Bulk handling crane receiving system

Abstract

To provide a reception system for a bulk handling crane which unloads a bulk from a carrying-in truck with the bulk loaded thereon using a reception crane of a front stage operating through human mediation and then smoothly transfers the bulk to an automatic crane of a rear stage.SOLUTION: A slope SL is provided between a reception crane MC of a front stage and an automatic crane AC of a rear stage. The height of the slope SL on the reception crane MC side is set near the top surface of a cargo loading constituent CN disposed on a load-carrying platform of a carrying-in truck TR. A slope descending toward the automatic crane AC side is provided, and the slope angle is set such that a bulk dropped on the slope SL from the reception crane MC slides and drops to the automatic crane AC side. Thus, the bulk is moved through the slope SL from an operation area of the reception crane MC to an operation area of the automatic crane AC.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a bulk material handling crane receiving system in which bulk material delivered by truck is unloaded using a receiving crane and the unloaded bulk material is operated by an automatic crane. [Background technology]

[0002] Conventionally, a system has been proposed and adopted in which bulk materials (wood chips, grain, coal, lime, iron scrap, slag, etc.) are loaded into a container on the bed of a truck, the bulk materials are unloaded using a receiving crane, and the unloaded bulk materials are stored in a storage yard using an automatic crane or delivered to the next process (see, for example, Patent Document 1). In this system, from a safety standpoint, it is required that the movement of the automated crane be restricted to prevent mixing of automated cranes with human-operated trucks and workers, while also ensuring that the automated crane can achieve high operating efficiency under these movement restrictions. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 9-40369 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, the above-mentioned Patent Document 1 introduces a technology in which, when receiving bulk materials from a truck, a dedicated receiving crane is used to unload the bulk materials from the truck into a bucket, and the bucket is then transferred to an automated area by a cart, thereby separating the automated crane from the manned area where the truck enters, and allowing the automated crane to operate continuously.However, with this method, a cart is required to connect the manned area and the automated area, making the entire system complex and resulting in high equipment costs.

[0005] In view of the problems associated with the above-mentioned conventional systems, the present invention aims to provide a bulk material handling crane receiving system in which bulk materials are unloaded from an incoming truck loaded with bulk materials by a front-stage receiving crane operated by human intervention, and then smoothly handed over to a rear-stage automatic crane. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the bulk material handling crane receiving system of the present invention is a bulk material handling crane receiving system in which a front-stage receiving crane unloads bulk materials from an incoming truck loaded with bulk materials and hands them over to a rear-stage automatic crane, and a slope is provided between the front-stage receiving crane and the rear-stage automatic crane, and the height of the slope is such that the receiving crane side is at the height near the top surface of the cargo loading structure arranged on the loading platform of the incoming truck, and the slope is provided downward toward the automatic crane side, and the slope angle is set so that bulk materials on the slope dropped by the receiving crane will naturally slide down toward the automatic crane, so that bulk materials can be moved along the slope from the operating area of ​​the receiving crane to the operating area of ​​the automatic crane, and the side of the slope where the receiving crane is located is a no-entry area for people, and the side of the slope where the automatic crane is located is a no-entry area for people. This allows bulk materials to be moved without using power along the slope from the manned area where the receiving crane operates to the automated area where the automatic crane operates, where human entry is prohibited. Cut. In addition, the height of the slope on the side of the human access area is the same as the top surface of the cargo loading structure arranged on the loading platform of the delivery truck, so that people such as the driver of the delivery truck who are in the human access area are physically prevented from accidentally entering the automated area, thereby ensuring the separation of the automated crane and people.

[0007] In this case, the number of times the receiving crane drops bulk material at a certain position on the slope can be used to calculate and manage the pile height of the bulk material in the area surrounding the pit position where the material falls down the slope of the slope, using a preset additional value per drop. This allows the number of times the bulk items are dropped to be used to accumulate and manage the height of the pile of bulk items in the area surrounding the location of the receiving pit at the end of the slope.

[0008] Furthermore, when the receiving crane drops bulk materials at a certain position on the slope, the load value of the load meter equipped on the receiving crane is used to accumulate and manage the amount of bulk materials piled up in the surrounding area around the position of the receiving pit where the materials fall down the slope of the slope, and in addition, the pile height associated with that pile amount can be estimated and managed. This makes it possible to more reliably estimate and manage the pile height based on the number of times the receiving crane drops the pile.

