JP2007269447A - Time informing method and the same device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To previously prevent generation of trouble by delayed arrival of a work on a machining line or the like. <P>SOLUTION: A management device 20 is applied to a storage facility provided with a storage warehouse 1 of a steel plate coil and a ceiling crane 12 for conveying a coil W in the storage warehouse 1. The management device 20 has a management device body provided with a stock information memory means for memorizing the number of stock of the coil W, a various data memory means for memorizing the maximum number of the coil W or the like placeable on a coil yard 10, and a transferring time operation means for operating an expectation time of a required time when the coil W to be conveyed is transferred from the coil yard to a conveying truck based on the information memorized in the respective memory means or the like according to conveying requirement of the coil W; and a display device for displaying the expectation time determined by the transferring time operation means as a forecasting value of the required time. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a time notification method and apparatus suitable for a storage facility for storing a cylindrical workpiece such as a steel plate coil used in a steel plate manufacturing process.

  Conventionally, in the steel sheet manufacturing process, the manufactured steel sheet coil is stored in a storage, transported as needed, transported to a processing line such as a cold rolling line, and the processing line while unfolding the steel sheet coil. In addition, a continuous rolling process is performed by welding and joining subsequent coils to the steel sheet.

In order to effectively use the storage space, the steel sheet coils are usually stored in a stacked state, for example, in two stages, and are transferred to the carriage one by one by a crane equipped in the storage when carrying out. It is transported to the processing line. At this time, since the storage location of the steel sheet coil is generally determined, in many cases, the operator detects the target steel sheet coil while visually confirming it, but there are many types of steel sheet coils. In addition, when there are a large number of storages, it is often impossible to accurately detect only with the experience and intuition of the operator. Therefore, it is accurate to determine which type of steel sheet coil is stored in which location of the complete management system, that is, the storage. In addition, a management system is introduced to manage steel sheet coils (for example, Patent Document 1).
JP-A-61-55023

  By the way, in a processing line such as a cold rolling line, the processing proceeds while sequentially connecting the next steel sheet coil to the preceding steel sheet as described above. It is conceivable to stop (line stop) automatically.

  For this reason, a steel plate coil take-out command is issued from the processing line side to the storage with sufficient time margin, but normally, on the processing line side, a carry-out command is issued at a fixed timing regardless of the location of the steel plate coil. For example, when a plurality of coils are required, all these coils are positioned in the lower part of the work stacked in a plurality of stages, and any of them can be carried out only after removing the upper steel sheet coil once. As a result, it takes time to take out the steel plate coil. As a result, it is considered that the case where the steel plate coil is thrown into the processing line is delayed and the operation is stopped as described above.

  The present invention has been made in view of such circumstances, and an object of the present invention is to prevent the occurrence of trouble due to the extension of a workpiece to a processing line or the like.

  In order to solve the above-mentioned problems, the applicant of the present application, when there is a work unloading request in a storage facility for storing a cylindrical work such as a steel plate coil, arranges the predicted value of the time required for unloading the work. If there is a possibility that the workpiece will be delayed, etc., consider that the operator can take action such as rushing the workpiece unloading work more than usual. Yes. In this case, for example, if a complete management system such as Patent Document 1 is introduced, the storage location of the workpiece can be accurately grasped, so that a more accurate value can be provided to the operator as a predicted value. However, it is expensive to introduce a complete management system, and there is a problem that flexibility is poor, such as a large software change is required when changing the layout in the storage. Therefore, the applicant of the present application has come up with the following time notification method including such problems.

