the lower ends of the plurality of legs constituting the gate-shaped trolley 7a, respectively. A rotating drum is installed in the superstructure constituting the gate-shaped trolley 7a, and a hanger 7c is suspended from a wire rope 7b unwound from the rotating drum. The cargo handling device 7 for a carrier winds or unwinds the wire rope 7b with a rotating drum to raise and lower the hanger 7c in the Z direction to handle the cargo of the container 20.

The stop position of the carrier 8 is set below the portion of the intermediate girder 5 that protrudes to the land side, or below the portion between the sea side leg 2a and the land side leg 2b. Therefore, the cargo handling device 7 for the carrier handles the container 20 with respect to the carrier 8 at the portion of the intermediate girder 5 protruding to the land side or between the sea side leg 2a and the land side leg 2b. The carrier cargo handling device 7 of this embodiment is configured to be movable in the X direction along the intermediate girder 5, but the carrier cargo handling device 7 is fixed at a predetermined position of the intermediate girder 5. You can also do it.

The relay cargo handling device 9 (traverser) is a device that moves in the X direction along the intermediate girder 5 to perform relay cargo handling of the container 20 between the ship cargo handling device 6 and the carrier cargo handling device 7. The relay cargo handling device 9 is configured to include a traveling carriage 9a that can move in the X direction along the intermediate girder 5 and a pedestal 9b on which the container 20 is placed.

The traveling carriage 9a extends in the Y direction from one inner rail 5d to the other inner rail 5d, and includes a plurality of wheels and a drive unit for driving the wheels. The wheels constituting the traveling carriage 9a are arranged on a pair of inner rails 5d, and the relay cargo handling device 9 is a carrier cargo handling device 7 moving on the pair of outer rails 5e and the intermediate girder 5 in the X direction. It is configured to pass each other.

The pedestal 9b is fixed on the traveling carriage 9a, and the container 20 is placed in a direction in which the longitudinal direction is the Y direction. As illustrated in FIGS. 2 and 3, engaging portions 21 to which the connecting metal fittings 30 can be attached and detached are provided at the four corners of the bottom of the container 20, but the pedestal 9b is larger than the engaging portions 21 of the container 20. It is configured to support the inside. When the container 20 is placed on the pedestal 9b, the engaging portion 21 of the container 20 is exposed to the outside without being supported by the pedestal 9b, and the connecting metal fitting 30 can be attached to and detached from the engaging portion 21. .. The pedestal 9b of this embodiment is formed in a shape in which recesses formed inward are provided at each of the four corners of the rectangular parallelepiped in a plan view, but the pedestal 9b can be configured in various other shapes. Further, a shock absorber or a buffer member for absorbing the impact when the container 20 lands on the pedestal 9b can be provided at the portion where the container 20 lands. Providing a shock absorber or a shock absorber on the pedestal 9b is advantageous in reducing the risk of damage to the relay cargo handling device 9 and the noise generated when the container lands.

In this embodiment, the configuration in which the carrier cargo handling device 7 and the relay cargo handling device 9 move on the intermediate girder 5 by the wheels and the drive unit for driving the wheels is illustrated, but the carrier cargo handling device 7 and the relay cargo handling device 9 The mechanism for moving the relay cargo handling device 9 is not limited to this embodiment, and various other configurations can be made. For example, a rotary drum around which a wire rope is wound is installed on the intermediate girder 5, and the carrier cargo handling device 7 and the relay cargo handling device 9 are towed and moved in the X direction by the wire rope wound around the rotary drum. You can also do it.

The connecting metal fitting 30 is a metal fitting that temporarily fixes the vertically adjacent containers 20 to each other in order to prevent the container 20 from shifting or falling off due to the swing of the container ship 40 when the containers 20 are stacked in multiple stages on the container ship 40. .. The connecting metal fitting 30 is attached to the engaging portion 21 when the container 20 transported by the transporter 8 is unloaded to the container ship 40, and when the container 20 stacked on the container ship 40 is unloaded to the transporter 8. Is removed from the engaging portion 21. Examples of the connecting metal fitting 30 include a stacking cone and the like.

The workbench 10 is installed on the intermediate girder 5 and is configured so that the worker H can board. The container crane 1 of this embodiment has a workbench 10 (10A) on the sea side arranged on the sea side of the relay cargo handling device 9 and a land side arranged on the land side of the relay cargo handling device 9 in the X direction. It is equipped with a workbench 10 (10B).

As illustrated in FIG. 3, the workbench 10 (10A, 10B) has a floor portion 10a on which the worker H rides and a roof portion 10b that protects the overhead of the worker H on the workbench 10. It is composed of. The roof portion 10b is supported by a pillar portion and a wall portion erected on the floor portion 10a. Openings are provided on the relay cargo handling device 9 side and the opposite side of the workbench 10. Worker H can get on and off each workbench 10 by using ancillary equipment (stairs, passages, elevators, etc.) provided in the leg structure 2 and the intermediate girder 5.