[0009] When an automatic crane heads to pick up bulk material that has fallen from the slope and is in a horizontal position in a receiving pit where the bulk material is piled up, and when the automatic crane lowers its hoisting gear to land on the bulk material in that horizontal position, the deceleration position for the automatic crane's lowering can be determined from the pile height of the bulk material. This allows the lifting gear of the automatic crane to land smoothly at a low speed with a reduced hoisting speed.

[0010] In addition, when an automatic crane picks up bulk material at a location in a receiving pit where bulk material that has fallen from the slope is piled up, the height position of the automatic crane's hoisting gear at the moment the hoisting gear of the automatic crane touches down on the bulk material at that location is used as the data for the pile height of the bulk material at that location, and when the automatic crane's hoisting gear picks up the bulk material at that location, the pile height can be estimated and managed by subtracting a preset height or a height estimated from the value of the load meter equipped on the automatic crane from the updated pile height data. This eliminates errors in the estimated cumulative height of the bulk materials at a given location at the moment the automatic crane's hoisting gear is placed on top of the bulk materials at that location in order for the automatic crane to pick up the bulk materials, and also allows the data to be updated to the pile height after the automatic crane's hoisting gear has picked up the bulk materials.

[0011] In addition, the receiving pit where the bulk material that falls from the slope is piled up can be equipped with a detector to detect the pile height of the bulk material, so that the pile height of the bulk material at that location can be managed. This makes it possible to more reliably control the pile height of bulk materials at a certain location than by using a method that estimates and manages the pile height from the number of times the receiving crane drops materials at a certain location on the slope or the load value.

[0012] Furthermore, when the automatic crane is in the process of retrieving bulk materials from a receiving pit at a certain location, an electrical interlock can be provided to prevent the receiving crane from dropping materials onto a slope around that location, and a display means can be provided to indicate that the automatic crane is in the process of retrieving bulk materials. This prevents the bulk materials delivered by the receiving crane from covering the lifting device of the automatic crane.

[0013] Furthermore, to prevent the automatic crane from going to retrieve the material around the receiving pit location down the slope from the location where the receiving crane is dropping off, the automatic crane's work step can be temporarily suspended and the next step can be carried out, and once the receiving crane has finished dropping off the material around that location, the temporarily suspended work step can be carried out. This prevents the bulk materials delivered by the receiving crane from covering the lifting device of the automatic crane.

[0014] Furthermore, when the automatic crane begins to execute a work step of picking up loose material from a receiving pit at a certain location, if it is desired to deploy the receiving crane at a location up a slope from that location, an evacuation command can be sent from the receiving crane to the automatic crane, which puts the automatic crane's work step on hold and allows the receiving crane's work to take priority. This allows priority to be given to receiving delivery trucks, and prevents delivery trucks from overflowing into the site due to a backlog of delivery trucks.

[0015] In addition, the evacuation command sent to the automatic crane can be such that if the hoisting tool of the automatic crane has not yet landed on the bulk material in the receiving pit, the automatic crane will accept the evacuation command from the receiving crane, and if the hoisting tool of the automatic crane has already landed on the bulk material in the receiving pit, the automatic crane will complete the work step without accepting the evacuation command. This allows the automatic crane to be operated efficiently.

[0016] In addition, when different types of bulk goods are loaded onto each delivery truck and brought in, the stopping position of the delivery truck and the range for dropping off onto the slope can be limited for each type, so that the bulk goods can be managed by type. This allows bulk items to be handed over to the automated crane while being managed by type. [Effects of the Invention]

[0017] According to the bulk material handling crane receiving system of the present invention, it is possible to use the receiving crane to efficiently unload large quantities of bulk material in a short amount of time after it has been loaded onto a truck.In addition, by ensuring the separation of the manned area and the automated area and using a ramp to transfer bulk material between the manned area's receiving crane, which operates with human intervention, and the automated crane, which operates fully automatically in the automated area, bulk material can be moved from the manned area to the automated area without power. This ensures safety by completely separating people from automated machinery, and also enables efficient loading and unloading of bulk materials. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a front view illustrating an embodiment of a bulk material handling crane receiving system according to the present invention; FIG. [Figure 2] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0019] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the receiving system for a bulk material handling crane of the present invention will be described below with reference to the drawings.