  That is, according to the present invention, when a required workpiece is unloaded from a plurality of cylindrical workpieces stored in a storage area in response to a workpiece unloading request, a method for obtaining and notifying a predicted value related to the required time is disclosed. The workpieces are arranged in a direction orthogonal to the axial direction, and the upper workpiece is adjacent to the lower stage in the arrangement direction on condition that the workpiece is placed on the lower stage preferentially. While being stored in the storage area in a stacked state so as to be positioned between the workpieces, the required time is a workpiece that is positioned in the lower part of the stacked portion among the workpieces stored in the storage area in advance. A reference time for unloading the first-type work and a reference time for unloading the second-type work, which is a work other than the first-type work, are determined in accordance with the work-unloading request. Based on the number of workpieces in the storage area, the maximum number of workpieces that can be placed in the lower stage in the storage area, and the reference time, an expected value of the required time for the target workpiece is obtained, and the expected value is used as the predicted value. Notification is made (claim 1).

  According to this method, if workpieces are stored according to the condition that they are placed preferentially in the lower stage while being arranged in a direction perpendicular to the axial direction, and the number of stocks is managed, the exact location of the workpieces can be determined. There is no need to manage. In addition, since the number of workpieces in stock, the maximum number that is a known value, and an expected value of the required time for unloading the target workpiece based on a preset reference time are obtained and this is reported as a predicted value, it is simple. The predicted value can be obtained by simple calculation. In addition, by setting the reference time by taking actual work statistics, it is possible to obtain a predicted value that is somewhat reliable. For this reason, it is possible to notify a time with a certain degree of reliability as a predicted value of the required time when the work is carried out by a simple method.

  In this method, when the workpieces are stacked in the storage area, the workpieces are stacked on the condition that a workpiece having a small diameter is preferentially placed on the upper stage, while the workpieces stored in the storage area are Sort information according to the order of the diameter size of each work is created by sorting according to the size of the diameter, and when the work is requested to be taken out, it is placed at the bottom in the same area as the number of works in the storage area. Based on the maximum number of work pieces that can be placed, the presence or absence of an upper work is determined, and if there is an upper work, the target work is either the upper or lower work based on the diameter of the target work and the sort information. It is preferable that the expected value of the required time for the target work is obtained according to the determination result. Claim 2).

  According to this method, when there is a laminated portion in the work, it is determined whether the target work is placed in the upper stage or the lower stage based on the diameter of the work, and the expected value (prediction) is determined based on the determination result. Value), it is possible to report a more reliable predicted value.

  In the above method, when the workpieces are stacked in the storage area, it is preferable to stack the workpieces on the condition that the workpiece is placed on the lower workpiece that does not support other workpieces. (Claim 3).

  That is, when stacking and storing cylindrical workpieces, there are two possible cases: one workpiece in the lower stage supports two workpieces and one workpiece. Here, when the lower workpiece is carried out, in the former case, it is necessary to first move the two upper workpieces. In the latter case, it is only necessary to move one workpiece. Therefore, if the above conditions are not provided, the difference between the predicted value and the actual time increases depending on which of these two cases is applicable. Therefore, by providing the above conditions and limiting the lower work so as to always support only one work, it is possible to obtain and notify a more reliable predicted value.

  In each of the above methods, when a plurality of workpieces are requested to be carried out simultaneously, an expected value of the required time for each workpiece may be obtained, and the total value thereof may be reported as the predicted value (claim) Item 4).

  According to this method, it is possible to notify the predicted value of the required time when carrying out a plurality of assembled workpieces.

  Further, when the storage area includes a plurality of unit areas for storing different types of workpieces, and when a plurality of workpieces stored in the plurality of unit areas are simultaneously requested to be unloaded, a unit What is necessary is just to obtain | require the expected value of the said required time for every area, and to alert | report the sum total value as the said predicted value (Claim 5).

  According to this method, when a plurality of collective workpieces are carried out from a plurality of unit areas, it is possible to notify a predicted value of the required time.

  In each of the above methods, in addition to notifying the predicted value of the time required for unloading the workpiece, the estimated unloading completion time of the workpiece is obtained based on the expected value of the required time and the current time, and the estimated unloading completion time is calculated. You may make it alert | report as said prediction value (Claim 6).

  Further, in each of the above methods, it is determined whether or not there is a delay in the carry-out operation by comparing the predicted value with the target value, and when there is a delay, a predetermined work instruction together with the predicted value is determined. Is preferably reported (Claim 7).