The container crane 1 includes a moving mechanism 11 that moves the workbench 10 (10A, 10B) in the X direction along the intermediate girder 5. The moving mechanism 11 includes a plurality of wheels provided in the lower part of the floor portion 10a, and a driving unit for rotationally driving each wheel. The plurality of wheels constituting the moving mechanism 11 are arranged on a pair of inner rails 5d, respectively, and the workbench 10 is configured to pass each other in the X direction in the cargo handling device 7 for the carrier and the intermediate girder 5.

In this embodiment, the moving mechanism 11 of the workbench 10 is composed of wheels and a drive unit, but the moving mechanism 11 is not limited to this embodiment and may have various other configurations. For example, a rotating drum around which a wire rope is wound may be installed on the intermediate girder 5, and the moving mechanism 11 may be configured to pull and move the workbench 10 in the X direction by the wire rope wound around the rotating drum. .. Further, in this embodiment, the sea-side workbench 10A and the land-side workbench 10B are movable, respectively, but either the sea-side workbench 10A or the land-side workbench 10B is movable. , Or both may be fixed at a predetermined position of the intermediate girder 5.

As illustrated in FIG. 3, in the container crane 1 of the embodiment according to the present invention, the worker H boarding the workbench 10 is moved by moving either or both of the workbench 10 and the relay cargo handling device 9. The workbench 10 and the relay cargo handling device 9 can be brought close to each other up to a distance where the connecting metal fitting 30 can be attached to and detached from the engaging portion 21 of the container 20 which is relayed by the relay cargo handling device 9.

Specifically, the workbench 10 and the relay cargo handling device 9 include an end portion of the workbench 10 on the relay cargo handling device 9 side and an end portion of the container 20 relayed by the relay cargo handling device 9 on the workbench 10 side. The structure is such that the distance between the two can be approached to a position within 30 cm within the reach of the worker H, for example. In addition, the term "proximity" as used herein includes both the case where there is a gap and the case where the contact is made.

In this embodiment, a work chair is installed near the opening on the floor portion 10a on the relay cargo handling device 9 side, and when the workbench 10 and the relay cargo handling device 9 are close to each other, the worker H sitting on the work chair H The height of the pedestal 9b is set so that the engaging portion 21 of the container 20 relayed by the relay cargo handling device 9 is located at the height of the line of sight. It is also possible to attach / detach the connecting metal fitting 30 while the worker H is standing on the workbench 10 without providing the work chair on the workbench 10.

The control device 12 is a device that controls the ship handling device 6, the carrier cargo handling device 7, the relay cargo handling device 9, and the workbench 10, respectively. The ship cargo handling device 6, the carrier cargo handling device 7, the relay cargo handling device 9, and the workbench 10 are each communicably connected to the control device 12, and the ship cargo handling device 6, the carrier cargo handling device 7, and the relay cargo handling device are connected to each other. 9 and the workbench 10 operate according to the instructions input from the control device 12, respectively. The control device 12 is further communicably connected to a terminal operating system (hereinafter referred to as TOS) (hereinafter referred to as TOS) that manages the container 20 in the container terminal. In this embodiment, the control device 12 is installed in the machine room provided in the upper part of the leg structure 2, but the installation position of the control device 12 is not particularly limited and may be installed in a place other than the machine room. it can.

In this embodiment, the workbench 10 is further provided with a storage container 13, an elevating device 14, a distance detection device 15, an input device 16, and a display device 17. The storage container 13 is a container for storing the connecting metal fitting 30 removed from the engaging portion 21 of the container 20 and the connecting metal fitting 30 to be attached to the engaging portion 21 of the container 20 from now on. The elevating device 14 is a device for raising and lowering the storage container 13 between the workbench 10 and the land G. The elevating device 14 extends from the installation space of the storage container 13 provided on the floor 10a to a position outside the floor 10a along a guide rail extending in the X direction provided under the roof 10b. It is configured to be movable.

The distance detection device 15 is a device that detects the distance between the relay cargo handling device 9 and the workbench 10. In this embodiment, the distance detection device 15 is installed at the end of the workbench 10 on the side facing the relay cargo handling device 9. The distance detection device 15 can also be installed in the relay cargo handling device 9 or the intermediate girder 5. The input device 16 is a device that inputs information to the control device 12 that the attachment / detachment work of the connecting metal fitting 30 has been completed. The display device 17 displays the work status of each device input from the control device 12 and the work instruction to be performed by the worker H. The input device 16 and the display device 17 are installed near the work chair installed on the workbench 10.

