JP5127415B2 - Product management method and product management system - Google Patents

Description

  The present invention relates to an actual product management method and an actual product management system for loading and unloading products, particularly steel products, while moving them using a carriage for transportation.

  Conventionally, for a fixed place in a factory or warehouse of a steel product, the location information of the place based on the coordinate system in the factory or warehouse is stored in a storage medium and the product is moved by an overhead crane or the like. At that time, it was confirmed that the product to be moved is not different from the designated one by comparing the position in the factory or warehouse detected by the overhead crane or the like with the position stored in the storage medium.

On the other hand, Patent Document 1 discloses a technique for managing an actual product (coil) in a transport cart. The technique disclosed in Patent Document 1 is a pallet position detection device that detects a deviation amount from a designated place of a pallet itself loaded on a conveyance carriage when the conveyance carriage enters a factory or a warehouse. (See the upper left column on page 4). Next, regarding the position of the coil on the pallet, the absolute position of the pallet coil cradle was corrected with the pallet displacement detected above (see the upper left column on page 5), and the coil was placed on the pallet. The coil position on the pallet is converted into the travel / transverse position from the subsequent travel / transverse data and the amount of pallet position deviation and stored (see the lower left column on page 7) to manage the coil.
JP-A-3-31121

  However, in the above-described technique for managing the position in the factory or warehouse with reference to the coordinate system, the position where the transportation carriage enters the factory or warehouse and stops when a transportation carriage (for example, a pallet) is used. However, each time, the displacement is in the order of several tens of centimeters. Therefore, unless the amount of displacement is grasped, the position cannot be managed and cannot be applied. Therefore, in the work of loading the product on the transport cart and unloading the product from the transport cart, it is necessary to collate the work instruction with the actual product, that is, visually confirm by a human operator such as a crane operator. was there. In this case, an operation error sometimes occurs such as moving a product different from the instructed one.

  On the other hand, although the technique described in Patent Document 1 can be fully automated, it is necessary to compare absolute coordinates. For this reason, it is necessary to install an IC tag or the like for grasping absolute coordinates and to construct a large-scale system for managing the information, which requires a large capital investment.

  Accordingly, the present invention provides an actual product management method and actual product management capable of reliably performing actual product management without error when performing loading and unloading while moving using a transport carriage without making a large capital investment. The purpose is to provide a system.

  The inventors of the present invention have intensively studied a method for solving the above problems. FIG. 1 is a diagram for explaining the arrangement of the coils 7 on the pallet 6 placed on the carriage 5. Here, FIG. 1 exemplifies a case where a pallet on which a total of 8 coils of 4 coils and 2 coils in the left-right direction perpendicular to the traveling direction of the transporting carriage is used is used. doing. Note that the number of coils placed on the pallet can be appropriately changed depending on the size of the coils and the like, and is not limited to the above case.

  In each factory where coils are loaded and unloaded, the place where the pallet transported by the transport carriage is placed is determined, but the position where the pallet is placed is not high, and there is a variation of several tens of centimeters relative to the reference position. It is normal. Further, regarding the state in which the pallet is placed, for example, as shown in FIGS. 1B and 1D, the pallet may be placed obliquely. Therefore, as before, the coil position (see FIG. 1 (a)) at the time when the coil is placed is the absolute coordinate of the coil lowering factory with reference to the absolute coordinate system determined by the crane in the coil stacking factory. If the pallet is placed at the reference position in both the loading factory and the unloading factory, there is no problem if the pallet is placed at the reference position, but if the position is shifted or placed at an angle, the converted position is large. It will shift | deviate (refer FIG.1 (b)), and grasping | ascertaining a position will become difficult.