  According to this method, the operator can surely recognize the work delay, and the operator can be made to take appropriate actions.

  On the other hand, the time notification device according to the present invention is arranged in a maximum of two stages on the condition that the cylindrical workpieces are preferentially placed on the lower stage while arranging the cylindrical workpieces in a direction orthogonal to the axial direction, and the upper stage work is provided. Work storage provided with a storage area that is stored in a stacked state so as to be positioned between adjacent works in the lower row in the arrangement direction, and an unloading means for carrying out the work stored in the storage area A device that is applied to equipment and notifies a predicted value related to the required time when a required workpiece is unloaded in response to a workpiece unloading request, and stores the number of workpieces in the storage area. Storage means, storage area information storage means for storing the maximum number of work pieces that can be placed in the lower stage in the storage area, and a lower part of the stacked portion of the work pieces stored in the storage area. A reference time that is preset as the required time for the first type work that is a workpiece to be stored, and a reference time that is preset as the required time for the second type work that is a work other than the first type work A time storage means, a calculation means for calculating an expected value of the required time for the target work based on information stored in each storage means in response to a work carry-out request, and predetermined information based on a calculation result by the calculation means Is provided as a predicted value. (Claim 8).

  According to this apparatus, when there is a workpiece unloading request, the expected value of the required time for the target workpiece is calculated by the calculation means based on the number of workpieces in stock, the maximum number of workpieces that can be placed in the lower stage in the storage area, and the reference time. The calculated value is notified to the operator or the like by the notification means as a predicted value.

  In this apparatus, the apparatus further comprises sort information creating means for creating sort information that defines the rank order of the diameter of each workpiece by sorting the workpieces stored in the storage area according to the size of the diameter, The computing means determines the presence or absence of an upper work in the work stored in the storage area based on the information stored in each storage means, and if there is an upper work, the target work is determined based on the sort information. It is preferable to discriminate between the upper stage and the lower stage and calculate the expected value of the required time for the target work according to these discrimination results (claim 9).

  That is, when stacking and storing cylindrical workpieces, in general, there is a tendency to place them preferentially on the upper stage from workpieces having a small diameter, but according to the above-mentioned apparatus, they are further stored in the sort information creating means. Based on the sort information, it is determined whether the target work is placed in the upper stage or the lower stage, and the expected value is obtained. Therefore, a more reliable predicted value can be notified.

  Further, in each of the above devices, when a plurality of works are simultaneously requested to be carried out, the calculation means obtains an expected value of the required time for each work and obtains a sum value thereof, and the notification means provides the sum It is preferable that the value is reported as the predicted value (claim 10).

  According to this device, when a plurality of workpieces are simultaneously requested to be carried out, it is possible to notify a predicted value for the total required time.

  Further, in each of the above devices, the calculation means can calculate the expected value of the required time for each unit area provided in the storage area for storing different types of workpieces. When a plurality of workpieces stored in the unit area are simultaneously requested to be carried out, the expected value of the required time of the workpiece is obtained for each unit area and the total value thereof is obtained, and the notifying means calculates the total value. It is preferable that the notification is made as the predicted value (claim 11).

  According to this apparatus, when an unloading request for unloading a plurality of workpieces from a plurality of unit areas is made, a predicted value for the total required time can be notified.

  Further, in each of the above-described devices, the calculation means obtains a predicted unloading completion time of the workpiece based on the expected value and the current time, and the notification means notifies the predicted unloading completion time as the predicted value. (Claim 12).

  In each of the above devices, the apparatus further includes a delay determination unit that determines whether or not there is a delay in work unloading work by comparing the predicted value and the target value, and the notification unit has a work delay It is preferable to notify a predetermined work instruction stored in advance together with the predicted value (claim 13).

  According to this configuration, the operator can reliably recognize the work delay and can appropriately deal with the delay.

