JP5700292B2 - Body position management system - Google Patents

Description

  The present invention relates to a vehicle body position management system that grasps the position in a facility for each of a plurality of article transport vehicle bodies that carry articles while being loaded.

  Conventionally, as this kind of vehicle body position management system, the one described in Patent Document 1 is known. This vehicle body position management system manages the positions of a plurality of carriages used in a facility. A plurality of carts as article transporting vehicle bodies are each equipped with a cart tag composed of a wireless IC tag. And the cart identification information peculiar to each cart is memorized by the cart tag. In addition, a plurality of tag readers that read the cart identification information in the cart tag by short-range communication with the cart tag are disposed at the necessary places in the facility. These tag readers transmit the read cart identification information to the management device. Based on the cart identification information sent from the plurality of tag readers, the management device grasps the position of each cart in the facility. According to such a vehicle body position management system, it is possible to suppress the occurrence of trolley loss by grasping the position of each trolley.

  However, this vehicle body position management system can only grasp the rough position of the cart that is out of the communication area with the tag reader. More specifically, for example, it is assumed that an area within a radius of 2 m centering on the tag reading device is a communicable area between the tag reading device and the cart tag. Further, it is assumed that a tag reading device is disposed at a communication port between the article storage room A and the article storage room B adjacent to each other in the facility. In such a configuration, it is assumed that the carriage X moving from the article storage room A toward the article storage room B approaches the communication port, and the carriage identification information of the carriage tag is read by the tag reader. Then, the management apparatus can grasp | ascertain that the cart X is located in the area which can communicate with a tag reader at that time. However, after that, when the cart X enters the article storage room B and moves out of the communicable area, the cart identification information of the cart tag of the cart X cannot be read by the tag reader. Then, the management device cannot determine whether the position of the carriage X is in the article storage room A or the article storage room B, and can only grasp a rough position that is one of them. It is not possible.

  The present invention has been made in view of the above background, and the object of the present invention is to be able to grasp the position of the article transport vehicle body that is out of the communication area with the reading means in more detail than before. It is to provide a vehicle body position management system.

  The inventor may be able to grasp the traveling direction of the article transport vehicle body by distinguishing whether the article transport vehicle body is in a state where an article is placed or not. Focused on. For example, in a facility, an article transport vehicle body that goes from an article storage room to an unloading truck yard adjacent to the article storage room is in a state where an article to be carried out to a destination is placed. On the contrary, the article transporting vehicle body which goes from the truck yard for unloading to the article storage room adjacent thereto is immediately after all the articles have been delivered to the truck, and is in a state where no articles are placed thereon. When the reading means disposed at the communication port between the unloading truck yard and the article storage room reads the article identification information in addition to the body identification information, the article transport vehicle body corresponding to the body identification information is the article. Is in a state of being placed. Since the article transport vehicle body in this state travels from the article storage chamber toward the unloading truck yard, after that, when communication with the reading means is interrupted, it is moved into the unloading truck yard. On the other hand, when the reading unit reads only the vehicle body identification information, the article transport vehicle body corresponding to the vehicle body identification information is in a state where no article is placed. Since the article transport vehicle body in this state travels from the carry-out truck yard toward the article storage room, after that, when communication with the reading means is interrupted, it is moved into the article storage room.

