JP5194037B2 - Cargo handling system and cargo handling method - Google Patents

Description

  The present invention relates to a cargo handling system and a cargo handling method.

Conventionally, it is known to use, as a fuel, wood pellets that are formed using a residual material generated when wood is processed as a raw material. For example, it is known that coal or oil is used as a main fuel, and wood pellets are used as a secondary fuel to generate power using the heat generated at this time.
In general, facilities such as power plants that consume wood pellets are constructed in locations facing the harbor. Such facilities may be provided with a cargo handling system for transporting coal or wood pellets transported by sea to a consumer such as a power plant that consumes coal or wood pellets. An example of a cargo handling system is a silo that accommodates and stores a berth for a ship such as a bulk carrier that transports coal and wood pellets, and a work that has been transported from a ship that has berthed on the berth. And a conveyor provided between a berth and a silo.
Moreover, as what conveys a granular conveyance target object (henceforth a "work"), for example, patent document 1 describes the container for a granular material transportation provided with the hatch in the panel of the ceiling side. Yes.

Japanese Utility Model Publication No.59-19590

However, in a work transport system that transports coal and wood pellets to a silo using a conveyor and stores the coal and wood pellets using a silo, it is necessary to construct a silo and a conveyor at a port facility. For this reason, there exists a possibility that the cost required in order to install a cargo handling conveyance system in a port facility may become high.
In addition, it is conceivable to use the powder particle transport container described in Patent Document 1 as a transport means for transporting coal or wood pellets to a silo, but the powder particle transport container described in Patent Document 1 may be used. The transport capacity per one is lower than the transport capacity of a conveyor that transports coal or wood pellets to a silo. For this reason, the cargo handling time for loading and unloading coal and wood pellets from a ship becomes long, and cargo handling efficiency falls.

  This invention is made | formed in view of the situation mentioned above, Comprising: The objective is providing the cargo handling conveyance system which can reduce the cost required for installation and operation, suppressing the cargo handling efficiency falling. is there.

In order to solve the above problems, the present invention proposes the following means.
The cargo handling and conveying system of the present invention is a cargo handling and conveying system that conveys a work consumed at a consumer from a ship to the consumer, a loading / unloading unit that loads and unloads the work stacked on the ship from the ship, From the container in which the work loaded and unloaded from the ship by the loading and unloading unit is housed, a stacking unit for collecting a plurality of the containers by providing an empty space on which at least one container can be placed, and the loading and unloading unit First conveying means for conveying the container to the accumulating section; second conveying means for placing the container conveyed by the first conveying means on the accumulating section; and the work from the accumulating section to the consumption destination includes but a third transport means for transporting the contained the vessel, and a fourth conveying means for conveying the container in which the workpiece is not accommodated to the unloading section, The loading / unloading unit accommodates the workpiece in the container, the first conveying means conveys the container accommodating the workpiece to the accumulation unit, and the accumulation unit accommodates the workpiece. by a plurality of said containers state are arranged in alignment, characterized in that.

  Moreover, it is preferable that a said 4th conveyance means is a said 1st conveyance means after the said container is dropped in the said accumulation part by the said 2nd conveyance means.

  The unloading part includes a hopper for storing the workpiece, a pipe line having one end connected to the hopper and opened to the inside of the hopper, the other end opened toward the container, and the workpiece flowing therein. And an adjustment valve that adjusts the flow rate of the workpiece that flows toward the hopper and that is connected to the hopper, and has one opening on the side connected to the hopper. The pipe line is preferably formed to be branched into a plurality as it goes from the hopper to the container, and there are a plurality of openings of the pipe line directed to the container.

  Moreover, it is preferable that the said container has a ceiling part on the upper side, and the several through-hole which introduces the said workpiece | work dropped from the opening of the said other end of the said pipe line is formed in the said ceiling part. .

  In addition, a plurality of sets of the hopper, the pipe line, and the regulating valve are provided, and the pipe line is arranged to be able to communicate with the plurality of through holes of the containers in the plurality of containers arranged side by side. It is preferable that the pipe line is configured to drop the work with respect to the plurality of containers arranged side by side to accommodate the work in the container.

  Further, it is preferable that four through holes are provided per one container.

  In addition, a plurality of empty containers in which the workpieces are not housed are stacked in the stacking unit before the workpieces are unloaded from the ship, and the second transport unit is transported by the first transport unit. Preferably, the container is placed in the empty space, and the empty container is loaded from the stacking unit onto the fourth transport means.

  The second transport unit includes a travel mechanism that travels in a linear direction in the stacking unit, and the stacking unit places a plurality of the containers side by side in a direction orthogonal to the travel direction of the second transport unit. The plurality of containers can be placed side by side along the direction of travel of the second transport means, and the empty space is traveled by the second transport means before the work is unloaded from the ship. It is preferably located at the end of the stacking part in the direction.

  In addition, the stacking unit can place a plurality of the containers in a direction along the traveling direction of the second conveying means, and arrange the plurality of containers side by side in a direction orthogonal to the traveling direction of the second conveying means. Preferably, the empty space is located at the end of the stacking unit in a direction orthogonal to the traveling direction of the second transport means before the work is unloaded from the ship.

  Moreover, it is preferable that said 1st conveyance means has a vibration means to vibrate the said container.

The cargo handling and conveying method of the present invention loads the empty container from a stacking unit in which empty containers that do not contain the workpiece and are collected to a conveying vehicle that conveys the container. After the loading step, the empty container is conveyed by the empty container conveying step, and the empty container conveying step is carried by the conveying vehicle to a loading / unloading unit for unloading the workpiece from a ship in which the workpieces are stacked. A transfer step of transferring the work from the unloading unit to the empty container, and an actual transfer of the actual container on which the work has been transferred in the transfer step from the unloading unit to the stacking unit by the transfer vehicle. A container transporting step and the actual container transported in the actual container transporting step is lowered from the transporting vehicle in the stacking unit in the actual storage Comprising a container unloading process for placing the container on the stacking unit, and by the vessel down step, a plurality of the lucrative container is aligned in the stacking unit, after the container down process, the container down step The loading process is started with respect to the transport vehicle in which the actual container is lowered.

  According to the cargo handling transport system of the present invention, it is possible to reduce the cost required for installation and operation while suppressing a decrease in cargo handling efficiency.