[0020] 1 and 2 show an embodiment of a bulk material handling crane receiving system according to the present invention. The bulk goods are loaded onto a truck TR carrying an open-top container CN, and the truck TR is instructed by truck guide lights TI etc. to park alongside the slope SL. This area is entered by many HUs, such as truck TR drivers and truck guides, and bulk materials are unloaded from trucks TR by a receiving crane MC operated by a crane operator OP, making it possible to receive bulk materials without the need for an automatic crane AC to enter.An automatic crane AC cannot enter the human access area MA, so a safety measure is taken to separate it from human HUs. At this time, the receiving crane MC is in a state where the crane operator OP is involved, either by operating it manually under the operation of the crane operator OP alone, or by operating some safe processes semi-automatically under the safety supervision of the crane operator OP.

[0021] The lifting device GB of the receiving crane MC picks up the bulk material loaded on the truck TR and lifts it up slightly, reaching a height where it can move horizontally.After a short horizontal movement, it reaches the top of the slope SL, where it is dropped.The bulk material then slides down the slope of the slope SL and slides sideways from the human access area MA into the automatic area AA, where it is deposited in the receiving pit PT within the automatic area AA. Bulk materials piled up in the receiving pit PT in the automated area AA are picked up by the lifting device GA of the automated crane AC and automatically transported to the storage yard SY, etc. In this way, by using the slope SL to move bulk items from the manned area MA to the automated area AA, the system allows for lateral movement between areas without using mechanical devices such as carts or conveyors for lateral transfer.

[0022] The height of this slope SL on the side of the pedestrian access area MA is set to the same height as the top surface of the cargo loading structure arranged on the bed of the truck TR, specifically, the container CN loaded on the bed of the truck TR, and it descends from the pedestrian access area MA toward the automated access area AA, with the angle of inclination determined so that bulk goods can slide down smoothly. Here, the slope SL is preferably made by laying a liner made of steel plate, ceramic, special resin, graphite-containing gunmetal or the like, which has low sliding resistance against the bulk material and excellent wear resistance, and the inclination angle is usually set to about 20° to 45° (in this embodiment, about 30°). Since the dimensions of trucks TR brought in from outside vary, the height of the slope SL on the pedestrian access area MA side is determined based on the average approximate height. In this way, by determining the height of the access area MA side, it is possible to load and unload bulk goods in the shortest distance from trucks TR parked directly next to the slope SL. In this case, it is desirable to install the receiving crane MC at the lowest possible height. This is because the shorter the wire rope that suspends the hoisting gear GB of the receiving crane MC, the better the hoisting gear can follow the crane during horizontal movement, allowing for quicker operation and faster unloading of bulk materials. This prevents delivery trucks from being held up and overflowing from the waiting space within the facility.

[0023] The lifting device GB of the receiving crane MC at the front stage is small in size to match the dimensions of the truck TR, but the lifting device GA of the automatic crane AC at the rear stage has a lifting device size and speed that matches the transport distance and work content, making it possible to stably carry out automatic transport from the receiving pit PT to the storage yard SY and automatic transport for discharging to the next process.

[0024] Next to the slope SL, multiple trucks TR can be parked in a parallel line, and the receiving cranes MC are positioned so that unloading from the trucks TR and switching between the unloaded trucks TR and the trucks TR waiting to be unloaded can be performed simultaneously. The receiving cranes MC are positioned efficiently so that unloading work can be performed continuously.

[0025] As shown in Figure 2, if a slope SL is placed along the entire length between the building's two walls, it is physically impossible for human HUs in the human access area MA to climb over the slope SL and enter the automated area AA, completely preventing human HUs who are entering from the outside and are unaware of the equipment status, such as truck TR drivers, from accidentally entering the automated area. In this way, the slope SL completely and physically separates the movement of human HUs between the human access area MA and the automated area AA, ensuring safety.

[0026] The receiving crane MC is equipped with a position detector PS, and when bulk materials are dropped onto the slope SL at the lateral travel TS detected by the position detector PS, the materials slide down the slope SL along the line of the lateral travel position, and are deposited in the receiving pit PT at that lateral travel position. The stacking status of the receiving pit PT at that traverse position is managed by the input information and traverse position of the receiving crane MC, and based on that stacking information, the automatic crane AC is directed to the bulk cargo stacking position in the receiving pit PT and picks up the stacked bulk cargo, thereby transferring the bulk cargo from the receiving crane MC to the automatic crane AC.