Therefore, in order to achieve the above object, the invention of claim 1 includes vehicle body identification information stored in vehicle body identification information storage means individually mounted on a plurality of article transport vehicle bodies for carrying and transporting articles, Based on short-range wireless communication, a plurality of reading means for reading at different positions in the facility where the article transport body is used, and the position of the article transport body in the facility based on the reading results by the plurality of reading means In addition to reading the vehicle body identification information stored in the vehicle body identification information storage unit by short-range wireless communication, the vehicle body position management system including the vehicle body position grasping unit that is mounted on the article transport vehicle body together with the article. Each of the plurality of reading means is configured to perform a process of reading the article identification information in the article identification information storage means. In both cases, the article read corresponding to the vehicle body identification information is based on the difference between the information read by the reading means being both the vehicle body identification information and the article identification information, or only the vehicle body identification information. For the vehicle body, a determination process is performed to determine in which of the two regions existing on the opposite sides of the installation position of the reading means that has read the vehicle body identification information. As described above, the vehicle body position grasping means is configured.
Further, the invention according to claim 2 relates to the vehicle body position management system according to claim 1, wherein the vehicle body identification information is associated with the region information which is information on the region where the corresponding article transport vehicle body is located. The vehicle body position grasping means is configured to carry out the processing stored in the storage means.
Further, in the vehicle body position management system according to claim 2, when only the vehicle body identification information is received among the vehicle body identification information and the article identification information, the invention according to claim 3 corresponds to the vehicle body identification information. As the state information indicating the state of the article transporting vehicle body, the empty state information indicating that the article is not placed is stored in the association information storage unit in association with the area information, while receiving both pieces of identification information. In this case, the vehicle body position grasping means is configured to perform processing for storing the loading state information indicating that the article is loaded in the association information storage means in association with the area information. It is a feature.
According to a fourth aspect of the present invention, in the vehicle body position management system according to the second or third aspect, the article transport vehicle body corresponding to the vehicle body identification information is positioned at the present time based on the timing at which the vehicle body identification information is received. The vehicle body position grasping means is configured to carry out a process of starting to measure the stagnation time in a certain area.
According to a fifth aspect of the present invention, in the vehicle body position management system according to the fourth aspect, based on the reception of the vehicle body identification information, the region information and the stagnation time for the article transport vehicle body corresponding to the vehicle body identification information. The vehicle body position grasping means is configured to execute a process of associating the history with the vehicle body identification information and storing it in the association information storage means.

  In these inventions, based on the difference between whether the information read by the reading means is only the vehicle body identification information or both the vehicle body identification information and the article identification information, the reading means is installed on the article transporting vehicle body. It is grasped in which of the two regions existing on the opposite sides of the position the region is located. Thereby, the position of the article transport vehicle body that is out of the communicable area with the reading means can be grasped in more detail than before.

The block diagram for demonstrating the structure of the vehicle body position management system which concerns on embodiment. The schematic diagram which shows an example of the trolley | bogie management database stored in the main management apparatus of the vehicle body position management system in a table format. The schematic diagram which shows an example of the display by the state totalization process implemented by the main management apparatus. The schematic diagram which shows an example of the display by the total process according to the area | region implemented by the main management apparatus. The schematic diagram which shows an example of the display by the log | history display process implemented by the main management apparatus.

Hereinafter, an embodiment of a vehicle body position management system to which the present invention is applied will be described. First, a basic configuration of the vehicle body position management system according to the embodiment will be described.
FIG. 1 is a block diagram for explaining a configuration of a vehicle body position management system according to an embodiment. The vehicle body position management system includes a first reading device 11, a second reading device 12, a third reading device 13, a fourth reading device 14, a main management device 21, a sub management device 22, and the like. Among these, the first reading device 11, the second reading device 12, and the main management device 21 are arranged in a parts factory. Further, the third reading device 13, the fourth reading device 14, and the sub management device 22 are arranged in a product manufacturer factory.

  The product manufacturer factory is a facility that manufactures products such as copiers and home appliances. The parts factory is a facility for producing parts used for products manufactured at the product manufacturer factory. In any of these facilities, the part 8 as an article is carried in a state of being placed on a carriage 1 as an article transporting vehicle body. A plurality of carts 1 used in those facilities are each equipped with a cart tag (not shown) composed of a wireless IC tag storing vehicle body identification information unique to the individual vehicle. It is the same as an IC tag generally used for RFID (Radio Frequency Identification) or the like, and has a built-in battery for emitting radio waves with its own power.

  In the parts factory, there are a parts production line, a parts storage, an intermediate passage, a truck yard for unloading and the like. The parts 8 produced in the parts production line are accommodated in a packing box every predetermined number and placed on the carriage 1. In the parts production line, the cart 1 on which a predetermined number of packaging boxes are placed is carried from the parts production line to the parts storage by an operator. At this time, when passing near the first reading device 11 disposed between the parts production line and the parts storage, the first reading device 11 capable of short-range wireless communication with the cart tag has the inside of the cart tag. Vehicle identification information is read.