1 is an overall view showing a work transportation system including a cargo handling system according to a first embodiment of the present invention. It is a fragmentary sectional view which shows the structure of the unloading part of the cargo handling conveyance system. (A) And (B) is a schematic diagram which shows the structure of a part of temporary storage part in the cargo handling conveyance system. It is a schematic diagram which shows a part of structure of the temporary storage part of the cargo handling conveyance system. It is a top view which shows the stacking part in the cargo handling conveyance system. It is a front view which shows the yard crane in the cargo handling conveyance system. (A) is a side view showing an integrated vehicle in the cargo handling and conveyance system, and (B) is a plan view showing a vibration exciter. It is a perspective view which shows the structure of the container in the cargo handling conveyance system. It is a flowchart for demonstrating the operation | movement at the time of use of the cargo handling conveyance system. It is operation | movement explanatory drawing for demonstrating operation | movement at the time of use of the cargo handling conveyance system. (A) And (B) is operation | movement explanatory drawing for demonstrating the operation | movement at the time of use of the cargo handling conveyance system. It is operation | movement explanatory drawing for demonstrating the operation | movement at the time of use of the cargo handling conveyance system of the embodiment. (A) is a top view which shows the structure of the cargo handling conveyance system of 2nd Embodiment of this invention, (B) and (C) are operation | movement explanatory drawings for demonstrating the operation | movement at the time of use of the cargo handling conveyance system. It is a schematic diagram which shows the structure of a part of cargo handling conveyance system of 3rd Embodiment of this invention.

(First embodiment)
Hereinafter, a work transportation system 1 including the cargo handling system according to the first embodiment of the present invention will be described.
First, the structure of the workpiece transport system 1 of the present embodiment will be described with reference to FIGS. 1 to 7. FIG. 1 is an overall view showing a workpiece transport system 1. FIG. 2 is a partial cross-sectional view showing the configuration of the unloading unit 30 of the work transport system 1. FIGS. 3A and 3B are schematic diagrams illustrating a partial configuration of the temporary storage unit 37 in the workpiece transport system 1. FIG. 4 is a schematic diagram illustrating a partial configuration of the temporary storage unit 37. FIG. 5 is a plan view showing the stacking unit 50 in the work transport system 1. FIG. 6 is a front view showing the yard crane 55. 7A is a side view showing the integrated vehicle 60, and FIG. 7B is a plan view showing the vibration device 63. FIG. 8 is a perspective view showing the configuration of the container 70 in the workpiece transport system 1.

  The work transport system 1 includes a ship 10 and a container terminal (load handling system) 20, and transports the work W into the container terminal 20 by the ship 10.

  The ship 10 is, for example, a bulk carrier that loads and transports workpieces W in bulk, and a plurality of cargo holds 12 for storing the workpieces W are formed on the hull 11. Note that the vessel 10 may be any vessel as long as it is a bulk carrier capable of transporting the workpiece W.

  The container terminal (load handling system) 20 includes a ship mooring unit 21, an unloading unit 30, a stacking unit 50, a stacking vehicle (transport vehicle, first transport unit, fourth transport unit) 60, and a container (container) 70. And a carry-out vehicle (third transport means) 80 and a vehicle yard 22.

  The ship mooring part 21 moores the ship 10 to the container terminal 20, and the ship mooring part 21 is formed with a quay for landing the ship 10.

  The unloading part 30 is provided in the vicinity of the ship mooring part 21. The loading / unloading unit 30 is provided with a landing device 31 for landing the workpieces W stacked on the ship 10 onto the container terminal 20.

  As shown in FIG. 2, the landing device 31 includes a traveling mechanism 32, an arm portion 33, and a suction conveyance mechanism 34.

The traveling mechanism 32 moves the arm part 33 along the quay of the ship mooring part 21. The traveling mechanism 32 includes a rail 32A that extends in a direction along the quay of the ship mooring unit 21, and a wheel unit 32B that travels on the rail 32A.
The wheel part 32B is rotated by, for example, a motor or the like, and in this embodiment, the wheel part 32B has a metal wheel.
By the traveling mechanism 32, the landing device 31 can travel along the quay of the ship mooring portion 21.

  The arm portion 33 guides a suction nozzle 35 (to be described later) of the suction conveyance mechanism 34 to the inside of the hold 12 of the ship 10. The arm portion 33 includes a rotation shaft 33A that rotates about a rotation center axis O1 that faces in the vertical direction, and a boom 33B that is connected to the rotation shaft 33A and extends to the side of the rotation shaft 33A. Yes.

  The rotation shaft 33A rotates the boom 33B by rotating around the rotation center axis O1. The landing shaft 31A can move the boom 33B from the quay of the ship mooring portion 21 toward the ship 10 by the rotation shaft 33A.

  The boom 33B is attached to the rotating shaft 33A so as to swing up and down with the connecting portion with the rotating shaft 33A as the center of swinging. The boom 33B is swung up and down within a certain range with respect to the horizontal direction by a driving means (not shown) so that the height of the tip of the boom 33B can be changed.

  As shown in FIGS. 1 and 2, the suction conveyance mechanism 34 communicates with a suction nozzle 35 attached to one end of the arm portion 33, a conveyance pipeline 36 communicated with the suction nozzle 35, and the conveyance pipeline 36. And a temporary storage part 37 provided on the unloading part 30.

  The suction nozzle 35 sucks the work W inside the hold 12 and moves the work W out of the hold 12. The suction nozzle 35 is suspended from the tip of the boom 33B. The suction nozzle 35 is formed in a cylindrical shape and has a length that allows the opening to reach the bottom of the hold 12.

  The conveyance pipe line 36 is a pipe for conveying the workpiece W sucked by the suction nozzle 35 shown in FIG. 2 to the temporary storage unit 37 as shown in FIG. The conveyance pipeline 36 is formed in a cylindrical shape, and the conveyance pipeline 36 communicates with the suction nozzle 35 and extends toward the loading / unloading portion 30 side. Further, the conveyance pipeline 36 extends to the temporary storage unit 37 along the ground of the unloading unit 30.

  As shown in FIGS. 3 (A), 3 (B), and 4, the temporary storage unit 37 accommodates and temporarily stores the work W transported through the transport pipe 36, which will be described later. It is transferred to the container 70. The temporary storage unit 37 includes a branch line 38 that is in communication with the conveyance line 36, an adjustment valve 39 that is provided in the branch line 38, and a hopper 40 that is in communication with the branch line 38. .