[0027] When the receiving crane MC deposits bulk materials onto the slope SL within a certain range of the traverse TS, a preset height is added to the bulk material pile height at the receiving pit PT, located down the slope SL from the position range of the traverse TS, each time the receiving crane MC deposits. As the receiving crane MC deposits materials multiple times, the bulk material pile height at the receiving pit PT within the position range of the traveling TL reaches a specified height. When this specified height is reached, a command is issued to the automatic crane AC to retrieve the bulk materials at that location. When the automatic crane AC performs a landing operation on the pile of loose materials to remove the loose materials at that position, the deceleration height position for lowering the automatic crane AC is calculated from the pile height, and the automatic crane AC is smoothly decelerated to that position, landed at a low speed, and stopped. Then, the pile height at the position where the automatic crane AC lands is updated to the height at the moment of landing. Then, when the automatic crane AC picks up the bulk material at that position, it subtracts a preset height from the updated pile height data. Here, the automatic crane AC can be detected to have reached the floor by any of the following methods: when the weight of the hoisting tool GA is removed from the measurement value of the load cell LD equipped on the automatic crane AC; by detection by a switch installed on the hoisting tool GA; or by detection by a change in the regenerative state of the hoisting motor during lowering.

[0028] Another method is to equip the receiving crane MC and the automatic crane AC with load meters LD, subtract the load value taken from the receiving pit PT by the automatic crane AC from the cumulative load value input by the receiving crane MC at the position of its traverse TS, manage the amount of pile up in the receiving pit PT from the load value remaining in the receiving pit PT, and estimate the pile up height based on that amount of pile up. This method results in cumulative errors in the load values, so it is necessary to correct the pile data at the landing position of the lifting tool GA of the automatic crane AC.

[0029] One method for managing the bulk material pile height in the receiving pit PT is to install a receiving pit height detection device LS and directly measure the bulk material pile height in the receiving pit PT. As shown in Figure 1, the receiving pit height detection device LS can be used in a variety of ways, including using an optical or ultrasonic distance meter to measure the pile height of bulk materials by shining a laser beam or ultrasonic wave from above, or using a photocell from the side to check whether light passes through or is blocked. The method of operation is to issue a request to the automatic crane AC to come and pick it up when a certain specified height is exceeded, so it is sufficient to only detect the height at one point, but if the height is detected at several points, more precise control is possible. By the way, when measuring the pile height of bulk materials in the receiving pit PT with the receiving pit height detection device LS, if the lifting device GA of the automatic crane AC is mistakenly detected as the pile height of bulk materials, Therefore, when the automatic crane AC is at that position, it is necessary to stop measuring the pile height at that position.

[0030] If the receiving crane MC drops loose material from the slope SL in the area surrounding the position of the same lateral TS while the automatic crane AC is removing loose material that has accumulated in the receiving pit PT at the position of the lateral TS, the loose material will get caught on the top surface of the hoisting fixture GA of the automatic crane AC, causing problems such as damaging the equipment and cables on the top surface of the hoisting fixture GA of the automatic crane AC, or the hoisting fixture GA of the automatic crane AC becoming buried and unable to be removed.

[0031] To address this issue, it is necessary to provide an interlock between the surrounding area of ​​the position of the traverse TS when the receiving crane MC is inserted onto the slope SL and the surrounding area of ​​the position of the traverse TS when the automatic crane AC goes to retrieve loose items from the receiving pit PT so that they do not overlap.

[0032] When the automatic crane AC goes to retrieve loose material from the receiving pit PT, an electrical interlock is provided to prevent the receiving crane MC from entering the insertion position within the range of the lateral travel TS and from performing insertion operations at the insertion position, so that the automatic crane AC does not insert loose material into the peripheral range of the position of the lateral travel TS. Then, the automatic crane AC notifies the crane operator OP of the receiving crane MC by means of a signal light SI or the like, which serves as a display means for indicating that the automatic crane AC is in the process of performing the work step of going to retrieve the receiving pit PT at the position of the traversing TS. This prevents the receiving crane MC from dropping loose material onto the lifting fixture GA of the automatic crane AC.

[0033] An interlock is set up so that the automatic crane AC does not go to retrieve the receiving pit PT in the surrounding area of ​​the position of the traverse TS that the receiving crane MC has put in, and the work step of retrieving the area around the traverse TS is temporarily put on hold, and the work for the next step is carried out. This prevents the lifting gear GA of the automatic crane AC from becoming buried in the loose material falling from the slope SL.