  The cart 1 placed in the parts storage is transported from the parts storage to the unloading truck yard by the operator in accordance with the parts order from the product manufacturer factory, and loaded on the truck. At this time, when passing near the second reading device 12 disposed between the parts storage and the truck yard for unloading, the second reading device 12 capable of short-range wireless communication with the cart tag causes the inside of the cart tag. Vehicle body identification information is read.

  A main management device 21 is connected to the first reading device 11 and the second reading device 12. When the first reading device 11 and the second reading device 12 read the vehicle body identification information of the bogie tag of the bogie 1, the result is transmitted to the main management device 21 together with the read individual identification information that is its own identification information.

  The management of the parts factory lends the cart 1 free of charge to the product manufacturer factory so that the parts produced at the parts factory can be ordered continuously from the product manufacturer factory. For this reason, from the parts factory, the parts 8 are shipped with being placed on the carriage 1. An empty cart 1 collected from a product manufacturer factory is loaded in a truck parked in a truck yard for unloading at a parts factory for receiving goods. In the unloading truck yard, after the empty carriage 1 is unloaded from the truck, the carriage 1 on which the parts 8 are placed is put on the truck.

  The empty cart 1 unloaded from the truck is transported from the truck yard for unloading to the parts production line through the intermediate passage. At this time, when passing near the second reading device 12 or the first reading device 11, the vehicle body identification information in the cart tag is read by them.

  A product manufacturing line, temporary storage, intermediate passage, truck yard, etc. are arranged in the product manufacturer factory. The parts 8 shipped from the parts factory are unloaded from the truck while being mounted on the carriage 1 at the truck yard of the product manufacturer factory. The truck 1 emptied by the unloading of the parts 8 is carried into the truck yard. An empty carriage 1 placed in the truck yard is loaded on the truck from which the carriage 1 with the parts 8 placed thereon is lowered. These carts 1 are lowered to a truck yard for unloading at the parts factory when the trucks go to the parts factory for the next cargo reception.

  The parts 8 lowered to the truck yard of the product manufacturer factory are transported to the temporary storage together with the cart 1 by the operator. At this time, the carriage 1 that has passed in the vicinity of the third reading device 13 disposed between the truck yard and the temporary storage is moved by the third reading device 13 capable of short-range wireless communication with the carriage tag. The vehicle body identification information inside is read.

  The cart 1 placed in the temporary storage is transported from the temporary storage to the product production line by the operator according to the state of use of the parts in the product production line. At this time, after passing near the fourth reading device 14 disposed between the temporary storage and the product production line, the fourth reading device 14 capable of short-range wireless communication with the cart tag causes the inside of the cart tag. Vehicle identification information is read.

  A sub management device 22 is connected to the third reading device 13 and the fourth reading device 14. When the third reading device 13 and the fourth reading device 14 read the body identification information of the cart tag of the cart 1, the third reading device 13 and the fourth reading device 14 transmit the result together with their own reading individual identification information to the sub-management device 22. The sub management device 22 is connected to the main management device 21 of the parts factory via an Internet line or an intranet line. When the reading individual identification information and the vehicle body identification information are sent from the third reading device 13 and the fourth reading device 14, the sub management device 22 transmits them to the main management device 21 of the parts factory in real time. Note that the third reading device 13, the fourth reading device 14, and the sub-management device 22 installed in the product manufacturer factory are loaned free of charge from the site factory.

  The management device of the conventional vehicle body position management system, for example, based on the fact that a combination of the read individual identification information and the vehicle body identification information is sent from the first reading device 11, the position of the carriage 1 corresponding to the vehicle body identification information Was grasped to be in the vicinity of the first reading device 11. However, it has not been possible to grasp where the carriage 1 is located in the parts production line, the parts storage, and the intermediate passage in the vicinity of the first reading device 11.