The branch pipe 38 is provided below the transport pipe 36 and is formed to branch so that the number of pipes increases from the transport pipe 36 toward the hopper 40 side. In the present embodiment, the branch pipeline 38 has one opening 38A provided on the transport pipeline 36 side and eight openings 38B1 to 38B8 provided on the hopper 40 side. Further, the branch pipe 38 is first branched into two from the transport pipe 36 toward the hopper portion 40, and each pipe is branched into two at the tip of the two branches. Each branch is bifurcated.
The size of the inner diameter of the branch pipe 38 can be appropriately adjusted in order to adjust the flow rate of the workpiece W conveyed through the inside of the branch pipe 38. In the present embodiment, the size of the inner diameter of the branch pipeline 38 is substantially the same at any location of the branch pipeline 38. Moreover, it is preferable that the shape of the branch part of the branch pipe line 38 is a shape which can divide | segment the workpiece | work W substantially equally in a branch part.

  The adjustment valve 39 switches the flow path of the workpiece W at the branch portion of the branch pipe line 38. The regulating valve 39 is provided at a branching portion on the side closest to the conveyance pipeline 36 in the branch pipeline 38. As the adjustment valve 39, for example, a butterfly valve or a shutter valve that opens and closes a branching portion of the branch pipe 38 using a motor can be employed. In addition, as the adjustment valve 39, a valve for adjusting the flow rate of the granular material can be appropriately selected and employed, and the flow rate of the work W flowing to one of the pipelines is set to 0% to flow to the other flow channel. The flow rate of the workpiece W can be set to 100%. The work W may be distributed by setting the ratio of the flow rate of the work W flowing to the branch destination of the branched pipe to an appropriate ratio using the adjustment valve 39.

The hopper portion 40 is provided below the branch pipe line 38 and has eight hoppers (hoppers 41 to 48).
The hoppers 41 to 48 are formed in the same shape and the same size, and include container bodies 41A to 48A formed in a cylindrical shape, and discharge pipes 41B to 48B communicated downstream of the container bodies 41A to 48A, respectively. ing.

  The containers 41A to 48A are communicated with the openings 38B1 to 38B8 of the branch pipe line 38 disposed on the upper side, respectively. That is, in this embodiment, when the flow path of the branch pipe 38 is switched by the adjustment valve 39, the flow path toward the containers 41A to 44A and the flow path toward the containers 45A to 48A are switched. Yes.

  The discharge pipes 41B to 44B are arranged in a line at equal intervals in the horizontal direction. Further, the discharge pipes 45B to 48B are arranged in a line at equal intervals in the horizontal direction. The arrangement direction of the discharge pipes 41B to 44B and the arrangement direction of the discharge pipes 45B to 48B are parallel to each other. Further, the arrangement interval of the discharge pipes 41B to 44B is equal to the arrangement interval of the discharge pipes 45B to 48B.

  The hopper 40 is divided into a first transfer system 40A for transferring the workpiece W to the container 70 by the hoppers 41 to 44, and a second transfer system 40B for transferring the workpiece W to the container 70 by the hoppers 45 to 48. It is divided. The discharge pipes 41B to 44B of the hoppers 41 to 44 divided into the first transfer system 40A can be opened and closed synchronously, so that the workpiece W can be discharged simultaneously from the discharge pipes 41B to 44B. It has become. Further, the discharge pipes 45B to 48B of the hoppers 45 to 48 divided into the second transfer system 40B can be opened and closed synchronously. Between the first transfer system 40A and the second transfer system 40B, the opening / closing operations do not need to be synchronized between the discharge pipes 41B to 44B and the discharge pipes 45B to 48B.

As shown in FIGS. 1 and 5, the stacking unit 50 includes a container yard 51 in which the container 70 is stored, and a yard crane (second transport means) 55 that transports the container 70.
The container yard 51 has a substantially flat crane traveling lane 52, a storage region 53 predetermined inside the crane traveling lane 52, and a vehicle traveling path 54 on which the stacked vehicle 60 and the unloading vehicle 80 travel. Yes.

  The crane traveling lane 52 is a section provided by dividing the ground of the stacking unit 50 into a rectangular shape extending in one direction. In this embodiment, the two crane traveling lanes 52 are adjacent to each other in the short width direction. Is provided. A ground guide line 52 </ b> A for guiding the yard crane 55 in the crane traveling lane 52 is provided on one side of the crane traveling lane 52 in the short width direction.

  The storage area 53 is a rectangular section provided inside the section of the crane traveling lane 52 for storing the container 70, and has a flat ground surface. The storage area 53 is provided in an intermediate portion of the crane traveling lane 52 in the short width direction, and is provided in a range narrower than the size of the crane traveling lane 52 in the short width direction. In the present embodiment, the storage area 53 is configured such that the containers 70 are stacked and arranged so as to form a grid-like matrix in which the longitudinal direction of the crane lane 52 is a row and the short width direction is a column. .

  As schematically shown in FIGS. 1 and 5, the vehicle travel path 54 is a path for the integrated vehicle 60 and the unloading vehicle 80 to travel, and is a cargo travel path that is located in an area inside the crane travel lane 52. 54 </ b> A and a transport traveling path 54 </ b> B located in an area outside the crane traveling lane 52.

  As shown in FIG. 6, the yard crane 55 is a self-propelled crane that travels using tires, and is a tire-type portal crane (RTG, Rubber Tired Gantry crane) in the present embodiment. The yard crane 55 has a crane main body 56 formed in a gate shape, a traveling mechanism 57 attached to the lower end of the crane main body 56, and a suspension mechanism 58 attached to the upper part of the crane main body 56. The yard crane 55 of the present embodiment is, for example, run by an operator of the yard crane 55 or the container 70 is transported. In addition, as the yard crane 55, what can convey the container 70 by automatic driving | operation may be employ | adopted.

  The crane main body 56 includes leg portions 56A and 56B which are larger than the size of the storage region 53 in the width direction of the storage area 53 and smaller than the size of the crane traveling lane 52 in the width direction of the crane, and leg portions It has the beam part 56C spanning the upper end of 56A and 56B.

  The travel mechanism 57 includes a rubber tire 57A and a drive mechanism (not shown) that rotates the tire 57A. The traveling mechanism 57 allows the yard crane 55 to travel around a plurality of container yards 51 (see FIG. 1) or freely travels within the container terminal 20.

  The suspension mechanism 58 is provided on the beam portion 56C so as to be able to advance and retract along the beam portion 56C. The hanging mechanism 58 moves the holding portion 58A holding the container 70, the hanging wire 58B for hanging the holding portion 58A, and the holding portion 58A connected to the hanging wire 58B along the beam portion 56C. And a trolley 58C.