  According to the working time notification method and the apparatus of the present invention, in response to a workpiece unloading request, the predicted value of the time required for unloading the workpiece can be obtained and notified to an operator or the like. Appropriate actions can be taken based on the values, and as a result, troubles caused by the extension of the workpiece to the processing line can be prevented. Moreover, according to the method of the present invention, the number of workpieces is managed while storing the workpieces in the storage area according to simple conditions, and based on this number of inventory and a known value such as a preset reference time. Since the expected value of the unloading time of the target work is obtained and notified as the predicted value, it is possible to obtain and notify the predicted value that is reliable to some extent by a simple and inexpensive method.

  A preferred embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 schematically shows a steel sheet coil storage facility to which a work time notification device (work time notification method according to the present invention) according to the present invention is applied. This storage facility is a storage facility for storing, for example, a steel plate coil to be processed in a cold rolling line, and includes a steel plate coil storage 1, a transport carriage 2, 3, and the like.

  The storage 1 (corresponding to the storage area according to the present invention) is a place for storing the steel sheet coil W manufactured in the hot rolling line until there is a request (unloading command) from the cold rolling line. A steel plate coil W (hereinafter abbreviated as “coil W”) is stored in a state where it is placed on a predetermined place (coil yard 10) provided in the storage 1. A storage part P1 of the coil W is provided on one side (left side in the figure) of the storage 1 and a delivery part P2 is provided on the other side (right side), respectively, so that the transport carriages 2 and 3 are stopped. ing. The transport carriage 2 stopped at the warehousing section P1 transports the coil W manufactured in the hot rolling line to the storage warehouse 1, and the transport carriage 3 stopped at the exit section P2 is transferred from the storage warehouse 1 to the cold rolling line. The coil W is conveyed.

  The transport carts 2 and 3 are semi-automatic self-propelled carts whose traveling operations are automatically controlled by a controller (not shown) except that the operator manually starts and stops traveling, for example. It is configured so that a single coil W can be loaded and conveyed.

  Above the coil yard 10, an overhead crane 12 (corresponding to the unloading means according to the present invention) is provided, and the coil W is loaded and unloaded on the transport carriages 2 and 3, and the coil W in the storage 1 is loaded. Movement is performed by the overhead crane 12. In this embodiment, the overhead crane 12 is operated by an operation of the operation unit 12a by the operator.

  In addition, a warehousing terminal 14 is installed in the warehousing section P1, and a warehousing terminal 15 is installed in the warehousing section P2, respectively. The information such as the type and number is input by the operator, and this input information is transferred from the terminals 14 and 15 to the management apparatus 20 described later.

  A command room 18 is further installed in the storage 1. The command room 18 is provided with a management device 20 for storing the stock status of the coils W in the storage 1.

  The management device 20 is composed of a personal computer, for example, and has a management device body 20a, a display device 20b, and an input device 20c as shown in FIG.

  The management apparatus main body 20a includes a well-known CPU that executes logical operations, a ROM that stores various programs for controlling the CPU in advance, a RAM that temporarily stores various data during a printing operation, and various data and software. It consists of HDD etc. to store, and as its functional configuration, it includes inventory information storage means 21, various data storage means 22, transfer time calculation means 23, display control means 24, communication means outside the figure, etc. While communicating with the management device outside the drawing of the rolling line and the terminals 14 and 15, predetermined information is provided to the operator via the display device 20b.

  The inventory information storage means 21 (corresponding to the inventory storage means according to the present invention) is stored in the storage 1 based on the warehousing information transferred from the warehousing side terminal 14 and the warehousing information transferred from the warehousing side terminal 15. Inventory information such as the type and number of coils W being stored is updated.

  The various data storage means 22 (the storage area information storage means according to the present invention) stores various data necessary for the calculation of the transfer time calculation means 23 described below. Specifically, the maximum number L of coils W that can be placed on the coil yard 10 (referred to as the maximum placement number L) and the unit time required to move the coils W stored in the storage 1 once. Various data such as T is stored.