Next, a characteristic configuration of the vehicle body position management system according to the embodiment will be described.
As described above, in the parts factory, the parts 8 produced in the parts production line are accommodated in a packing box every predetermined number and placed on the carriage 1. A component tag (article identification information storage means) (not shown) composed of a wireless IC tag storing component identification information (article identification information) unique to the component 8 is fixed to the packaging box. The first reading device 11, the second reading device 12, the third reading device 13, and the fourth reading device 14 are all provided with a packing box that encloses the component 8 on the cart 1 that passes by itself. In addition to reading the vehicle identification information in the cart tag fixed to the cart 1, the component identification information of the component tag fixed to the packaging box is read.

  The main management device 21 determines whether the tag reading information sent from each reading device or sub-management device 22 is both vehicle body identification information and part identification information, or only vehicle body identification information. Then, the following determination process is performed. That is, the cart 1 corresponding to the vehicle body identification information is located in any one of the two regions existing on the opposite sides with respect to the installation position of the reader that has read the vehicle body identification information. This is a process for determining whether or not there is.

  For example, it is assumed that a combination of read individual information corresponding to the first reading device 11 and vehicle body identification information is sent. This means that only the vehicle body identification information was read out of the vehicle body identification information and the component identification information when the carriage 1 passed near the first reading device 11. Then, the cart 1 corresponding to the vehicle body identification information has passed through the vicinity of the first reading device 11 in an empty state in which no part 8 is placed. As can be seen from FIG. 1, the carriage 1 that passes in the vicinity of the first reading device 11 in an empty state is carried toward the parts production line. Therefore, the main management device 21 serving as the vehicle body position grasping means, for the cart 1, is a part product among the component production line and the component storage that exist on the opposite sides with respect to the installation position of the first reading device 11. It is determined that it exists on the production line.

  On the other hand, it is assumed that the combination of the individual reading information corresponding to the first reading device 11, the vehicle body identification information, and the part identification information is sent to the main management device 21. This means that both the vehicle body identification information and the component identification information were not read when the cart 1 passed near the first reading device 11. Then, the cart 1 corresponding to the vehicle body identification information has passed in the vicinity of the first reading device 11 with the component 8 placed thereon. As can be seen from FIG. 1, the carriage 1 that passes through the vicinity of the first reading device 11 with the component 8 mounted thereon is carried toward the component storage. Therefore, the main management device 21 exists in the parts storage among the parts production line and the parts storage that exist on the opposite sides of the carriage 1 with respect to the installation position of the first reading device 11. Is determined.

  Further, it is assumed that a combination of the individual reading information corresponding to the second reading device 12 and the vehicle body identification information is sent to the main management device 21. In this case, the cart 1 corresponding to the vehicle body identification information is carried toward the intermediate passage in an empty state. Therefore, the main management device 21 is present in the intermediate passage among the intermediate passage and the unloading truck yard that exist on the opposite sides of the carriage 1 with respect to the installation position of the second reading device 12. judge.

  On the other hand, it is assumed that the combination of the individual reading information corresponding to the second reading device 12, the vehicle body identification information, and the part identification information is sent to the main management device 21. In this case, the cart 1 corresponding to the vehicle body identification information is carried toward the truck yard for unloading with the component 8 mounted thereon. Therefore, the main management device 21 exists in the unloading track yard among the intermediate passage and the unloading track yard that exist on opposite sides of the carriage 1 with respect to the installation position of the second reading device 12. It is determined that

  Further, it is assumed that a combination of the individual reading information corresponding to the third reading device 13 and the vehicle body identification information is sent to the main management device 21. In this case, the cart 1 corresponding to the vehicle body identification information is carried toward the truck yard of the product manufacturer factory in an empty state. Therefore, the main management device 21 exists in the truck yard among the temporary storage and the truck yard existing on the opposite sides of the carriage 1 with respect to the installation position of the third reader 13 in the product manufacturer factory. It is determined that