The collective vehicle 60 is a transport vehicle that transports the container 70 (see FIG. 7) within the container terminal 20 (see FIG. 1).
As shown in FIG. 7A, the integrated vehicle 60 includes a traveling device 61, a placement unit 62 connected to the traveling device 61, and a vibration device 63 placed on the placement unit 62. ing. In the present embodiment, the container terminal 20 is provided with a plurality of integrated vehicles 60. The number of stacking vehicles 60 depends on the amount of work W to be unloaded from the ship 10 (see FIG. 1), the number of yard cranes 55 provided in the stacking unit 50, the number of transfer systems in the temporary storage unit 37, and the like. Can be determined as appropriate.

  For example, when one yard crane 55 is provided per container yard 51, there are two transfer systems in the temporary storage unit 37, and when the work W is loaded and unloaded from the ship 10 using one container yard 51, Since there are three places where the collective vehicle 60 stops, for example, even if three collective vehicles 60 are provided, the frequency of occurrence of traffic congestion is low. Therefore, in such a case, the number of the stacked vehicles 60 may be about three, four, or five. Of course, a large number of integrated vehicles 60 may be operated simultaneously under appropriate traffic control.

  The traveling device 61 is driven by a driver, and travels by driving the driver by pulling the mounting portion 62 in the container terminal 20 shown in FIG. In the present embodiment, the traveling device 61 is a trailer head that connects the placement unit 62 and pulls the placement unit 62.

  The placement unit 62 places the container 70 via the vibration device 63. In the present embodiment, the placement unit 62 is a trailer that is pulled by the traveling device 61.

The vibration device 63 vibrates the container 70 (see FIG. 8) in which the workpiece W is accommodated, so that the inclination angle of the upper surface of the workpiece W accommodated in the container 70 becomes a collapse angle smaller than the repose angle. The surface of the workpiece W is leveled.
As shown in FIGS. 7A and 7B, the vibration device 63 includes a movable table 64 attached to the mounting unit 62 so as to be movable within a certain range with respect to the mounting unit 62, and a movable table. 64 and the mounting portion 62, and an actuator 65 that expands and contracts between the movable table 64 and the mounting portion 62.

  The actuator 65 is an air cylinder that expands and contracts using, for example, air pressure, and can be expanded and contracted at a constant cycle by using compressed air stored in a compressed air tank (not shown) by the power of the engine of the traveling device 61. . The actuator 65 is provided with a switch SW1 for starting the operation of the actuator 65 or stopping the operation of the actuator 65.

  As shown in FIG. 8, the container 70 accommodates the workpiece | work W inside. The container 70 is formed in a substantially rectangular parallelepiped shape, and includes a plate-like base portion 71, a wall portion 72 erected vertically from the base portion 71, and a ceiling portion 73 stretched over the wall portion 72. Yes.

  In this embodiment, a large number of containers 70 are stored in a van pool (not shown). Therefore, when the container 70 is used, the necessary quantity of containers 70 can be moved from the van pool to the container yard 51 (see FIG. 1) and used. Further, the container 70 can be stored in the stacking unit 50 by being stacked on the stacking unit 50 (see FIG. 1) in a state where the work W is accommodated therein.

In addition, the ceiling portion 73 is provided with a hatch portion 74 for receiving the workpiece W falling from the upper side of the container 70.
The hatch portion 74 includes a through hole 75 formed through the ceiling portion 73 and a lid body 76 formed to have a size capable of closing the through hole 75.

In the present embodiment, the through holes 75 are formed at the center in the short width direction of the ceiling portion 73 of the container 70, and four through holes 75 are formed at regular intervals in the longitudinal direction of the ceiling portion 73. The interval between the four through holes 75 is equal to the interval between the discharge pipes 41B to 44B and the interval between the discharge pipes 45B to 48B in the hopper portion 40 (see FIGS. 3 and 4).
Therefore, when the container 70 is disposed below the discharge pipes 41B to 44B or the discharge pipes 45B to 48B of the hopper 40, the work W is dropped into the container 70 through the four through holes 75. It can be accommodated (see FIG. 3).

The lid 76 is connected to the ceiling portion 73, and opens the through hole 75 or closes the through hole 75. That is, when the workpiece W is accommodated in the container 70 through the through hole 75, the lid body 76 is opened to open the through hole 75, and when the workpiece W is stored in the stacking unit 50, the lid body 76 is closed. Thus, the through hole 75 is closed. Thereby, it can reduce that the workpiece | work W is influenced by the weather conditions outside the container 70, etc.
Hereinafter, the container 70 in which the work W is not accommodated in the inside is referred to as “empty container 70A”, and the container 70 in which the work W is accommodated in the inside is distinguished as “actual container 70B”.

As shown in FIG. 1, the unloading vehicle 80 conveys the workpiece W together with the container 70 to a consumer 100 that consumes the workpiece W after the workpiece W is unloaded from the ship 10 and accumulated in the stacking unit 50. is there. As the unloading vehicle 80, for example, a truck or a towing vehicle that transports the container 70, or an automatic transport cart that transports the workpiece W together with the container 70 between the container terminal 20 and the consumption destination 100 is appropriately selected and adopted. Can do.
In the present embodiment, the unloading vehicle 80 is driven by a driver who drives the unloading vehicle 80.

  The vehicle yard 22 is a flat section provided in the container terminal 20 in order for the stacking vehicle 60 and the unloading vehicle 80 to stand by. The vehicle yard 22 is preferably arranged in the vicinity of the stacking unit 50.

  The operation | movement at the time of use of the workpiece transport system 1 provided with the container terminal (load handling system) 20 of this embodiment of the structure demonstrated above is demonstrated. FIG. 9 is a flowchart showing an operation at the time of using the container terminal (load handling system) 20. 10 to 12 are operation explanatory views for explaining the operation at the time of using the container terminal (cargo handling system) 20.

  When the container terminal 20 is notified that the vessel 10 is going to call the container terminal 20, the container terminal 20 performs a loading step S <b> 1 for loading the empty container 70 </ b> A into the storage area 53 of the container yard 51.

  In the carry-in process S <b> 1, the unloading vehicle 80 transports the plurality of empty containers 70 </ b> A from the van pool of the container terminal 20 to the container yard 51. At this time, the unloading vehicle 80 transports the plurality of empty containers 70 </ b> A so as to have a volume equal to or larger than the total amount of works W stored in the ship 10 arriving at the container terminal 20. The stacking vehicle 60 may transport the empty container 70A from the van pool to the container yard 51.