  The unit time T is, for example, the crane work time when the coil W is transferred to the transport carriage 3 is accumulated for a certain period (for example, one day), and the accumulated value is divided by the total number of movements of the coil W. Average value. For example, when the coil W positioned in the lower stage among the coils W stacked in two upper and lower stages is transferred to the transport carriage 3 as will be described later, the coil W placed in the upper stage is once moved and then moved to the lower stage. The coil W will be transferred. In such a case, the number of movements of the coil W is counted twice and the crane working time per time is obtained.

  The transfer time calculation means 23 (corresponding to the calculation means according to the present invention) is a coil according to the request according to the request information of the coil W transmitted from the cold rolling line side, that is, the type and number of the coils W. Calculates the predicted value of the transfer time (corresponding to the workpiece unloading time) required to transfer W to the transport carriage 3, and completes transfer based on this predicted value and the time of the internal clock (not shown) The estimated time (corresponding to the estimated unloading completion time according to the present invention) is calculated. Note that the transfer time calculation by the transfer time calculation means 23 will be described later.

  The display control means 24 controls the display content by the display device 20b. When the request information of the coil W from the cold rolling line is input, the information (type and number of the coil W) and the transfer are transferred. Display control is performed so that the predicted value of the transfer time obtained by the time calculating means 23 and the estimated transfer completion time are displayed on the display device 20b.

  The display device 20b (corresponding to the notification means according to the present invention) is provided with a liquid crystal display and a CRT, and the input device 20c is provided with a keyboard and a mouse.

  Here, the calculation of the predicted value by the transfer time calculation means 23 will be described in detail.

  The transfer time calculating means 23 calculates a predicted value of the transfer time of the coil W on the assumption that the coil W is stored in the coil yard 10 according to the following storage conditions. Therefore, here, the storage conditions of the coil W in the storage 1 will be described first.

  In the storage 1, the coil W conveyed from the hot rolling line by the conveying device 2 is operated in the axial direction as shown in FIGS. 1 and 3A by the operator operating the overhead crane 12. Are placed in the coil yard 10 while being arranged in a direction orthogonal to the coil yard, and the coil W is stacked on the coil W previously placed only when the maximum number L of coils W is placed in the coil yard 10. Keep it while. At this time, the coil W is laminated by placing the coil W on the lower coil W that does not support other workpieces, and stacking the coil W on the portion between the adjacent coils W in the arrangement direction. However, stacking up to two levels is a condition. That is, the coils W are stacked on condition that the stacking method shown by the broken line in FIG. Then, at the time of entering and leaving the coil W, the operator operates the terminals 14 and 15 to input the information on the coil W related to entry or the information about the coil W related to delivery.

  Regarding the delivery of the coil W, when the target coil W is placed on the upper stage, the coil W is transferred as it is to the transport carriage 3 by the overhead crane 12, but the target coil W is located on the lower stage and the upper coil. When W is supported, the coil W stacked on the target coil W is temporarily placed on another coil W, and the target coil W is transferred to the transport carriage 3 in this state. In addition, when a situation occurs in which the empty space is generated in the lower stage and the coil W is present in the upper stage with the output of the coil W, the operator uses the time zone other than entering and leaving the upper coil. W is moved to an empty space on the lower stage, and the coil W is preferentially placed on the lower stage and stored in a state where the coils W are stacked in a maximum of two stages.

  On the premise that the coil W is stored in the storage 1 according to such storage conditions, the transfer time calculation means 23 is based on each information stored in the inventory information storage means 21 and the various data storage means 22. The expected value of the transfer time of the coil W is calculated as the expected value based on the following formula.

here,
Z: Expected value of total transfer time N: Requested number of coils W f (i): Expected value of transfer time when the i-th coil W is transferred to the transport carriage 3 T: Unit time Mi: i-th Number of coils W when stock coils W are transferred to the transport carriage 3 L: Maximum number of coils W that can be placed on the coil yard 10 (maximum placement number)
That is, according to the storage conditions of the coil W in the storage 1 as described above,
When Mi <L or Mi = L, all the coils W are placed directly in the coil yard 10 (that is, the coil W exists only in the lower stage). In order to transfer to the transport carriage 3, the coil W needs to be moved only once. Therefore, the expected value f (i) of the transfer time per coil W to be carried out is determined from the unit time T,
f (i) = T.