The container crane 1 of this embodiment is further provided with a guard member 18 for protecting the workbench 10A at a position higher than the workbench 10A of the sea side leg 2a. The guard member 18 projects from the sea side leg 2a to the land side, and is installed extending from one sea side leg 2a to the other sea side leg 2a in the Y direction. The guard member 18 is formed by, for example, combining steel frames. In this embodiment, the case where the guard member 18 is installed on the leg structure 2 is illustrated, but a structure having the guard member 18 on the intermediate girder 5 can also be erected.

Next, a cargo handling method using the container crane 1 will be described.

When unloading the container 20 stacked on the container ship 40 to the land carrier 8, first, the container 20 to be unloaded is designated by TOS, and the TOS gives an instruction to unload the container 20 from the control device. It is input to 12. Then, under the control of the control device 12, the ship handling device 6 picks up the container 20 at the designated location of the container ship 40, and raises the picked up container 20 to the vicinity of the main girder 4. Then, the ship cargo handling device 6 in the state where the container 20 is picked up is set at the delivery position of the container 20 between the ship cargo handling device 6 and the relay cargo handling device 9 (hereinafter referred to as the first delivery position) set by the control device 12. Move toward the land side. The first delivery position is set by the control device 12 at an arbitrary position in the X direction of the intermediate girder 5 according to the work progress of the ship cargo handling device 6, the relay cargo handling device 9, and the carrier cargo handling device 7. When the first delivery position is set, the relay cargo handling device 9 also moves toward the first delivery position under the control of the control device 12. The workbench 10A on the sea side stands by under the guard member 18 until the ship cargo handling device 6 in the state where the container 20 is picked up moves to the land side of the guard member 18.

When the ship cargo handling device 6 and the relay cargo handling device 9 arrive at the first delivery position, the ship cargo handling device 6 lowers the container 20 that it is holding and places the container 20 on the pedestal 9b of the relay cargo handling device 9. Then, the container 20 is disengaged by the hanger 6c of the ship cargo handling device 6, and the container 20 is delivered from the ship cargo handling device 6 to the relay cargo handling device 9. When the delivery of the container 20 to the relay cargo handling device 9 is completed, the ship handling device 6 shifts to the work of handling the next designated container 20 input from the TOS to the control device 12.

On the other hand, when the delivery of the container 20 to the relay cargo handling device 9 is completed, the control device 12 sets the attachment / detachment work position of the connecting metal fitting 30 that brings the relay cargo handling device 9 and the workbench 10A on the sea side close to each other. Then, the control device 12 controls the relay cargo handling device 9 and the workbench 10A on the sea side to be close to each other until the worker H on the workbench 10A on the sea side can attach / detach the connecting metal fitting 30. Be told. In this embodiment, the separation distance data between the relay cargo handling device 9 detected by the distance detection device 15 and the workbench 10A on the sea side is sequentially input to the control device 12, and the control device 12 handles the relay cargo based on the separation distance data. Control is performed so that the device 9 and the workbench 10A are brought close to each other.

The attachment / detachment work position is set to an arbitrary position in the X direction of the intermediate girder 5 according to the work progress of the ship cargo handling device 6, the relay cargo handling device 9, and the carrier cargo handling device 7. When the attachment / detachment work position is set to the same position as the first delivery position, the workbench 10A on the sea side moves closer to the relay cargo handling device 9 stopped at the first delivery position, so that the sea The workbench 10A on the side and the relay cargo handling device 9 are in close proximity to each other. When the attachment / detachment work position and the first delivery position are set to different positions, the seaside workbench 10A and the relay cargo handling device 9 move toward the attachment / detachment work position, respectively, and the seaside workbench The 10A and the relay cargo handling device 9 are in close proximity to each other.

Then, when the workbench 10A on the sea side and the relay cargo handling device 9 come close to each other and both stop, the display device 17 installed on the workbench 10A on the sea side is connected to the worker H boarding the workbench 10A. An instruction to remove the metal fitting 30 is displayed. Then, the worker H removes the connecting metal fitting 30 attached to the engaging portion 21 on the sea side of the container 20 which is relayed and handled by the relay cargo handling device 9. When the removal of the connecting metal fitting 30 on the sea side is completed, the worker H boarding the workbench 10A on the sea side inputs the information that the removal of the connecting metal fitting 30 is completed to the control device 12 by the input device 16.

When the information that the disconnection of the connecting metal fitting 30 is completed is input to the control device 12, the workbench 10A on the sea side moves to the sea side again to the standby place under the guard member 18 under the control of the control device 12. The ship handling device 6 waits until the next container 20 is delivered to the relay cargo handling device 9.