  Therefore, as a result of repeated studies, the present inventors have determined that the coordinate system on the pallet, that is, one coil on the pallet is used as a reference, not the absolute coordinate system determined by the crane in the factory. I came up with a coordinate system (see FIG. 1C) expressed in relative positions. If one coil on the pallet is used as a reference and the other is expressed by its relative position, the positional relationship in the pallet does not change, so it is placed obliquely (see FIG. 1 (d)). As a result, the position of the coil can be reliably grasped. In other words, the position of the coil to be lifted is recognized by the absolute coordinates in the factory, which is the position of the crane, and when it is converted into a position on the pallet and loaded and unloaded, the coil on the basis of the position on the pallet I came to know that it would be good to manage collation.

  In addition, as the examination is repeated, the positions of the coils placed on the pallet are preliminarily arranged in the same number of regions as the maximum number of coils that can be placed on the pallet, in the example shown in FIG. 1, eight regions. If the position of the coil is specified based on the individual areas and the position of the coil is determined accordingly, it is possible to make a determination without calculating the relative position very strictly. I came to know that.

The present invention has been made based on the above findings and has the following characteristics.
[1] When loading / unloading a product on a pallet placed on a carriage, the position of the product loaded on the pallet is the position of the first product placed at a predetermined position on the pallet. An actual product management method characterized by storing as relative position information as a reference, and managing the position of a product on a pallet based on the stored relative position information.
[2] When the product is loaded on the pallet placed on the carriage, the position information of the product loaded on the pallet is used as relative position information based on the position of the product placed at a predetermined position on the pallet. , A product information storage step for storing in correspondence with the product number of the product;
When the product is lowered from the pallet placed on the carriage, the position information of the product to be lowered from the pallet is calculated as relative position information based on the position of the product placed at a predetermined position on the pallet, And a relative position information comparison step for comparing the calculated relative position information with the relative position information stored in the product information storage step and corresponding to the product number of the product to be lowered from the pallet. Management method.
[3] When the product is loaded on the pallet placed on the carriage, the position information of the product loaded on the pallet is used as relative position information based on the position of the product placed at the predetermined position on the pallet. , Product information storage means for storing the product corresponding to the product number;
When the product is lowered from the pallet placed on the carriage, the position information of the product to be lowered from the pallet is calculated as relative position information based on the position of the product placed at a predetermined position on the pallet, And a relative position information comparing means for comparing the calculated relative position information with the relative position information stored in the product information storing step and corresponding to the product number of the product to be lowered from the pallet. Management system.

  According to the present invention, an actual product management method and an actual product that can reliably perform actual product management without error when performing loading and unloading while moving using a transport carriage without making a large capital investment. A management system is provided.

  Hereinafter, an example of the best mode for carrying out the present invention will be described.

  FIG. 2 is a diagram showing an example of the configuration of the actual product management system according to the present invention. In this example, the product is transported from the product stacking factory 2 where the products are placed on the pallet placed on the transporting carriage to the product unloading factory 3 for performing the next process using the transporting carriage. explain. In the following description, the product will be described using a coil, which is a steel product, as an example. However, the present invention is not limited to the coil, and the inside of the factory or warehouse is moved using a transport carriage. It can be applied to all products that are loaded and unloaded.

  In FIG. 2, based on a conveyance command from the host computer 1 that manages the entire system, the product stacking factory 2 places the coil that is the actual product on a pallet placed on a carriage. The conveyance carriage loaded with the coil carries the coil to the product unloading factory 3 for performing the next process, and then lowers the coil there.

  The product loading factory 2 includes a crane 21 for moving the coil in the factory and loading the coil onto the pallet, a crane control device 22 for controlling the crane 21, and an actual product in the product loading factory. An in-product management device 23 for managing the coils is provided. The coil that has been manufactured on the production line at the product stacking factory 2 is stored in the factory until it is shipped to a coil yard in the next process. In addition, the shipment here includes the meaning of the shipment to the customer as well as the conveyance to the next process.

  In the product loading factory 2, the operation of placing the coil having the designated product number on the pallet for placing the coil on the carriage by using the crane 21 based on the conveyance command from the host computer 1. Do.