  When the plurality of empty containers 70A are transported to the container yard 51, the yard crane 55 transports the empty containers 70A from the carry-out vehicle 80 (or the accumulation vehicle 60) to the storage area 53 (see, for example, FIG. 6). In this embodiment, empty containers 70A are stacked in four stages in the storage area 53, and six empty containers 70A are stacked in the row direction of the storage area 53 and four stages in the height direction. Thus, in the carrying-in process S1, 24 empty containers 70A are arranged in one row of the storage area 53.

Moreover, as shown in FIG. 5, in the storage area 53, one row located at one end in the longitudinal direction of the crane traveling lane 52 becomes an empty space 53A by not arranging the empty container 70A. In the present embodiment, 24 containers 70 can be arranged in the open space 53A.
The carry-in process S <b> 1 is completed as described above, and the container terminal 20 waits until the ship 10 loaded with the work W arrives at the container terminal 20.

When the ship 10 arrives at the container terminal 20, the unloading process S2 starts.
The unloading step S <b> 2 is a step of unloading the workpiece W from the ship 10.
In the unloading step S <b> 2, as shown in FIG. 1, the ship 10 is moored in the ship mooring unit 21, and the workpiece W is taken out from the hold 12 using the landing device 31 of the unloading unit 30. At this time, the workpiece W taken out from the hold 12 is sent to the hopper 40 of the temporary storage unit 37 through the inside of the conveyance pipeline 36.

  As shown in FIGS. 3A, 3B, and 4, in the hopper portion 40, first, the flow path is switched to the hoppers 41 to 44 side by the adjustment valve 39. Then, the workpiece | work W sent through the inside of the branch pipe line 38 flows in into the hoppers 41 thru | or 44, and is stored inside the accommodating bodies 41A thru | or 44A. Here, the flow rate of the work W flowing into the containers 41A to 44A is substantially equal. When the workpieces W are stored in the accommodating bodies 41A to 44A up to a predetermined amount, the adjustment valve 39 is operated to switch to the flow path from the transport pipeline 36 to the hoppers 45 to 48. Then, the workpiece W flows into the hoppers 45 to 48.

  In addition, it is not necessarily an operation | movement which makes the hopper 41 thru | or 44 store the workpiece | work W to the above-mentioned predetermined amount. For example, if the total amount of workpieces W in the hoppers 41 to 44 is equal to or greater than the volume of the container 70, the flow path may be switched from the hoppers 41 to 44 to the hoppers 44 to 48 by the adjusting valve 39. In this case, the workpieces W can be stored in the hoppers 45 to 48 earlier than when waiting for the workpieces W to be fully stored in the hoppers 41 to 44. As a result, the first transfer system 40A using the hoppers 41 to 44 and the second transfer system 40B using the hoppers 45 to 48 can be used together at an early stage.

  Subsequently, a loading step S3 for loading empty containers 70A accumulated in the storage area 53 of the accumulation unit 50 onto the accumulation vehicle 60 is started. In the loading step S3, it is not essential to start after the work W is stored in the hoppers 41 to 48 to the full. For example, it may be started at any point in time from when the work W is started to be taken out from the hold 12 of the ship 10 to when the work W is stored in the hoppers 41 to 48.

  In the loading step S <b> 3, first, the stacking vehicle 60 waiting in the vehicle yard 22 shown in FIG. 1 moves from the vehicle yard 22 to the container yard 51. At this time, the collective vehicle 60 moves in a line in which all the collective vehicles 60 waiting in the vehicle yard 22 enter the vehicle travel path 54 of the container yard 51 and stop in a line in the vehicle travel path 54. .

Subsequently, as shown in FIG. 10, the yard crane 55 lifts one empty container 70 </ b> A stacked in the storage area 53 and places the empty container 70 </ b> A on the movable platform 64 of the stacking vehicle 60.
The empty container 70A lifted by the yard crane 55 in the loading step S3 can be appropriately selected from the empty containers 70A arranged in the row closest to the empty space 53A.

In the present embodiment, one empty container 70A is loaded on the movable platform 64 of the plurality of stacking vehicles 60 in the loading step S3. At this time, it is preferable to load the empty container 70 </ b> A first from the stacked vehicle 60 positioned on the leading side in the traveling direction on the vehicle travel path 54. Alternatively, the stacked vehicles 60 may be departed from the vehicle travel path 54 in the order in which the empty containers 70A are loaded.
Thus, the loading step S3 is completed, and the empty container transfer step S4 is started.

The empty container transfer step S4 is a step of transferring the empty container 70A, which is stacked and arranged in the container yard 51 of the stacking unit 50, to the hopper unit 40 by the stacking vehicle 60.
In the empty container transfer step S4, the integrated vehicle 60 moves from the vehicle travel path 54 to the temporary storage unit 37 as shown in FIG. As shown in FIG. 3A, in the hopper unit 40, for example, the leading integrated vehicle 60 stops under the hoppers 41 to 44 of the first transfer system 40A, and the second integrated vehicle 60 transfers to the second transfer vehicle. Stop under the hoppers 45 to 48 of the system 40B.
Note that the third and subsequent stacked vehicles 60 stop in a row or in a predetermined arrangement near the hopper 40.
The empty container transport process S4 is thus completed, and the transfer process S5 is started.

The transfer step S5 is a step of transferring the workpiece W from the hoppers 41 to 48 into the empty container 70A conveyed to the hopper unit 40.
In the transfer step S5, as shown in FIGS. 3A and 3B, after the integrated vehicle 60 stops under the hoppers 41 to 44 of the first transfer system 40A, the ceiling portion of the empty container 70A is obtained. The lid 76 of the hatch portion 74 provided at 73 is opened manually, for example. Further, the discharge pipes 41B to 44B are connected to and connected to the through holes 75 (see FIG. 8), for example, manually. Similarly, in the second transfer system 40B, all the lids 76 of the hatch portions 74 provided on the ceiling portion 73 of the empty container 70A are opened, and the discharge pipes 45B to 48B are respectively connected to the through holes 75 (see FIG. 8). Connect to and communicate with.

  Thereafter, the discharge pipes 41B to 44 of the hoppers 41 to 44 are simultaneously opened, and the discharge pipes 45B to 48B of the hoppers 45 to 48 are simultaneously opened. Then, the workpiece W falls from the containers 41A to 44A and the containers 45A to 48A into the empty container 70A.

  Inside the empty container 70A, at four locations that are spaced apart in the longitudinal direction of the empty container 70A, the inclination angle is the repose angle of the work W, and the four through-holes 75 each have the highest mountain-like work. W is served.