On the other hand, when it is input to the control device 12 that the disconnection of the connecting metal fitting 30 is completed, the relay cargo handling device 9 and the carrier cargo handling device 7 are controlled by the control device 12 to handle the relay cargo handling device 9 and the carrier cargo handling device 7. It moves to the delivery position of the container 20 with the device 7 (hereinafter, referred to as the second delivery position). The second delivery position is set directly above the stop position of the carrier 8 scheduled to mount the container 20 in which the relay cargo handling device 9 is relay cargo handling.

When the relay cargo handling device 9 arrives at the second delivery position, the control device 12 controls the relay cargo handling device 9 and the workbench 10B on the land side to be close to each other, and the relay cargo handling device stopped at the second delivery position. As the land-side workbench 10B moves closer to 9, the land-side workbench 10B and the relay cargo handling device 9 are in close proximity to each other.

When the workbench 10B on the land side and the relay cargo handling device 9 come close to each other and both stop, the display device 17 installed on the workbench 10B on the land side is connected to the worker H on the workbench 10. An instruction to remove the metal fitting 30 is displayed. Then, the worker H removes the connecting metal fitting 30 attached to the land-side engaging portion 21 of the container 20 which is relayed and handled by the relay cargo handling device 9. As described above, all the connecting metal fittings 30 are removed from the container 20.

When the removal of the connecting metal fitting 30 is completed, the worker H boarding the workbench 10B on the land side inputs the information that the removal of the connecting metal fitting 30 is completed to the control device 12 by the input device 16. When the information that the removal of the land-side connecting metal fitting 30 is completed is input to the control device 12, the land-side workbench 10B moves to the standby place at the land-side end of the intermediate girder 5 under the control of the control device 12. .. Then, the workbench 10B on the land side is in a standby state until the next container 20 arrives at the second delivery position by the relay cargo handling device 9.

On the other hand, when the information that the removal of the connecting metal fitting 30 on the land side is completed is input to the control device 12, the container 20 in which the cargo handling device 7 for the carrier is mounted on the relay cargo handling device 9 is controlled by the control device 12. Is picked up, and the picked up container 20 is raised above the relay cargo handling device 9. Then, when the delivery of the container 20 between the carrier cargo handling device 7 and the relay cargo handling device 9 is completed, the relay cargo handling device 9 moves toward the sea side toward the first receiving position for receiving the next container 20.

After the relay cargo handling device 9 is separated from the carrier cargo handling device 7, the carrier cargo handling device 7 lowers the container 20 being picked up and places the container 20 on the carrier 8. Then, the container 20 is disengaged by the hanger 7c of the cargo handling device 7 for the carrier, and the container 20 is delivered to the carrier 8. When the delivery of the container 20 from the carrier cargo handling device 7 to the carrier 8 is completed, the carrier cargo handling device 7 raises the hanger 7c to a position higher than the intermediate girder 5 and receives the next container 20. Move to. With the above, one cycle of unloading work is completed. The above-mentioned steps are repeated in parallel by the ship cargo handling device 6, the relay cargo handling device 9, the carrier cargo handling device 7, and the workbench 10 (10A, 10B), thereby sequentially unloading a plurality of containers 20. Do.

The work of unloading the container 20 from the land carrier 8 to the container ship 40 is performed in the reverse procedure of the unloading work procedure described above. Briefly, first, the container 20 mounted on the carrier 8 is picked up by the carrier cargo handling device 7 at the second delivery position, and the relay cargo handling device 9 is picked up by the carrier cargo handling device 7 (second delivery position). ), The container 20 picked up by the carrier cargo handling device 7 is raised to a position higher than the relay cargo handling device 9.

Next, the relay cargo handling device 9 moves below the container 20 picked up by the carrier cargo handling device 7, and the container 20 picked up by the carrier cargo handling device 7 is placed on the pedestal 9b of the relay cargo handling device 9. Place. Next, the container 20 is disengaged by the hanger 7c of the carrier cargo handling device 7, and the container 20 is delivered to the relay cargo handling device 9. When the container 20 is delivered to the relay cargo handling device 9, the workbench 10B on the land side moves closer to the relay cargo handling device 9, and the workbench 10B on the land side and the relay cargo handling device 9 are engaged on the land side in close proximity to each other. The connecting metal fitting 30 is attached to the portion 21. When the attachment of the connecting metal fitting 30 on the land side is completed, the relay cargo handling device 9 moves to the sea side toward the attachment / detachment work position of the connecting metal fitting 30 with the workbench 10A on the sea side. The workbench 10A on the sea side also moves to the land side toward the attachment / detachment work position of the connecting metal fitting 30.

Then, the connecting metal fitting 30 is attached to the engaging portion 21 on the sea side in a state where the workbench 10A on the sea side and the relay cargo handling device 9 are close to each other at the attachment / detachment work position. When the attachment of the sea-side connecting metal fitting 30 is completed, the sea-side workbench 10A returns to the standby place under the guard member 18. Then, the relay cargo handling device 9 and the ship cargo handling device 6 each move toward the first delivery position.

