JP2012144371A - Article management method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an article management method capable of accurately performing the management of an article such as a product steel sheet in storage in a storehouse or in a factory.SOLUTION: An RFID tag 12 recording information including the weight of each product steel sheet 11 is attached to each product steel sheet 11, and an RFID reader 24 is installed on a crane 10. When a product steel sheet 11A is conveyed to a yard or conveyed from the yard by the crane 10, information on the product steel plate 11A recorded in the RFID tag 12 attached to the product steel plate 11A is read by the RFID reader 24. When the conveyance of the product steel sheet 11A is recognized, a weight measurement result of the conveyed product steel plate 11A by a weighting machine 25 installed on the crane 10 is collated with the weight information on the conveyed product steel sheet 11A read by the RFID reader 24, whereby the consistence of a conveyance instruction is confirmed.

Description

  The present invention relates to an article management method for storing articles such as product steel plates in a warehouse or a factory.

  Conventionally, in the work of receiving the product steel plate manufactured at the steelworks into the warehouse and the operation of issuing from the warehouse, the crane operator carries the product steel plate into a predetermined place in the warehouse according to the warehousing instruction from the warehouse management computer, The product steel plate is carried out from a predetermined place in the warehouse in accordance with a delivery instruction from the warehouse management computer. At that time, the operator attracts and conveys one or more product steel plates with a riff mug attached to the crane (see, for example, Patent Document 1). When the operator completes the conveyance of the product steel plate, the operator visually confirms the number of conveyance and registers it in the warehouse management computer, which is reflected in the placement management information in the warehouse management computer.

JP 9-320844 A

  However, the product steel plate management method as described above has the following problems.

  The recognition of the number of transported product steel plates must be relied on by the operator's visual inspection, and it is difficult to save labor and is a manual operation, so there is a risk of mistakes in confirmation of the number of transported sheets and registration errors in the storage management computer.

  The present invention has been made in view of the above circumstances, and provides an article management method capable of accurately performing management when articles such as product steel plates are stored in a warehouse or a factory. It is intended.

  In order to solve the above problems, the present invention has the following features.

  [1] An article management method for storing articles in a warehouse, a factory or the like, wherein each article is attached with an RFID tag that records article information including at least the weight of the article, and an RFID reader is installed on the crane In addition, when one or more items are transported to a place by a crane or one or more items are transported from the place based on a transport instruction, they are recorded on an RFID tag attached to the article. When the article information is read by the RFID reader to recognize the conveyance of the article, a weighing machine for measuring the weight of the conveyed article is installed in the crane, and the weight measurement result of the conveyed article by the weighing machine The article management method is characterized in that the consistency of the conveying instruction is confirmed by comparing the weight information of the conveyed article read by the RFID reader.

  [2] The weight measurement result of the transported article by the weighing machine installed in the crane is compared with the weight of the transported article read by the RFID reader, and the weight of the transported article by the weighing machine and the transported article read by the RFID reader are compared. When the weights do not match, the operation of the crane is temporarily stopped, the transported article is confirmed, and the operation of the crane is restarted after the inconsistency in the transport instruction is resolved. ] The article | item management method of description.

  [3] When the article information recorded on the RFID tag includes information indicating that the actual weight of the transported article is different from the weight information recorded on the RFID tag attached to the transported article The item management method according to [1] or [2], wherein the consistency of the conveyance instruction is confirmed after correcting the weight information.

  In the present invention, it is possible to accurately perform management when storing articles such as product steel plates in a warehouse or a factory.

It is an elevation view which shows the product steel plate management method in one Embodiment of this invention. It is a flowchart of the product steel plate management method in one Embodiment of this invention. It is a figure which shows the case where a conveyance steel plate is a steel plate with an ear | edge in one Embodiment of this invention.

  One embodiment of the present invention will be described by taking as an example a case where a product steel plate manufactured at an ironworks is stored in a warehouse.

  FIG. 1 is an elevation view showing a product steel plate management method in a warehouse according to an embodiment of the present invention. As shown in FIG. 1, in this embodiment, when the product steel plate 11 manufactured at the steel mill is stored in the warehouse 10, the crane 21 places the product steel plate 11 in the warehouse 10 in accordance with the storage instruction from the warehouse management computer. When carrying in the predetermined place and taking out the product steel plate 11 from the warehouse 10, the crane 21 carries out the product steel plate 11 from the predetermined place in the warehouse 10 in accordance with the exit instruction from the warehouse management computer.

  At this time, in this embodiment, RFID (Radio Frequency IDentification) tags recording product information (for example, plate number, standard, customer, size (thickness, width, length, mass)) for each product steel plate 11 are used. 12 and an RFID (Radio Frequency IDentification) reader 24 is installed on the suspension beam 22 of the crane 21, and the product information of the product steel plate (one or more) 11 </ b> A being conveyed by the RFID reader 24. By reading, the warehouse management computer recognizes the conveyance of the product steel plate 11A.

  In that case, a weighing machine (load cell) 25 for measuring the weight of the conveyed product steel plate 11A is installed in the crane 21, and the weight measurement result of the product steel plate 11A by the weighing machine 25 is read and recorded in the RFID tag 12. By confirming the weight information of the product steel plate 11A, the consistency of the product steel plate 11A to be transported is confirmed.

  The specific procedure will be described with reference to the flowchart shown in FIG.

  (S1) The product steel plate 11A (three pieces here) is lifted by being attracted to the riff mug 23 of the crane 21.

  (S2) And it read from the RFID tag 12 attached to the weight measurement result (actual total weight) of the conveyed article which is the total weight of the three product steel plates 11A measured by the weighing machine 25 and the product steel plate 11A. A collation check is performed with the weight of the transported article (RFID total weight), which is the total weight of the three product steel plates 11A.