  On the other hand, it is assumed that the combination of the individual reading information corresponding to the third reading device 13, the vehicle body identification information, and the part identification information is sent to the main management device 21. In this case, the cart 1 corresponding to the vehicle body identification information is carried toward the temporary storage of the product manufacturer factory with the part 8 mounted thereon. Therefore, the main management device 21 exists in the temporary storage of the truck 1 among the temporary storage and the truck yard existing on the opposite sides with respect to the installation position of the third reader 13 in the product manufacturer factory. It is determined that

  Further, it is assumed that the combination of the individual reading information corresponding to the fourth reading device 14 and the vehicle body identification information is sent to the main management device 21. In this case, the cart 1 corresponding to the vehicle body identification information is transported toward the intermediate passage of the product manufacturer factory in an empty state. Therefore, the main management device 21 exists in the intermediate passage among the product manufacturing line and the intermediate passage existing on the opposite sides of the carriage 1 with respect to the installation position of the fourth reading device 14 in the product manufacturer factory. It is determined that

  On the other hand, it is assumed that the combination of the individual reading information corresponding to the fourth reading device 14, the vehicle body identification information, and the part identification information is sent to the main management device 21. In this case, the cart 1 corresponding to the vehicle body identification information is carried toward the parts manufacturing line of the product manufacturer factory with the parts 8 mounted thereon. Therefore, the main management device 21 exists in the product manufacturing line among the product manufacturing line and the intermediate passage existing on the opposite sides of the carriage 1 with respect to the installation position of the fourth reading device 14 in the product manufacturer factory. It is determined that

Table 1 shown below shows the relationship between each area in the parts factory and product manufacturer factory, and abbreviations. The main management device 21 grasps each area by an abbreviation as shown in Table 1 below.

  When the vehicle identification information is sent to the main management device 21, it means that the position of the carriage 1 corresponding to the vehicle identification information has changed. Hereinafter, in a parts factory or a product manufacturer factory, an area that is recognized as the current position of the carriage 1 until the main management device 21 receives vehicle body identification information is referred to as an old area. An area recognized as the current position of the carriage 1 after receiving the vehicle identification information is referred to as a new area.

  The main management device 21 stores a cart management database that stores vehicle identification information and various types of information in association with each other for a plurality of carts 1 used in parts factories and product manufacturer factories in a hard disk as an association information storage means. Yes. When the vehicle body identification information is received, a process for adding the abbreviation of the new area to the vehicle management database for the vehicle 1 corresponding to the vehicle body identification information is performed. At this time, when only the vehicle body identification information is received out of the vehicle body identification information and the component identification information, as the state information indicating the state of the carriage 1, the empty state information indicating that the article is not placed is used. , Input to the cart management database in association with the abbreviation of the new area. On the other hand, when both the vehicle body identification information and the parts identification information are received, the loading state information indicating that the article is loaded is input to the cart management database in association with the abbreviation of the new area.

  Also, the main management device 21 starts measuring the stagnation time in the new area, which is the area currently located, for the cart 1 corresponding to the vehicle body identification information, based on the timing at which the vehicle body identification information is received. Then, stop counting the stagnation time in the old area.

  FIG. 2 is a schematic diagram showing an example of the cart management database in a table format. In the figure, the data input in the leftmost column is the vehicle body identification information of each cart 1. In the second and subsequent columns, data relating to the old area of the carriage 1 corresponding to the vehicle body identification information and data relating to the new area are input. Of the data in the second and subsequent columns, the rightmost data relates to the new area, and the other data relates to the old area. Data related to the old area and data related to the new area are input in the format of first character string + hyphen + second character string + hyphen + third character string + hyphen + fourth character string. The abbreviations shown in Table 1 are input to the first character string. In addition, “empty” that is empty state information or “load” that is loaded state information is input to the second character string. In addition, in the third character string, the measurement result of the stagnation time is input in unit time notation of 0.1 hour (6 minutes). The fourth character string is input with the date and time and hour / minute / second when the time measurement processing of the stagnation time is started. The fourth character string includes not only the character string indicating the year / month / day but also the character string indicating the hour / minute / second. However, in FIG. 2, for the sake of convenience, six digits (the last two digits of the year + Only the number of the month (2 digits + day 2 digits) is shown.