  After the workpiece W starts to fall into the empty container 70A, the switch SW1 (see FIG. 7B) of the vibration exciter 63 is turned on manually, for example. Then, the movable table 64 on the placement unit 62 is reciprocated by the actuator 65. Thereby, the empty container 70A loaded on the movable platform 64 vibrates, and the vibration of the empty container 70A is transmitted to the work W inside the empty container 70A.

When vibration is transmitted to the workpiece W, the workpiece W accommodated in the empty container 70A vibrates and collapses to a shape having a collapse angle smaller than the repose angle. This creates a gap through which the workpiece W can flow directly under the through hole 75 (see FIG. 8).
For this reason, the filling rate of the work W into the empty container 70A can be increased by causing the work W to flow into the empty container 70A while vibrating the empty container 70A.

When the workpiece W flows into the empty container 70A by a predetermined amount, the discharge pipes 41B to 44B of the hoppers 41 to 44 and the discharge pipes 45B to 48 of the hoppers 45 to 48 are closed. Further, for example, the lid 76 of the hatch portion 74 of the actual container 70B is closed manually. Thereby, the empty container 70A becomes the actual container 70B in which the workpiece W is accommodated.
Thus, the transfer process S5 is completed, and the actual container transfer process S6 is started.

The actual container transfer process S <b> 6 is a process of transferring the actual container 70 </ b> B from the hopper unit 40 to the stacking unit 50 by the stacking vehicle 60.
In the actual container transporting step S6, the integrated vehicle 60 is the hopper from the first transfer system 40A and the second transfer system 40B of the hopper 40 shown in FIG. Depart from the part 40. The stacking vehicle 60 loaded with the actual containers 70B moves from the temporary storage unit 37 to the container yard 51 of the stacking unit 50 as shown in FIG. The collective vehicle 60 that has arrived at the container yard 51 enters the vehicle traveling path 54 of the container yard 51 and stops near the stop position of the collective vehicle 60 when the empty container 70A is loaded in the above-described loading step S3. .
This is the end of the actual container transport step S6, and the container lowering step S7 is started.

The container lowering step S <b> 7 is a step of dropping the actual container 70 </ b> B from the stacking vehicle 60 and placing it in the storage area 53.
In the container lowering step S7, as shown in FIGS. 11A and 11B, the yard crane 55 lifts the actual container 70B loaded on the stacking vehicle 60, and the actual container 70B enters the empty space 53A of the storage area 53. Down. The yard crane 55 accumulates the actual containers 70 </ b> B transported to the container yard 51 by the plurality of accumulation vehicles 60 so as to form a matrix similar to that in which the empty containers 70 </ b> A are accumulated in the storage area 53.

In the present embodiment, 24 real containers 70B (six containers 70 can be placed per row and containers 70 can be stacked in four rows in each row) can be placed in the empty space 53A. it can. Therefore, if the number of actual containers 70B transported to the stacking unit 50 by the stacking vehicle 60 is 24 or less, the actual containers 70B are placed in the storage area 53 without evacuating the empty containers 70A placed in the storage area 53. be able to.
This is the end of the container lowering step S7.

  When the container lowering step S7 is completed, the integrated vehicle 60 in which the actual container 70B is lowered continues to stop on the spot. Further, the yard crane 55 having lowered the actual container 70B into the empty space 53A lifts the empty container 70A placed in a section adjacent to the empty space 53A in the storage area 53 and loads it on the stacking vehicle 60 again. That is, the above-described container loading step S3 is started again.

  Thus, in the stacking vehicle 60, the actual container 70B is replaced with the empty container 70A. That is, an accumulation vehicle (first conveyance means) that conveys the container 70 from the unloading unit 30 to the accumulation unit 50, and an empty container 70A is loaded after the actual container 70B is lowered, and the empty container 70A is conveyed to the unloading unit 30. The integrated vehicle (fourth transport means) is also used by the same integrated vehicle 60.

  Then, the stacking vehicle 60 on which the empty container 70A is loaded again repeats the empty container loading step S3, the empty container transfer step S4, the transfer step S5, the actual container transfer step S5, and the container lowering step S7 in this order. As a result, the empty container 70A placed in the storage area 53 is replaced with the actual container 70B.

  At this time, the empty space 53A in which the empty container 70A has not been placed in the carry-in process S1 moves to the side where the empty container 70A has been placed in the storage area 53 by placing the actual container 70B in the empty space 53A. For this reason, the empty space 53A is always located in a section adjacent to the section where the empty container 70A is placed. As a result, the distance the yard crane 55 travels on the crane travel lane 52 can be shortened in order to lift the empty container 70A after placing the actual container 70B in the empty space 53A.

As shown in FIG. 1, when the workpiece W is unloaded to the consumption destination 100 in order to use the workpiece W at the consumption destination 100, the unloading vehicle 80 waiting in the vehicle yard 22 moves from the vehicle yard 22 to the container yard 51. To do.
The carry-out vehicle 80 stops at a position in the vicinity of the actual container 70B on the vehicle travel path 54. Subsequently, the yard crane 55 transports the actual container 70 </ b> B placed in the storage area 53 from the storage area 53 to the carry-out vehicle 80 and loads the real container 70 </ b> B on the carry-out vehicle 80.
The unloading vehicle 80 loaded with the actual container 70 </ b> B moves to the consumer 100. Further, the work W is dropped from the actual container 70B at the consumption destination 100 (here, the actual container 70B becomes an empty container 70A).
The empty container 70A after the work W is lowered at the consumption destination 100 is transported to the van pool, for example, by the carry-out vehicle 80 and stored in the van pool.

  Note that a plurality of yard cranes 55 may be arranged in the container yard 51 when the work W needs to be carried out to the consumer while the work W is being unloaded from the ship 10. For example, a plurality of yard cranes 55 whose roles are divided into a yard crane 55 that exclusively performs the container loading step S3 and the container lowering step S7 and a yard crane 55 that exclusively loads the actual container 70B on the unloading vehicle 80 are combined. One container yard 51 can be arranged. In this case, since the empty container 70A and the actual container 70B are separately arranged at positions separated in the longitudinal direction of the storage region 53, the possibility that the yard cranes 55 interfere with each other is low. As a result, the system that transports the workpiece W from the ship 10 to the stacking unit 50 and the system that transports the workpiece W from the stacking unit 50 to the consumer 100 can be operated independently of each other.