[0034] Then, when the receiving crane MC has finished inserting the load in the area surrounding the position of the traverse TS, the interlock to the automatic crane AC is released, and the automatic crane AC executes the work step of going to retrieve the area surrounding the position of the traverse TS that was temporarily reserved.

[0035] When an automatic crane AC starts to execute a work step of picking up loose objects from a receiving pit PT in the area surrounding the position of a certain traverse TS, and when preparations for unloading of a truck TR are completed in the area surrounding the position of the same traverse TS, an evacuation command is sent from the receiving crane MC to the automatic crane AC, the work step of the automatic crane AC is put on hold, and priority is given to the work of the receiving crane MC, thereby prioritizing the unloading of the truck TR and reducing the backlog of truck TR.

[0036] Incidentally, the automatic crane AC will accept the evacuation command from the receiving crane MC if the hoisting gear GA of the automatic crane AC has not yet landed on the bulk material in the receiving pit PT, but will complete the work step it is currently performing without accepting the evacuation command if the hoisting gear GA of the automatic crane AC has already landed on the bulk material in the receiving pit PT.

[0037] Here, if the receiving crane MC continues to input materials at the same traversing TS position while issuing a retreat command to the automatic crane AC, the receiving pit PT will become full. In this case, the receiving crane MC is prohibited from putting in the goods, and the automatic crane AC gives priority to picking up the bulk goods from the position where the receiving pit PT is full.

[0038] The priority task of the automatic crane AC is to supply bulk materials from the storage yard SY to the next process, but the configuration of the bulk material handling crane receiving system of the present invention completely eliminates the intrusion of people HU into the automatic area AA, and when combined with the receiving crane MC, efficient automatic operation is possible, making it possible to smoothly achieve both a stable supply of bulk materials to the next process and smooth reception from the receiving pit PT to the storage yard SY.

[0039] Incidentally, when different types of bulk goods are loaded onto each truck TR that brings in the bulk goods, the bulk goods can be managed by type by limiting the stopping position of the truck TR and the range in which they are dropped onto the slope for each type. The layout shown in Figure 2 has two delivery trucks, but there are cases where loose goods are sorted by type before being accepted, and if there are many types, it is necessary to increase the number of parallel parking rows for the trucks TR. In this case, the directions of the lateral movement TS and traveling movement TL of the receiving crane MC shown in Figure 2 are reversed, so that the receiving crane MC travels in the direction of the truck TR's advancement, and moves from the truck TR to the slope SL by lateral movement. The layout is such that the automatic crane AC runs in the same direction as the receiving crane MC, in line with the longitudinal direction of the building.

[0040] In the embodiment described here, the lifting gear GB of the receiving crane MC and the lifting gear GA of the automatic crane AC, and the bulk materials handled, are most suitably applied to handling iron scrap using lifting magnets, but the lifting gear GB of the receiving crane MC and the lifting gear GA of the automatic crane AC can be applied in various forms such as grab buckets, tongs, lifting magnets, vacuum lifters, etc., and are not limited to these types. Furthermore, the type of bulk material is not limited to a specific type and may include wood chips, grain, iron scrap, coal, lime, slag, and the like.

[0041] The above describes the bulk material handling crane receiving system of the present invention based on its embodiment, but the present invention is not limited to the configuration described in the above embodiment, and the configuration can be changed as appropriate within the scope of the spirit of the present invention. [Industrial Applicability]

[0042] According to the bulk material handling crane receiving system of the present invention, bulk materials brought in by truck are unloaded using a receiving crane operated with human intervention, and in the process of transferring the bulk materials from the human intervention area to a downstream automatic crane, a ramp is used to efficiently transfer the bulk materials and completely separate people from the automatic crane, improving the operating rate and safety of the automatic crane and making it useful in industry. [Explanation of symbols]

[0043] MC receiving crane GB Receiving crane lifting equipment OP Crane Operator AC Automatic Crane GA Automatic Crane Lifting Device TR Truck CN Container (Cargo Loading Component) HU person SL Slope PT Receiving Pit SY Storage Yard MA Accessible Area AA Automatic Area SI signal light TI Truck Exit Sign LS Receiving pit height detection device LD Load Cell PS Position Detector TS rampant TL running