  In the table of FIG. 2, for example, the data relating to the old area input in the first row and the second column is as follows: February 3, 2010 (actually hour, minute, second) for the cart 1 with the vehicle body identification information = E-001 The timing of the stagnation time in the parts production line is started, and the state at this time is empty and the final stagnation time is 2 hours. In the case of data relating to the old area, the stagnation time is a fixed value, whereas in the case of data relating to the new area (data on the rightmost side), the stagnation time is a value being measured. For this reason, the main management apparatus 21 updates the input value of the stagnation time in the new area every 6 minutes for all the vehicle body identification information.

  The main management device 21 performs a state-by-state aggregation process when an operator makes a state-by-state aggregation command. This state-by-state aggregation process is based on the data related to the new area for all body identification information, the number of maker inventory “loading” trolleys, the number of manufacturer inventory “empty” trolleys, the number of company inventory “loading” trolleys, In this process, the number of “empty” trolleys, the number of trolleys being delivered, and the number of trolleys being returned are totaled and the results are displayed on a display as shown in FIG. 3, for example. Note that the number of “stock” trucks in the manufacturer's inventory is the total number of trucks 1 in which “Me 1” (product manufacturing line) or “Me 2” (temporary storage) is entered as an abbreviation for the new area among all trucks 1. is there. In addition, the number of maker inventory “empty” trolleys is the total number of trolleys 1 in which “Me” (the central passage of the maker product factory) is input. The number of “stock” carts in-house stock is the total number of carts 1 to which part 1 (parts production line) or part 2 (parts storage) is input as an abbreviation for the new area. The number of in-house inventory “empty” carts is the total number of carts 1 into which part 4 (the central passage of the parts factory) is input as an abbreviation for the new area. In addition, the number of trucks during delivery is the total number of trucks 1 to which part 3 (unloading truck yard) is input as an abbreviation for the new area. The number of carts being returned is the total number of carts 1 to which “3” (the truck yard of the product manufacturer factory) is input as an abbreviation for the new area. By causing the main management device 21 to perform such state totalization processing, the number of trucks in the parts factory, the number of trucks in the product manufacturer factory, and the trucks that are moving or preparing to move between the two factories. The ratio with the number can be easily grasped.

  Moreover, the main management apparatus 21 will perform the totaling process according to area | region, if the totaling command according to area | region is made by the operator. This area-by-area totaling process is a process for totalizing the number of trucks in each area based on data relating to the new area for all vehicle body identification information and displaying the result on a display as shown in FIG. 4, for example. In this area-by-area totaling process, as shown in FIG. 4, the respective areas are sorted and displayed on the display in the descending order of the number of carriages. By causing the main management device 21 to perform such area-by-area aggregation processing, it is possible to easily grasp whether or not the stagnation of the carriage 1 is excessive for each area. Thereby, by preventing the occurrence of excessive stagnation in advance, it is possible to avoid the occurrence of a deficiency of carts in each region without excessively increasing the number of carts 1 in stock.

  Moreover, the main management apparatus 21 will perform a history display process, if the operator inputs the vehicle body identification information and the history display command. In this history display process, all the history of data related to the old area and the data related to the new area are displayed in a list form as shown in FIG. 5 for the cart 1 corresponding to the vehicle body identification information input by the operator. It is a process to display. By causing the main management device 21 to perform such history display processing, it is possible to grasp the movement history in detail for each carriage 1.

  So far, the embodiment of the vehicle body position management system configured to grasp the position of the carriage 1 at each of the two facilities (part factory and product manufacturer factory) has been described, but the position of the carriage 1 only within one facility. You may make it grasp.

  As described above, in the vehicle body position management system according to the embodiment, the vehicle body identification information and the abbreviation as region information that is information on the region in which the cart 1 corresponding to the vehicle body identification information are associated and stored in the hard disk as the association information storage unit. The main management device 21 as the vehicle body position grasping means is configured so as to execute the processing. In this configuration, the history of the old area can be stored in the cart database stored in the hard disk for each cart 1.