  As described above, according to the container terminal (load handling system) 20 of the present embodiment, the work W is placed in the storage area 53 of the container yard 51 using a plurality of containers 70 that can be transported by the stacking vehicle 60 and the unloading vehicle 80. Can be stored. As a result, since there is no need to construct a large silo or the like for storing the work W, the cost required for installing and operating the container terminal 20 can be reduced.

  In addition, there is no need to build specialized silos or other facilities to store the workpieces W, so the effort that occurs when changing the container terminal application to another application or changing the container terminal layout And cost can be reduced.

  Further, the actual container 70B is placed near the position where the plurality of empty containers 70A initially arranged in the stacking unit 50 are taken out, and the empty containers 70A are sequentially replaced with the actual containers 70B. For this reason, the time taken for the yard crane 55 to travel in the stacking unit 50 can be shortened, and the reduction in cargo handling efficiency in the container terminal 20 can be reduced.

(Second Embodiment)
Next, a cargo handling system according to a second embodiment of the present invention will be described. In the following embodiments, components having the same configurations as those of the container terminal (load handling system) 20 and the workpiece transport system 1 described in the first embodiment are denoted by the same reference numerals. The description is omitted.
FIG. 13A is a plan view showing the container terminal (load handling system) 120 of this embodiment, and FIGS. 13B and 13C show the operation when the container terminal (load handling system) 120 is used. It is operation | movement explanatory drawing for demonstrating.

  As shown in FIG. 12A, the container terminal 120 includes a storage area 153 in the container yard 51 instead of the storage area 53. In the present embodiment, the arrangement of the containers 70 in the storage area 153 of the container yard 51 is different from the arrangement of the containers 70 in the storage area 53 described in the first embodiment.

  In the storage area 153, one line section closest to the vehicle traveling path 54 in the container yard 51 including the storage area 153 is an empty space 153A in which no empty container 70A is placed.

  As shown in FIG. 12B, in the present embodiment, in the container loading step S3 described in the first embodiment, the yard crane 55 loads the empty container 70A on the side near the vehicle travel path 54 onto the stacking vehicle 60. To do. As shown in FIG. 12C, in this embodiment, in the container lowering step S7 described in the first embodiment, the yard crane 55 places the actual container 70B in the empty space 153A.

Similarly to the container terminal 20 described in the first embodiment, the empty container 70A disposed in the storage area 153 is replaced with the actual container 70B, and the actual container 70B is changed to the storage area 153. Can be integrated.
Further, when the empty container 70A is arranged in the storage area 153 as in the present embodiment, after placing the actual container 70B in the empty space 153A, the empty container 70A is simply moved by moving the trolley 58C without running the yard crane 55. The stacked vehicle 60 can be efficiently loaded.
The arrangement of empty containers 70A shown in the present embodiment is such that the number of containers 70 arranged in the row direction in the storage area 153 is smaller than the number of containers 70 arranged in the column direction in the storage area 153. The number of containers 70 that can be accommodated in the storage area 153 can be increased compared to the arrangement of empty containers 70A in the storage area 53 described in the first embodiment.

(Third embodiment)
Hereinafter, a container terminal (a cargo handling system) 220 according to a third embodiment of the present invention will be described with reference to FIG. FIG. 14 is a schematic diagram illustrating a configuration of the temporary storage unit 237 in the container terminal 220 of the present embodiment.

  As shown in FIG. 13, in this embodiment, the container terminal 220 includes the temporary storage unit 237 instead of the temporary storage unit 37 described in the first embodiment, and the container terminal 20 of the first embodiment. The configuration is different.

  The temporary storage part 237 is provided inside the hopper part 40 having the hoppers 41 to 48, the branch pipe line 38 communicating with the hopper part 40 and the transport pipe line 36, the adjusting valve 39, and the branch pipe line 38, respectively. The regulating valve 239A, the regulating valve 239B, the regulating valve 239C, the regulating valve 239D, the regulating valve 239E, and the regulating valve 239F (hereinafter, may be referred to as “regulating valves 239A to 239F”).

  The regulating valves 239A to 239F are respectively provided at the branching portions of the branching pipeline 38 on the downstream side in the direction in which the workpiece W flows in the branching pipeline 38 from the regulating valve 39.

The adjusting valve 239A adjusts the ratio between the flow rate of the work W flowing from the adjusting valve 39 side toward the hoppers 41 and 42 and the flow rate of the work W flowing from the adjusting valve 39 side toward the hoppers 43 and 44. It is.
The adjustment valve 239B adjusts the ratio between the flow rate of the workpiece W flowing through the adjustment valve 239A toward the hopper 41 and the flow rate of the workpiece W flowing through the adjustment valve 239A toward the hopper 42. It is.
The adjusting valve 239C adjusts the ratio between the flow rate of the work W flowing through the adjusting valve 239A toward the hopper 43 and the flow rate of the work W flowing through the adjusting valve 239A toward the hopper 44. It is.

  The amount of the work W flowing into each of the hoppers 41 to 44 in the first transfer system 40A can be individually adjusted by the adjusting valve 239A, the adjusting valve 239B, and the adjusting valve 239C.

The adjustment valve 239D adjusts the ratio between the flow rate of the workpiece W flowing from the adjustment valve 39 side toward the hoppers 45 and 46 and the flow rate of the workpiece W flowing from the adjustment valve 39 side toward the hoppers 47 and 48. It is.
The regulating valve 239E adjusts the ratio between the flow rate of the workpiece W flowing through the regulating valve 239D toward the hopper 45 and the flow rate of the workpiece W flowing through the regulating valve 239D toward the hopper 46. It is.
The adjustment valve 239F adjusts the ratio between the flow rate of the work W flowing through the adjustment valve 239D toward the hopper 47 and the flow rate of the work W flowing through the adjustment valve 239D toward the hopper 48. It is.

  The amount of the work W flowing into each of the hoppers 45 to 48 in the second transfer system 40B can be individually adjusted by the adjusting valve 239D, the adjusting valve 239E, and the adjusting valve 239F.

  According to such a configuration, since the amount of the work W flowing into each of the hoppers 41 to 48 can be individually adjusted, it is possible to prevent the amount of the work W accommodated in the hoppers 41 to 48 from being biased.

As mentioned above, although embodiment of this invention was explained in full detail with reference to drawings, the concrete structure is not restricted to this embodiment, The design change etc. of the range which does not deviate from the summary of this invention are included.
For example, in each of the above-described embodiments, an example in which the yard crane 55 is operated by an operator is shown. However, the present invention is not limited to this, and a remotely operated crane including a control unit that performs automatic operation is used as a yard crane. It can also be adopted.