  The crane 21 is configured to be movable by a traveling rail that is arranged two-dimensionally (XY) perpendicular to the inside of the factory. And the position is controlled by the XY coordinate by the crane control apparatus 22. Moreover, the crane control apparatus 22 can display and output the position of the crane when lifting the coil and when lowering the coil by XY coordinates (in-factory absolute coordinates). In addition, the position of the crane uses a laser or induction radio, puts a laser transmitter on the crane, a reflector on each of the x side wall and the y side wall of the factory, measures the time when the laser reflects and returns, The coordinates (x, y) of the crane position in the whole are determined. For this, a conventionally known technique may be used.

  As shown in FIG. 2, the coordinate information of the crane position is output from the crane control device 22 to the actual product management device 23 in the product loading factory. For example, when the coil lifted by the crane 21 is lowered onto a pallet placed on the carriage, the in-product management apparatus 23 in the product stacking factory sets the crane 21 in the absolute coordinate system in the factory at the timing of releasing the gripped coil. When the XY coordinate information is received from the crane control device 22, the coordinate information is converted into the relative coordinates of the coil on the pallet. Then, the relative coordinate information is output to the host computer 1 in association with the coil product number. The host computer 1 stores the data in the product information storage device 11. Here, the product information storage device 11 can be configured by a storage medium such as a hard disk or a memory.

  The carriage for which the coil has been loaded in the product loading factory 2 is conveyed to the product unloading factory 3 in accordance with a command from the host computer 1. Here, the product unloading factory 3 includes a crane 31 for unloading the coil on the pallet placed on the carriage and moving the coil in the factory, and a crane control device 32 for controlling the crane 31. The product unloading factory actual product management device 33 is provided for managing the coil that is the actual product in the product unloading factory. The crane 31, the crane control device 32, and the product unloading factory actual product management device 33 have the same configuration as the crane 21, the crane control device 22, and the product loading factory actual product management device 23 in the product loading factory 2 described above. Things can be used.

  In the product unloading factory 3, when a transport cart loaded with coils arrives, a work command is first transmitted from the host computer 1 to the product unloading factory actual product management device 33. The product unloading factory actual product management device 33 that has received the transmission of the work command gives an instruction to the crane control device 32 based on the content of the work command, and the crane control device 32 uses the crane 31 to set the coil, for example, The product is unloaded at the coil yard upstream of the production line in the factory 3. At this time, along with the work command from the host computer 1, the product unloading factory actual product management device 33 is loaded on the trolley for arrival, and the coil number to be unloaded and the coil at the product stacking factory 2 are installed. The relative coordinates on the pallet at the time of loading are transmitted from the host computer 1.

  In the product unloading factory 3, when the coil on the pallet placed on the carriage is unloaded, the XY coordinate information of the crane 31 in the absolute coordinate system in the factory when the crane 31 lifts the coil is used as the crane control device. The product is sent from 32 to the actual product management device 33 in the factory. The product unloading factory actual product management device 33 converts the coil coordinate information received from the crane control device 32 into relative coordinates on the pallet placed on the carriage.

  Furthermore, in the product unloading factory actual product management device 33, the converted relative coordinates are the relative coordinates when the coil is placed on the pallet in the product stacking factory 2 corresponding to the same product number transmitted from the host computer 1. And compare. If the relative coordinates converted by the actual product management device 33 in the product unloading factory and the positional information of the relative coordinates transmitted from the host computer 1 match, it is determined that the coils match. The coil lifted by the crane 31 is different from the coil for which the work command has been issued and warns that it is abnormal processing. This makes it possible to reliably manage the coil that is the actual product without error.

  In the above description, the host computer 1, the actual product management device 23 in the product loading factory at the product loading plant 2, and the actual product management device 33 in the product unloading factory 3 are different devices (computers). Described. However, each of these functions may be provided by a single computer, and the function of the host computer 1 is either in the product loading factory actual product management device 23 or the product unloading factory actual product management device 33. The configuration may be included.

  Hereinafter, a method for determining whether or not the coils match will be described in more detail.