  Further, in the vehicle body position management system according to the embodiment, the main management device 21 is configured to perform the following processing. That is, with vehicle body identification information. When only the vehicle body identification information is received among the component identification information as the article identification information, the state information indicating the state of the carriage 1 corresponding to the vehicle body identification information indicates that no article is placed. The empty state information (“empty”) is input to the cart management database in association with the abbreviation which is the area information. On the other hand, when both pieces of identification information are sent, the loading status information (“loading”) indicating that the component is loaded is input to the cart management database in association with the abbreviation. In such a configuration, it is possible to easily grasp the state information in the history of the old area for each carriage 1.

  Further, in the vehicle body position management system according to the embodiment, based on the timing at which the vehicle body identification information is received, the processing for starting the stagnation time in the new area is started for the cart 1 corresponding to the vehicle body identification information. In addition, the main management device 21 is configured. In such a configuration, by measuring and storing the stagnation time of the carriage 1 in each region, the user can easily grasp whether or not excessive stagnation has occurred.

  Further, in the vehicle body position management system according to the embodiment, based on the reception of the vehicle body identification information, the abbreviation of the old region and the history of the stagnation time are associated with the vehicle body identification information for the cart 1 corresponding to the vehicle body identification information. Thus, the main management device 21 is configured so as to perform the process of inputting to the cart management database. In such a configuration, the user can easily grasp whether or not excessive stagnation has occurred in the history of each old area.

1: Cart (carriage for goods)
11: First reading device (reading means)
12: Second reading device (reading means)
13: Third reading device (reading means)
14: Fourth reading device (reading means)
21: Main management device (body position grasping means)
22: Sub-management device

JP 2010-18410 A

Claims (5)

The vehicle body identification information stored in the vehicle body identification information storage means individually mounted on each of the plurality of article transport vehicle bodies that carry the article is transferred to each other in the facility where the article transport vehicle body is used by short-range wireless communication. A plurality of reading means for reading at different positions;
In a vehicle body position management system comprising vehicle body position grasping means for grasping the position of the article transport vehicle body in the facility based on the reading results by the plurality of reading means,
In addition to reading the vehicle body identification information stored in the vehicle body identification information storage means by short-range wireless communication, the article identification information in the article identification information storage means placed on the article transport vehicle body together with the articles is also read. Each of the plurality of reading means is configured to perform processing,
Regarding the article read vehicle corresponding to the vehicle identification information based on the difference between the information read by the reading means being both the vehicle identification information and the article identification information or only the vehicle identification information The determination processing for determining which region is located out of the two regions existing on the opposite sides with respect to the installation position of the reading means that has read the vehicle body identification information is performed. A vehicle body position management system comprising the vehicle body position grasping means. In the vehicle body position management system according to claim 1,
The vehicle body position grasping means is configured to perform a process of associating and storing the vehicle body identification information and area information, which is information on an area where the article transport vehicle body corresponding to the vehicle body identification information is located, in the association information storage means. A vehicle body position management system characterized by In the vehicle body position management system according to claim 2,
When only the vehicle body identification information is received out of the vehicle body identification information and the article identification information, the state information indicating the state of the article transport vehicle body corresponding to the vehicle body identification information While the empty state information indicating that it is present is stored in the association information storage means in association with the area information, when both pieces of identification information are received, the loading state information indicating that the article is loaded The vehicle body position management system is characterized in that the vehicle body position grasping means is configured to carry out a process of storing in the association information storage means in association with the area information. In the vehicle body position management system according to claim 2 or 3,
Based on the timing at which the vehicle body identification information is received, the vehicle body position grasping is performed so as to perform the process of starting the measurement of the stagnation time in the area where the vehicle is currently located, for the article transport vehicle body corresponding to the vehicle body identification information. A vehicle body position management system characterized by comprising means. In the vehicle body position management system according to claim 4,
A process of storing the region information and the stagnation time history in association information storage means in association with the vehicle body identification information for the article transport vehicle body corresponding to the vehicle body identification information based on the reception of the vehicle body identification information. A vehicle body position management system comprising the vehicle body position grasping means as implemented.

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