When the relay cargo handling device 9 and the ship cargo handling device 6 arrive at the first delivery position, the ship cargo handling device 6 picks up the container 20 mounted on the relay cargo handling device 9 and moves the container 20 to the sea side. , Stacked on the container ship 40. With the above, one cycle of unloading work is completed. The above-mentioned steps are repeated in parallel by the ship handling device 6, the relay cargo handling device 9, the carrier cargo handling device 7, and the workbench 10 (10A, 10B), thereby sequentially unloading a plurality of containers 20. ..

As described above, according to the present invention, in the process of relaying the container 20 by the relay cargo handling device 9 by bringing the workbench 10 on which the worker H can board and the relay cargo handling device 9 close to each other in the intermediate girder 5. The connecting metal fitting 30 can be attached to and detached from the engaging portion 21 of the container 20. As a result, the cargo handling device 6 for the ship and the cargo handling device 7 for the carrier can continue to perform the cargo handling work even during the attachment / detachment work of the connecting metal fitting 30. The work required for loading and unloading one container 20 is usually the ship handling device 6 that transfers the container 20 to the container ship 40 and the container 20 to be transferred to the carrier 8. The relay cargo handling device 9 is shorter than the cargo handling device 7 for a carrier. Therefore, by attaching and detaching the connecting metal fitting 30 in the relay cargo handling process by the relay cargo handling device 9, the work required time of the ship cargo handling device 6, the carrier cargo handling device 7, and the relay cargo handling device 9 can be made uniform. .. As a result, the waiting time of the ship cargo handling device 6 and the carrier cargo handling device 7 due to the attachment / detachment work of the connecting metal fitting 30 can be shortened, and the cargo handling efficiency of the container crane 1 as a whole can be improved.

When the relay cargo handling device 9 is provided with a pedestal 9b that supports the inside of the engaging portion 21 of the container 20 as in this embodiment, the container 20 is relayed with the engaging portion 21 exposed to the outside. Since the cargo can be handled, the worker H on the workbench 10 can easily and safely attach / detach the connecting metal fitting 30 to / from the engaging portion 21.

In the present invention, the workbench 10 may be fixed at a predetermined position of the intermediate girder 5 without having the moving mechanism 11, but in that case, when the connecting metal fitting 30 is attached / detached, the workbench 10 may be fixed at a predetermined position. It is necessary to move the relay cargo handling device 9 in which the container 20 is placed close to the fixed workbench 10. Therefore, the moving distance (cargo handling route) of the relay cargo handling device 9 in the intermediate cargo handling process becomes long. On the other hand, if the workbench 10 (10A, 10B) is provided with the moving mechanism 11 as in this embodiment, the workbench 10 can move closer to the relay cargo handling device 9, so that the workbench 10 can move closer to the relay cargo handling device 9. Compared to the case where is fixed, the moving distance of the relay cargo handling device 9 in the intermediate cargo handling process can be shortened, and the work time required for the intermediate cargo handling device 9 can be shortened.

Further, when the workbench 10 is fixed, if the first delivery position is set to a position far from the fixed position (standby position) of the workbench 10, the moving distance of the relay cargo handling device 9 becomes long, and the relay cargo handling device The work time required for 9 becomes longer. Therefore, the first delivery position is limited to a range close to the fixed workbench 10. Further, since the workbench 10 is fixed, the attachment / detachment work position of the connecting metal fitting 30 cannot be changed.

On the other hand, if the workbench 10 is provided with the moving mechanism 11, the intermediate cargo handling device 9 and the workbench 10 can be moved respectively, so that the first delivery position and the attachment / detachment work position are far from the standby position of the workbench 10. Even when the position is set, the work time required for the relay cargo handling device 9 can be shortened. Therefore, by configuring the workbench 10 with the moving mechanism 11, it is possible to set the first delivery position and the attachment / detachment work position to arbitrary positions in the X direction of the intermediate girder 5, respectively. As a result, the first delivery position and the attachment / detachment work are set for each container 20 according to the work progress of the ship handling device 6, the transporting machine handling device 7, the relay cargo handling device 9, and the workbench 10 (10A, 10B). It is possible to set each of the positions to an advantageous position for improving the cargo handling efficiency of the container crane 1 as a whole.

More specifically, the work time required for the ship handling device 6 to handle one container 20 varies depending on the placement position of the container 20 performing cargo handling on the container ship 40. Regarding the X direction, the movement distance of the ship handling device 6 is longer in the case of loading and unloading the container 20 on the sea side of the container ship 40 than in the case of loading and unloading the container 20 on the land side of the container ship 40. The time required will also be longer. In the Z direction, the distance for raising and lowering the hanger 6c of the ship handling device 6 is larger in the case of loading and unloading the container 20 in the deep position of the container ship 40 than in the case of loading and unloading the container 20 in the shallow position of the container ship 40. Since it is long, the work time is also long.