  In FIG. 3, an example of the processing flow in the product loading factory 2 is shown. First, a coil loading command on a pallet placed on a transport carriage is input from the host computer 1 and processing is started (S21).

  Next, it is determined whether or not the coil loaded on the pallet is the first coil loaded first (S22). Here, if it is the first coil (when the determination in S22 is “Yes”), the position of the crane on the pallet, that is, the position information of the crane at the timing of releasing the gripped coil (factory) (Absolute absolute coordinates) is obtained from the crane control device 22 and stored in, for example, storage means (not shown) provided in the actual product management device 23 in the product loading factory in association with the product number (coil number) of the coil ( S23). For example, the first coil may be determined to be placed on the “left” / “first row” of the pallet, but is not limited to this location. Further, the coil placed in the coil yard in the product stacking factory 2 is associated with a product number (coil number) in absolute coordinates in the factory, for example, storage means provided in the actual product management device 23 in the product stacking factory. Is remembered. Therefore, at the timing when the coil is lifted from the coil yard, the coil product number can be read from the position information of the crane.

  Next, the processing after the second coil (when the determination in S22 is “No”) will be described. When the second and subsequent coils are loaded on the pallet, the crane position information (absolute coordinates in the factory) at the position where the coil is lowered is obtained from the crane control device 22 as in the first coil. Next, based on the position information, a relative position with respect to the position of the first coil is calculated and stored in a storage means provided in the actual product management device 23 in the product stacking factory in association with the product number (coil number) of the coil. (S24).

Calculation of the relative position of the second and subsequent coils with respect to the position of the first coil can be performed, for example, as follows .
First coil: Absolute coordinates (x ₁ , y ₁ )
Second coil: absolute coordinates (x ₂ , y ₂ ) = relative position (x = x ₂ −x ₁ , y = y ₂ −y ₁ )
In the third and subsequent coils, the calculation of the relative position is repeated up to the final coil as in the second coil (S25
(If the result is “No”).

  It is determined where the relative position (x, y) calculated as described above corresponds to the area in the eight divided pallets, and “left” or “right” in the left-right direction and “one column in the front-rear direction” The position corresponding to “eye”, “second column”, “third column”, or “fourth column” is determined.

  When the calculation up to the final coil is completed (when the determination in S25 is “Yes”), the relative position information of the coil placed on the pallet is transmitted to the host computer 1 (S26).

  The host computer 1 stores the transmitted information in the product information storage device 11, and transmits a movement command to the product unloading factory 3 to the carriage for which the coil has been loaded (S27).

  FIG. 4 shows an example of the relative position information of the coils placed on the pallet transmitted to the host computer 1. This relative position information is managed and stored for each pallet. Here, a pallet identification number for identifying the pallet is described, and the position on the pallet is divided into eight areas in this example, and in which area the coil of which product number is mounted, Corresponding to the product number of the coil. In the example of FIG. 3, the left and right direction of the area on the pallet is “left” or “right”, and the front and rear directions are “first column”, “second column”, “third column”, “fourth column”. However, the display method is not limited to this.

  FIG. 5 shows an example of a processing flow in the product unloading factory 3. First, at the stage when the transporting carriage with the coil placed on the pallet unloads the product and arrives at the factory 3, the pallet identification number of the pallet placed on the arriving transporting carriage is transmitted to the host computer 1, The coil product number and relative position information data corresponding to the pallet identification number are received from the host computer 1 (S31). Here, the received data is stored in a storage means (not shown) provided in the product unloading factory actual item management device 33.

  Next, when the coil is lowered from the pallet, it is determined whether or not the first coil to be lowered is the first coil loaded first in the product loading factory 2 (S32). Here, if it is the first coil (when the determination in S32 is “Yes”), the crane control device uses the crane position information (factory absolute coordinates) when lifting the coil of the first coil from the pallet. 32, for example, stored in a storage means (not shown) provided in the product unloading factory actual product management device 33 in association with the product number (coil number) of the coil (S33).