On the other hand, when Mi> L, the coil W has a laminated portion (a part of the coils W are stacked in two stages). In this case, in order to carry out the lower coil W (corresponding to the first type coil according to the present invention) of the laminated portion, first, the upper coil W is moved and temporarily placed, and then the lower coil W is carried out. Since it is necessary, the coil W is moved twice in total. That is, the transfer time of the coil W is 2T. The number of lower coils W located in the laminated portion is 2 (Mi-L), and the number of other coils W, that is, if the coils W are moved only once to be transferred to the transport carriage 3. The number of good coils W (corresponding to the second type coil according to the present invention) is −Mi + 2L (that is, Mi−2 (Mi−L)), and the transfer time is T. Therefore, when the expected value f (i) of the transfer time per coil W to be carried out is obtained,
f (i) = [2T · 2 (Mi−L) + T (−Mi + 2L)] / Mi
= T (3Mi-2L) / Mi
It becomes.

  Therefore, the expected value of the total transfer time when there is a command to carry out the N coils W from the rolling line is the sum of the expected values of the transfer time for each coil W, as shown in Equation 1 above.

  According to the storage facility as described above, when there is a command to carry out the coil W from the hot rolling line side, the content (type and number of the coils W) is displayed on the display device 20b. Accordingly, when the operator confirms the display and operates the overhead crane 12, the required coil W is transferred from the coil yard 10 to the transport carriage 3.

  At this time, in addition to the type and number of the coils W, the display device 20b displays the predicted transfer time required to transfer the coils W to the transport carriage 3 and the estimated transfer completion time. The Rukoto. Therefore, the operator can check the time and time and perform appropriate work. That is, for example, when it is determined that there is not much room when calculating backward from the work start time in the cold rolling line, the transfer work of the coil W is performed more quickly than usual, and if necessary, by the transport carriage 3 By switching the conveying speed of the coil W to a higher speed than usual, it is possible to avoid the extension of the coil W to the cold rolling line. In addition, when it is determined that the extension cannot be avoided by such measures, it is possible to avoid the actual extension by switching the operation of the cold rolling line to a slower speed than usual. Therefore, it is possible to prevent the occurrence of a situation in which the operation of the coil W to the cold rolling line is delayed and the operation is stopped.

  Moreover, in the management device 20 described above, the unit time T as described above is determined in advance as the crane work time required to move the coil W once, and the transfer time is set for the coil W located at the lower stage of the stacked portion. 2T (reference time of the first type coil according to the present invention) is determined, while for other coils W, the transfer time is determined as T (reference time of the second type coil according to the present invention). Since it is configured to obtain the expected value of the transfer time of the coil W, it is possible to provide the operator with a predicted value that is somewhat reliable with a simple and inexpensive configuration (method). There is an advantage that flexibility for 10 layout changes and the like is good.

  That is, the inventory management is performed by introducing a complete management system such as Patent Document 1 described in the background art, for example, the crane working time when moving the coil once is determined as a unit time, and the expected value of the transfer time is set. It is possible to ask for it. According to this, since what type of coil is stored where in the storage is accurately managed, it is possible to obtain a more reliable predicted value. However, it is necessary to strictly manage the position of the coil, so the software becomes complicated and expensive, and the flexibility that the software must be drastically changed each time the layout of the coil yard is changed, etc. Is bad. On the other hand, according to the configuration of the above embodiment, if the inventory number Mi is accurately managed, the expected value (prediction) of the transfer time is based on the known values (maximum placement L, unit time T). (Value) is calculated, the software is simple and inexpensive, and the expected value (predicted value) is obtained based on the unit time T as described above, so that a certain degree of reliability can be ensured. In addition, regarding the layout change of the coil yard 10 or the like, no software change is required as long as the maximum placement number L does not change. Also, when the area of the coil yard 10 is changed, the maximum placement number As long as the setting value of L is changed, it is possible to cope with the change easily and quickly without making any significant change on the other software. Therefore, it is possible to provide a predicted value that is reliable to some extent to the operator with a simple and inexpensive configuration (method), and there is an effect that flexibility in changing the layout of the coil yard 10 is good.