On the other hand, the work time required for the carrier 7 to handle one container 20 changes under the influence of the carrier 8. For example, if the carrier 8 has already arrived at the second delivery position, the work time required for the carrier 7 is shortened, but if the carrier 8 arrives late, the carrier 8 is accompanied by the delay. The work time required for the cargo handling device 7 is also increased. Further, since the relay cargo handling device 9 performs relay cargo handling between the ship cargo handling device 6 and the carrier cargo handling device 7, the work time required for the relay cargo handling device 9 is also the ship cargo handling device 6 and the carrier cargo handling device 7. It changes under the influence of.

As described above, in the container crane 1 provided with the ship cargo handling device 6, the carrier cargo handling device 7, and the relay cargo handling device 9, the ship cargo handling device 6, the carrier cargo handling device 7, and the relay cargo handling device 9 are provided for each container 20. Although the required work time varies, the first delivery position for delivering the container 20 between the ship cargo handling device 6 and the relay cargo handling device 9 and the attachment / detachment work position of the connecting metal fitting 30 are set to the ship cargo handling device 6, respectively. By setting the difference between the work required times of the transporter cargo handling device 7 and the intermediate cargo handling device 9 to be small, the standby time of each of the ship cargo handling device 6, the transporter cargo handling device 7, and the intermediate cargo handling device 9 is set. Can be shortened to improve the cargo handling efficiency of the container crane 1 as a whole.

Specifically, for example, when the cargo handling by the ship cargo handling device 6 precedes and the cargo handling of the relay cargo handling device 9 is delayed, the first delivery position is set so that the moving distance of the relay cargo handling device 9 becomes short. By setting it on the land side, the work required time of the ship cargo handling device 6 and the relay cargo handling device 9 can be made uniform, and the standby time of each can be shortened. On the contrary, when it takes time for the ship handling device 6 to handle the cargo and the relay cargo handling device 9 completes the cargo handling of the container 20 in front of the container 20 and has a margin, the moving distance of the ship handling device 6 is shortened. 1 By setting the delivery position to the sea side, the work required time of the ship cargo handling device 6 and the relay cargo handling device 9 can be made uniform, and the standby time of each can be shortened.

Further, the attachment / detachment work position can be set to the same position as the first delivery position, but the attachment / detachment work position is determined by the time required for the relay cargo handling device 9 and the workbench 10A on the sea side to arrive at the attachment / detachment work position. When the total time required for the relay cargo handling device 9 to arrive at the second delivery position is set to be shorter, the total work of delivering the container 20 from the relay cargo handling device 9 to the carrier cargo handling device 7 The required time can be shortened. Then, by shortening the work required time of the relay cargo handling device 9, the standby time of the carrier cargo handling device 7 can also be shortened. In this way, the first delivery position and the attachment / detachment work position are appropriately set according to the work progress of the ship cargo handling device 6, the transporter cargo handling device 7, the intermediate cargo handling device 9, and the workbench 10. It is possible to shorten the work required time for loading and unloading one container 20 of the container crane 1 and improve the cargo handling efficiency.

In the above description, the merit when the workbench 10 has the moving mechanism 11 has been described, but when the workbench 10 is fixed to the intermediate girder 5, the workbench 10 can be simply configured. There is an advantage that the equipment cost of the container crane 1 can be kept low.

In the container crane 1 of the embodiment according to the present invention, the worker H transfers from the workbench 10 to the relay cargo handling device 9 in a state where the workbench 10 and the relay cargo handling device 9 are close to each other, and the worker H transfers the relay cargo handling device 9. It is also possible to attach / detach the connecting metal fitting 30 to / from all the engaging portions 21 of the container 20 on 9. However, as in this embodiment, the workbench 10A on the sea side arranged on the sea side of the relay cargo handling device 9 and the workbench 10B on the land side arranged on the land side of the relay cargo handling device 9 are provided. With this configuration, the connecting metal fittings 30 on the land side and the sea side of the container 20 can be attached and detached while the worker H is on the workbenches 10A and 10B, so that the work of attaching and detaching the connecting metal fittings 30 can be made more efficient. Will be more advantageous.

If the workbench 10 is provided with a roof portion 10b that protects the overhead of the worker H on board as in this embodiment, the workbench 10 may be in the process of handling the container 20 by the ship handling device 6. On the other hand, even when the connecting metal fitting 30 or the like falls, the roof portion 10b can reliably protect the worker H who has boarded the workbench 10. Further, by providing the roof portion 10b, it is possible to block rain and sunlight, which contributes to the improvement of the working environment of the worker H.