  Next, the processing after the second coil (when the determination in S32 is “No”) will be described. When the second and subsequent coils are lowered from the pallet, the crane position information (absolute coordinates in the factory) when the coil is lifted is obtained from the crane control device 32 as in the first coil. Next, based on the position information, a relative position with respect to the position of the first coil is calculated, and it is determined where in the area in the pallet divided into eight, and “left” in the left-right direction or Relative position information indicating where to correspond to “right”, “first column”, “second column”, “third column”, and “fourth column” in the front-rear direction is determined. The calculation of the relative position here can be performed in the same manner as the calculation method described in the product loading factory 2. The relative position information is associated with the product number (coil number) of the coil and stored in the storage means provided in the product unloading factory actual product management device 33 (S34).

  The calculation of the relative position of the lowered coil is repeated until the coil to be lowered from the pallet becomes the final coil (when the determination in S35 is “No”).

  When the calculation is completed up to the final coil (when the determination in S35 is “Yes”), the relative position information of the coil calculated in the product unloading factory 3 and the loading in the product loading factory 2 received in S31 above. The relative position information of the coils is compared (S36). Depending on the factory, the X and Y coordinates of the crane may be different. However, in this case, if the data that associates the direction in which the trolley is placed and the pallet is placed with the positive and negative of the X and Y coordinates of the crane in each factory is prepared in advance in this case, the correspondence is possible. Is possible.

  It is determined whether the relative position information of all the coils on the pallet matches (S37). If they match (if the determination in S37 is “Yes”), it is determined that the correspondence of the coils is normal, and a lowering operation is performed on the coils loaded on the next carriage (S38). ). If they do not match (if the determination in S37 is "No"), an alarm is given to the crane operator as an occurrence of a different material, and an operation reinstruction is issued (S39).

  In the above description, when the operation of lowering all the coils is completed, it is determined whether or not the relative position information matches (check for the presence or absence of different materials). You may make it judge whether it corresponds (check of the presence or absence of a different material).

It is a figure explaining arrangement | positioning of the coil on the pallet mounted on the trolley | bogie for conveyance. It is a figure which shows an example of a structure of the actual item management system which concerns on this invention. It is a figure which shows an example of the processing flow in the product loading factory which concerns on this invention. It is a figure which shows an example of the relative position information of the coil mounted on the pallet transmitted to a high-order computer in the product loading factory which concerns on this invention. It is a figure which shows an example of the processing flow in the product unloading factory which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Host computer 11 Product information storage device 2 Product loading factory 21 Crane 22 Crane control device 23 Product loading factory actual item management device 3 Product unloading factory 31 Crane 32 Crane control device 33 Product unloading plant actual item management device

Claims (3)

When loading and unloading a product on a pallet placed on a carriage, the position of the product loaded on the pallet is based on the position of the first product placed at a predetermined position on the pallet. An actual product management method comprising storing as relative position information, and managing the position of a product on a pallet based on the stored relative position information. When the product is loaded on the pallet placed on the carriage, the position information of the product loaded on the pallet is used as relative position information on the basis of the position of the product placed on the pallet. A product information storage step for storing in correspondence with the product number of
When the product is lowered from the pallet placed on the carriage, the position information of the product to be lowered from the pallet is calculated as relative position information based on the position of the product placed at a predetermined position on the pallet, And a relative position information comparison step for comparing the calculated relative position information with the relative position information stored in the product information storage step and corresponding to the product number of the product to be lowered from the pallet. Management method. When the product is loaded on the pallet placed on the carriage, the position information of the product loaded on the pallet is used as relative position information on the basis of the position of the product placed on the pallet. Product information storage means for storing corresponding to the product number of
When the product is lowered from the pallet placed on the carriage, the position information of the product to be lowered from the pallet is calculated as relative position information based on the position of the product placed at a predetermined position on the pallet, And a relative position information comparing means for comparing the calculated relative position information with the relative position information stored in the product information storing step and corresponding to the product number of the product to be lowered from the pallet. Management system.

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