  (S3) As a result, when the actual total weight matches the RFID total weight (in the case of OK), the operation is continued as it is.

  (S4) On the other hand, when the actual total weight and the RFID total weight do not match (in the case of NG), the operation of the crane 21 is temporarily stopped. Then, the product steel plate 11A being transported is confirmed, the cause of the inconsistency is investigated, and the product steel plate 11A is put on hold. The cause is found, and after confirming that the inconsistency in the warehousing instruction and / or the warehousing instruction, which are transport instructions on the warehouse management computer, is resolved, the suspension is released and the operation of the crane 21 is resumed.

  Here, the judgment whether or not the actual total weight and the RFID total weight are the same is made when a certain threshold value is set in consideration of the measurement error of the weighing machine and a difference greater than the threshold value occurs. You may make it judge that it does not do.

  Based on these, the warehouse management computer has information on what product steel plate 11A obtained from the read RFID tag 12 is conveyed (conveyed product steel plate information), and what product steel plate 11 is located at which position. To maintain accurate placement information.

  Thereby, in this embodiment, it becomes possible to maintain accurate placement information without intervention of the crane operator except for the operation (S4). As a result, it is possible to completely prevent mistakes in checking the number of transported product steel plates, erroneous delivery, and the like. Further, since the number of conveyed product steel plates can be recognized without relying on the crane operator's visual observation, the labor saving of the crane operator can be achieved.

  In the above, when the crane 21 transports a plurality of product steel plates 11A at the same time, the article information recorded on the RFID tag 12 installed on the plurality of product steel plates 11A being transported by one RFID reader 24 is used. read. Then, the read article weights for each of the plurality of product steel plates 11A are totaled and compared with the weight measurement result of the conveyed article by the weighing machine 25 as the weight of the conveyed article.

  Incidentally, in the above, the steel plate (carrying target steel plate) transported by the crane 21 was the product steel plate 11A which was cut into product dimensions and became rectangular, but in some cases, the transporting steel plate is shown in FIG. Such a steel plate with ears 15 (rectangular part (product part) 15a, ear part 15b) that is not cut to the product dimensions may be used.

  Thus, when the steel plate to be transported is the steel plate 15 with ears, the weight information of the steel plate 15 with ears recorded in the RFID tag 12 is the weight of only the rectangular part (product part) 15a, and the ear part 15b. The weight of is not included. Therefore, in the above (S2), when the actual total weight measured by the weighing machine 25 and the total RFID weight read from the RFID tag 12 are collated and checked, the weight of the ear portion 15b becomes a difference, and the collation check is performed. It becomes NG and the possibility that the operation of the crane 21 is temporarily stopped (operation stop) is increased.

  Therefore, in order to deal with the problem, when the steel plate to be transported is the steel plate 15 with ears, the weight (order weight) recorded in the RFID tag 12 of the steel plate 15 with ears is corrected to the following correction weight. Then, the collation check in (S2) is performed. Here, information on whether the steel plate to be transported is the aforementioned product steel plate 11A or the steel plate 15 with ears is recorded in the RFID tag 12 as standard information.

(A) When one product is taken in the width direction, that is, there are ears 15b on both sides of the rectangular portion 15a. Corrected weight = order weight + {(rolling width−product width) × product thickness × product length X specific gravity x shape correction coefficient}
(B) When two products are taken in the width direction, that is, when the ear portion 15b is only on one side in the width direction of the rectangular portion 15a (when (a) is divided into two in the longitudinal direction)
Corrected weight = order weight + {(rolling width−steel plate product width−opposed steel plate product width) / 2 × product thickness × product length × specific gravity × shape correction coefficient}
here,
Rolling width: Final pass side guide measured value Shape correction factor: Factor set for each rolling condition (bending ratio) of the steel plate with the ear shown in Table 1 below

  Thereby, the accuracy of the weight data at the time of the collation check in (S2) is improved. As a result, the NG rate in the verification check is reduced, and the crane operating rate can be improved and the operator load can be reduced.

  For example, as a result of applying the present invention to 10 product transport cranes in a product warehouse in a plank factory, the operation rate of the crane has been improved from 85% to 90%.

10 warehouse 11 product steel plate 11A product steel plate to be transported (transport product steel plate)
12 RFID tag 15 Steel plate with ear 15a Rectangular part (product part)
15b Ear part 21 Crane 22 Hanging beam 23 Riff mug 24 RFID reader 25 Weighing machine

Claims (3)

  An article management method for storing an article in a warehouse, a factory, or the like, wherein an RFID tag recording article information including at least the article weight is attached to each article, and an RFID reader is installed in the crane. The article information recorded on the RFID tag attached to the article when one or more articles are transported to the place by a crane or one or more articles are transported from the place based on the transport instruction. When the conveyance of the article is recognized by reading the RFID reader, a weighing machine for measuring the weight of the conveyance article is installed in the crane, and the weight measurement result of the conveyance article by the weighing machine and the RFID An article management method comprising: checking consistency of a conveyance instruction by collating with weight information of a conveyance article read by a reader.   The weight measurement result of the transported article by the weighing machine installed in the crane is compared with the weight of the transported article read by the RFID reader, and the weight of the transported article by the weighing machine matches the weight of the transported article read by the RFID reader. If not, the operation of the crane is temporarily stopped, the conveyance article is confirmed, and after the inconsistency of the conveyance instruction is resolved, the operation of the crane is resumed. Article management method.   When the article information recorded on the RFID tag includes information indicating that the actual weight of the transported article is different from the weight information recorded on the RFID tag attached to the transported article, The article management method according to claim 1, wherein the consistency of the conveyance instruction is confirmed after correcting the weight information.

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