Claims

1. In this bulk material handling crane receiving system, a front-stage receiving crane unloads bulk materials from an incoming truck loaded with the materials and then hands them over to a rear-stage automatic crane. A slope is provided between the front-stage receiving crane and the rear-stage automatic crane, and the height of the slope is such that the receiving crane side is at the height of near the top surface of a cargo loading structure arranged on the loading platform of the incoming truck, and the slope is provided downward toward the automatic crane side, with the slope angle set so that bulk materials dropped on the slope by the receiving crane will naturally slide down toward the automatic crane, allowing the bulk materials to be moved along the slope from the operating area of ​​the receiving crane to the operating area of ​​the automatic crane. This bulk material handling crane receiving system is characterized in that the side of the slope facing the receiving crane is an area where people can enter, and the side of the slope facing the automatic crane is an area where people are not allowed to enter.

2. A bulk material handling crane receiving system as described in claim 1, characterized in that the height of the pile of bulk material in the area surrounding the pit location where the bulk material falls down the slope is managed by accumulating a predetermined additional value per drop based on the number of times the receiving crane drops the bulk material at a certain location on the slope.

3. A bulk material handling crane receiving system as described in claim 1, characterized in that when the receiving crane drops bulk material at a certain position on the slope, the load value of the load meter equipped on the receiving crane is used to accumulate and manage the amount of bulk material piled up in the surrounding area around the position of the receiving pit where the bulk material falls down the slope of the slope, and in addition, the pile height associated with that pile amount is estimated and managed.

4. A bulk material handling crane receiving system as described in claim 2 or 3, characterized in that when an automatic crane heads to pick up bulk material that has fallen from the slope and is in a horizontal position in a receiving pit where the bulk material is piled up, and when the automatic crane lowers its hoisting gear to land on the bulk material in that horizontal position, the deceleration position for the automatic crane's lowering is determined based on the height of the piled bulk material.

5. A bulk material handling crane receiving system as described in claim 1, characterized in that when an automatic crane picks up bulk material at a location in a receiving pit where bulk material that has fallen from the slope is piled up, the height position of the automatic crane's hoisting equipment at the moment the automatic crane's hoisting equipment touches down on the bulk material at that location is updated as the pile height of the bulk material at that location, and when the automatic crane's hoisting equipment picks up the bulk material at that location, a predetermined height or a height estimated from the value of the load meter equipped on the automatic crane is subtracted from the updated pile height data to estimate and manage the pile height.

6. A bulk material handling crane receiving system as described in claim 1, characterized in that the receiving pit where bulk material that falls from the slope is deposited is equipped with a detector for detecting the pile height of the bulk material, and the pile height of the bulk material at that location is managed.

7. A bulk material handling crane receiving system as described in claim 1, characterized in that when the automatic crane is in the process of retrieving bulk material from a receiving pit at a certain location, the receiving crane is electrically interlocked to prevent it from performing a throwing operation onto a slope around that location, and the automatic crane is equipped with an indication means to indicate that it is in the process of retrieving bulk material.

8. The work step of the automatic crane is temporarily stopped so that the automatic crane does not go to the area around the receiving pit position down the slope from the position where the receiving crane is putting in. A bulk material handling crane receiving system as described in claim 1, characterized in that the system holds the work and executes the next step, and when the receiving crane has completed its input in the vicinity of its position, the temporarily held work step is executed.

9. A bulk material handling crane receiving system as described in claim 1, characterized in that when the automatic crane begins to perform a work step of picking up bulk material from a receiving pit at a certain location, and it is desired to deploy the receiving crane at a location upstream from that location up a slope, an evacuation command is sent from the receiving crane to the automatic crane, putting the automatic crane's work step on hold and allowing the receiving crane's work to take priority.

10. A bulk material handling crane receiving system as described in claim 9, characterized in that the evacuation command sent to the automatic crane is accepted from the receiving crane if the automatic crane's hoisting equipment has not yet landed on the bulk material in the receiving pit, and the automatic crane completes the work step without accepting the evacuation command if the automatic crane's hoisting equipment has already landed on the bulk material in the receiving pit.

11. A bulk material handling crane receiving system as described in claim 1, characterized in that when different types of bulk materials are loaded and brought in on each delivery truck, the bulk materials are managed by type by limiting the stopping position of the delivery truck and the range for dropping them onto the slope for each type.

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