Further, if the guard member 18 for protecting the workbench 10 is provided as in this embodiment, even if the container falls during the cargo handling of the container 20 by the ship handling device 6, the workbench 10 is provided by the guard member 18. Can be protected. Therefore, it is more advantageous to improve the safety of the worker H who gets on the workbench 10.

When the workbench 10 is provided with the storage container 13 and the lifting device 14, the connecting metal fitting 20 can be easily moved between the workbench 10 and the land G without the worker H leaving the workbench 10. Becomes possible. Therefore, it is advantageous to improve the efficiency of the work of collecting the connecting metal fitting 20 from the workbench 10 and the work of supplying the connecting metal fitting 20 to the workbench 10.

4 and 5 show an example of a container crane 1 according to another embodiment of the present invention. The container crane 1 of this embodiment is different from the container crane 1 of the embodiment illustrated in FIGS. 1 to 3 in the configuration of the intermediate girder 5 and the workbench 10. Other configurations are the same as those of the container crane 1 of the embodiment illustrated in FIGS. 1 to 3.

In the container crane 1 of the embodiment illustrated in FIGS. 1 to 3, the case where the intermediate girder 5 projects to the land side from the land side leg 2b in the X direction is illustrated, but as illustrated in FIG. 4, this case is illustrated. The land-side end of the intermediate girder 5 of the container crane 1 of the embodiment is set at the same position as the land-side leg 2b. In this embodiment, the stop position of the carrier 8 is set below the portion between the sea side leg 2a and the land side leg 2b of the intermediate girder 5, and the cargo handling device 7 for the carrier is the sea side leg 2a of the intermediate girder 5. The container 20 is handled by the carrier 8 at the portion between the land side leg 2b and the land side leg 2b.

As illustrated in FIG. 4, the container crane 1 is provided with one workbench 10 (10C) on the sea side of the relay cargo handling device 9 of the intermediate girder 5, and the workbench 10 on the land side. Is not provided. In this embodiment, when the container crane 1 is viewed from the Y direction, the workbench 10C is the front side in the Y direction (front side in the width direction) and the back side in the Y direction (width) of the container 20 relayed by the relay cargo handling device 9. It is provided with a floor portion 10a located on the back side in the direction. From a different point of view, the floor portion 10a of the workbench 10C is a U-shape that surrounds the container 20 mounted on the relay cargo handling device 9 in a plan view from three directions: the sea side, the front side in the Y direction, and the back side in the Y direction. It is formed in a shape. A worker H on the floor portion 10a on the front side in the Y direction and a worker H on the floor portion 10a on the back side in the Y direction are provided in the container 20 relayed by the relay cargo handling device 9. The workbench 10C and the relay cargo handling device 9 can be brought close to each other up to a distance at which the connecting metal fitting 30 can be attached to and detached from the engaging portion 21 on the front side in the Y direction and the engaging portion 21 on the back side in the Y direction. There is.

As illustrated in FIG. 5, the lower end of the floor portion 10a located on the land side of the workbench 10C on the front side in the Y direction and the back side in the Y direction is located higher than the upper end portion of the traveling carriage 9a of the relay cargo handling device 9. The floor portion 10a on the front side in the Y direction and the floor portion 10a on the back side in the Y direction can be overlapped with the traveling carriage 9a of the relay cargo handling device 9, respectively.

In this embodiment, the worker H is on the floor portion 10a on the front side in the Y direction and the floor portion 10a on the back side in the Y direction, respectively, and the worker H and Y are on the floor portion 10a on the front side in the Y direction. Worker H, who is on the floor portion 10a on the far side in the direction, attaches / detaches the connecting metal fitting 30 to / from the two engaging portions 21 arranged apart from each other in the lateral direction of the container 20.

In this way, the workbench 10C is located on the front side in the Y direction and the back side in the Y direction of the container 20 relayed by the relay cargo handling device 9 in a state where the relay cargo handling device 9 and the workbench 10 are close to each other. When the configuration including the floor portion 10a is provided, the connecting metal fitting 30 can be attached to and detached from all the engaging portions 21 at the four corners of the container 20 with one workbench 10C, so that the time required for attaching and detaching the connecting metal fitting 30 can be shortened. Will be more advantageous. Further, since the distance between the two engaging portions 21 arranged apart from each other in the lateral direction of the container 20 is as close as about 2.4 m, one worker H can connect the fittings to the two engaging portions 21. The attachment / detachment of 30 can be completed in a short time. Therefore, the connecting metal fitting 30 can be efficiently attached and detached with a small number of personnel.