  Further, in each of the above-described embodiments, an example in which the integrated vehicle 60 and the unloading vehicle 80 are operated by the driver is shown. However, the present invention is not limited to this, and an automatic conveyance carriage provided with a control unit that performs automatic driving. Can also be employed as an integrated vehicle and a carry-out vehicle.

DESCRIPTION OF SYMBOLS 1 Work transportation system 10 Ship 11 Hull 12 Ship hold 20, 120, 220 Container terminal (load handling system)
DESCRIPTION OF SYMBOLS 21 Ship mooring part 22 Vehicle yard 30 Unloading part 31 Landing device 32 Traveling mechanism 33 Arm part 33A Rotating shaft 33B Boom 34 Suction conveyance mechanism 35 Suction nozzle 36 Conveyance line 37 Temporary storage part 38 Branching line 39 Adjustment valve 40 Hopper part 40A First transfer system 40B Second transfer system 41 Hopper 41A container 41B Discharge pipe 42 Hopper 43 Hopper 44 Hopper 45 Hopper 45A container 45B Discharge pipe 46 Hopper 47 Hopper 48 Hopper 50 Stacking part 51 Container yard 52 Crane lane 53 Storage Area 54 Vehicle Traveling Path 55 Yard Crane 56 Crane Body 56A Leg 56B Leg 56C Beam 57 Traveling Mechanism 58 Suspension Mechanism 60 Integrated Vehicle 61 Traveling Device 62 Mounting Unit 63 Excitation Device 64 Movable Stand 65 Cutout 70 Container 70A Empty container 70B Full container 71 Base 72 Wall part 73 Ceiling part 74 Hatch part 75 Through-hole 76 Lid 80 Transport vehicle 153 Storage area 237 Temporary storage part 239A, 239B, 239C, 239D, 239E, 239F Regulating valve W Work S1 Loading process S2 Loading and unloading process S3 Loading process S4 Empty container transport process S5 Transfer process S6 Actual container transport process S7 Container unloading process

Claims (11)

A cargo handling transport system for transporting a work consumed at a consumer from a ship to the consumer,
An unloading unit for unloading the workpieces stacked on the ship from the ship;
A container in which the work loaded and unloaded from the ship by the loading and unloading unit is housed;
A stacking unit for stacking a plurality of the containers by providing an empty space in which at least one container can be placed;
First conveying means for conveying the container from the unloading unit to the stacking unit;
Second transport means for placing the container transported by the first transport means on the stacking unit;
Third transport means for transporting the container in which the workpiece is stored from the stacking unit to the consumption destination;
A fourth conveying means for conveying the container in which the workpiece is not accommodated to the unloading unit;
Equipped with a,
The unloading part accommodates the work in the container,
The first conveying means conveys the container in which the workpiece is accommodated to the stacking unit,
In the stacking unit, a plurality of the containers in a state in which the work is accommodated are arranged and arranged.
A cargo handling system characterized by that.   The cargo handling and conveying system according to claim 1, wherein the fourth conveying means is the first conveying means after the container is lowered in the stacking unit by the second conveying means. The unloading part is
A hopper for storing the workpiece;
One end is connected to the hopper and is opened inside the hopper, the other end is opened toward the container, and a pipe line through which the workpiece flows,
An adjustment valve that is provided inside the pipe and adjusts the flow rate of the work that flows toward the hopper;
Have
The opening of the pipe line on the side connected to the hopper is one,
The pipeline is formed by branching into a plurality as it goes from the hopper to the container,
The cargo handling system according to claim 1 or 2, wherein there are a plurality of openings of the pipe line directed to the container. The container has a ceiling on the upper side,
The cargo handling and conveying system according to claim 3, wherein a plurality of through holes for introducing the workpiece dropped from the opening at the other end of the pipe line are formed in the ceiling portion. A plurality of sets of the hopper, the pipe line, and the regulating valve are provided,
The pipe line is arranged to be able to communicate with the plurality of through holes of each of the plurality of containers arranged side by side,
The material handling conveyance according to claim 4, wherein the pipe is configured to drop the work on the plurality of containers arranged side by side to accommodate the work in the container. system. The said through-hole is provided with four per said container, The cargo handling conveyance system as described in any one of Claim 4 or 5 characterized by the above-mentioned. Prior to unloading the work from the ship, a plurality of empty containers that do not contain the work are accumulated in the accumulation unit,
The said 2nd conveyance means mounts the said container conveyed by the said 1st conveyance means in the said empty space, and loads the said empty container from the said accumulation part to the said 4th conveyance means. The cargo handling conveyance system as described in any one of from 6. The second conveying means has a traveling mechanism that travels in a linear direction in the stacking unit,
The stacking unit can place a plurality of containers side by side in a direction perpendicular to the traveling direction of the second transport unit, and can arrange a plurality of containers side by side along the traveling direction of the second transport unit. Provided,
The cargo handling and conveying system according to claim 7, wherein the empty space is located at an end of the stacking unit in a traveling direction of the second conveying means before the work is unloaded from the ship. . The stacking unit can place a plurality of the containers in a direction along the traveling direction of the second conveying means, and can arrange the plurality of containers side by side along a direction orthogonal to the traveling direction of the second conveying means. Provided in
The said empty space is located in the edge part of the said stacking | stacking part in the direction orthogonal to the running direction of a said 2nd conveying means, before carrying out the said workpiece | work from the said ship. Cargo handling system. The first conveying means includes
The cargo handling and conveying system according to any one of claims 1 to 9, further comprising a vibrating unit that vibrates the container. A loading step of loading the empty container from a stacking unit in which empty containers that do not store the work are stacked, into a transport vehicle that transports the container;
After the loading step, an empty container transfer step of transferring the empty container by the transfer vehicle to a loading / unloading unit for loading and unloading the workpiece from a ship in which the workpieces are stacked in bulk,
A transfer step of transferring the workpiece from the unloading part to the empty container transferred by the empty container transfer step;
An actual container transfer step of transferring the actual container onto which the workpiece has been transferred in the transfer step from the unloading unit to the stacking unit by the transfer vehicle;
A container lowering step of lowering the actual container transported in the actual container transporting process from the transport vehicle in the stacking unit and placing the actual container in the stacking unit;
With
By the container lowering step, a plurality of the actual containers are arranged in alignment with the accumulation part,
The loading / unloading method according to claim 1, wherein after the container lowering step, the loading step is started with respect to the transport vehicle in which the actual container is lowered in the container lowering step.

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