The workbench 10C of this embodiment is provided with work chairs that move in the X direction on the floor portion 10a on the front side in the Y direction and the floor portion 10a on the back side in the Y direction, respectively. By providing the workbench 10C with a movable work chair in this way, the worker H can move between the engaging portions 21 while sitting, so that the work of attaching and detaching the connecting metal fitting 30 is made more efficient. It is possible to reduce the labor of the worker H.

In the above, the cases where the workbenches 10A and 10B are provided on the sea side and the land side, respectively, and the cases where the U-shaped workbench 10C is provided on the sea side are illustrated, but the shape and arrangement of the workbench 10 The presence or absence of the moving mechanism 11 is not limited to the above embodiment, and various other configurations can be made. For example, the workbench 10 on the sea side of the relay cargo handling device 9 may be provided with the moving mechanism 11, and the workbench 10 on the land side of the relay cargo handling device 9 may be fixed to the intermediate girder 5. Further, for example, the U-shaped workbench 10C illustrated in FIGS. 4 and 5 may be provided on the land side of the relay transfer device 9.

1 Container crane 2 Leg structure 3 Traveling device 4 Main girder 5 Intermediate girder 6 Cargo handling device for ships 7 Cargo handling device for transporter 8 Carrier 9 Relay cargo handling device 9a Traveling trolley 9b Pedestal 10 (10A, 10B, 10C) Worktable 11 Moving Mechanism 12 Control device 13 Storage container 14 Elevating device 15 Distance detection device 16 Input device 17 Display device 18 Guard member 20 Container 21 Engagement part 30 Connecting bracket 40 Container ship H Worker G Land

Claims (9)

A leg structure having a plurality of legs, a main girder supported on the upper part of the leg structure and protruding toward the sea from the leg structure, and a support at an intermediate position between the main girder and the land of the leg structure. For the intermediate girder, the ship cargo handling device that moves along the main girder and handles the cargo of the container to the container ship, and the carrier provided in the intermediate girder that handles the container to the transporter. In a container crane including a cargo handling device and a relay cargo handling device that moves along the intermediate girder and relays a container between the ship handling device and the carrier cargo handling device.
A workbench on which a worker can board is provided on the intermediate girder, and a connecting metal fitting is attached to and detached from an engaging portion provided in a container in which a worker on the workbench is relayed by the relay cargo handling device. A container crane characterized in that the workbench and the relay cargo handling device are close to each other in the intermediate girder up to a distance capable of carrying out the above. The container crane according to claim 1, further comprising a pedestal on which the container is placed on the relay cargo handling device, and the pedestal supports the inside of the engaging portion of the container. The container crane according to claim 1 or 2, further comprising a moving mechanism for moving the workbench along the intermediate girder. The container crane according to any one of claims 1 to 3, wherein the workbench is provided with a roof portion that protects the overhead of the workers on board. The container crane according to any one of claims 1 to 4, wherein a guard member installed at a position higher than the workbench and protecting the workbench is provided on the leg structure or the intermediate girder. The container according to any one of claims 1 to 5, wherein the workbench is provided with a storage container for storing the connecting metal fitting and an elevating device for raising and lowering the storage container between the workbench and the land. crane. In the extending direction of the main girder, the workbench on the sea side arranged on the sea side of the relay cargo handling device and the workbench on the land side arranged on the land side of the relay cargo handling device are provided. The container crane according to any one of claims 1 to 6. When the container crane is viewed from the width direction of the main girder, which is orthogonal to the extending direction of the main girder in the horizontal direction, the workbench is on the front side in the width direction of the container relayed by the relay cargo handling device. A worker who has a floor located on the back side in the width direction and who is on the floor on the front side in the width direction and a worker who is on the floor on the back side in the width direction are relayed by the relay cargo handling device. With the workbench up to a distance at which the connecting metal fitting can be attached to and detached from the engaging portion on the front side in the width direction and the engaging portion on the back side in the width direction provided in the container being handled. The container crane according to any one of claims 1 to 6, which has a configuration in which the relay cargo handling device can be approached. A ship cargo handling device that is supported on the upper part of a leg structure having a plurality of legs and moves along a main girder projecting from the leg structure to the sea side handles the cargo of a container with respect to the container ship, and the leg structure. A transporter cargo handling device provided in an intermediate girder supported at an intermediate position between the main girder and the land of the body handles the cargo of a container to the transporter, and relay cargo handling that moves along the intermediate girder. In a cargo handling method using a container crane that relays cargo handling of a container between the ship cargo handling device and the carrier cargo handling device by the device.
In the process of relay cargo handling of the container between the ship cargo handling device and the transporter cargo handling device by the relay cargo handling device, the workbench on which the worker is aboard and the relay cargo handling device are placed in the intermediate girder. By a container crane characterized in that the worker on the workbench is brought close to the engaging portion provided in the container relayed by the relay cargo handling device to a distance where the connecting metal fittings can be attached and detached. Cargo handling method.

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