  Next, a second embodiment of the present invention will be described.

  The storage facility of the second embodiment is basically the same as that of the first embodiment, but the management device 20 determines the estimated transfer time of the coil W in consideration of the height of the coil W, that is, the diameter. The configuration is different from that of the first embodiment in the point to be obtained.

  That is, in the first embodiment, the diameter of each coil W is considered to be substantially constant, but the actual diameter of the coil W varies depending on the type and the like. Therefore, in the second embodiment, when the coils W are stacked, the coils W are stored in the storage 1 on the condition that the coils W are preferentially placed on the upper stage from the one having a smaller diameter. (Refer to FIG. 3B), the management device 20 (transfer time calculation means 23) is configured to obtain a predicted value of the transfer time of the coil W on the assumption of this storage condition. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and only differences are described in detail.

  In the second embodiment, the inventory information storage means 21 and the transfer time calculation means 23 are configured as follows. That is, the inventory information storage means 21 is common to that of the first embodiment in that inventory information such as the type and number of coils W stored in the storage 1 is renewably stored. Based on the value of the diameter of the coil W inputted as information, the sort information defining the rank order of the diameter of each coil W is created by sorting the coils W according to the diameter. . That is, in this embodiment, the inventory information storage means 21 also has a function as the sort information creation means of the present invention.

  Then, the transfer time calculating means 23 is configured to calculate the predicted transfer time value and the expected transfer completion time in consideration of this sort information. Specifically, the expected value (predicted value) of the transfer time of the coil W is calculated based on the following equation.

here,
Z: Expected value of total transfer time N: Requested number of coils W f (i): Expected value of transfer time when the i-th coil W is transferred to the transport carriage 3 T: Unit time Mi: i-th Number of coils W at the time of transferring the coils W to the transport carriage 3 L: Maximum number of coils W that can be placed on the coil yard 10 (maximum placement number)
Qi: Order from the small diameter side in the inventory of the coil W to be transferred i-th, that is, according to the storage conditions of the coil W as described above,
When Mi <L or Mi = L, all the coils W are placed directly in the coil yard 10 (that is, the coil W exists only in the lower stage). In order to transfer to the transport carriage 3, the coil W needs to be moved only once. Therefore, the expected value f (i) of the transfer time per coil W to be carried out is determined from the unit time T,
f (i) = T.

In the case of Mi> L, there are laminated portions in a part of the stored coils W (a part of the coils W are stacked in two stages), and the number is (Mi-L). . Here, since Qi is the order from the smaller diameter side of the coils W in stock, when Qi <(Mi−L) or Qi = (Mi−L), the coil W is placed on the upper stage. It is thought that. Therefore, the expected value f (i) of the transfer time per coil W to be carried out is the same as above,
f (i) = T.

On the other hand, when Mi> L and Qi> (Mi−L), the value of Qi is larger than the number of coils W stacked on the upper stage, so that the coil W is placed on the lower stage. It is thought that there is. The number of lower coils W located in the stacked portion is 2 (Mi-L), and the transfer time of the coils W is 2T. The number of lower coils W other than that is 3L-2Mi (that is, L-2 (Mi-L)), and the transfer time is T. Therefore, when the expected value f (i) of the transfer time per coil W when Mi> L and Qi> (Mi−L) is obtained,
f (i) = [2T · 2 (Mi−L) + T (3L−2Mi)] / L
= T (2Mi-L) / L
It becomes.

  Therefore, the expected value of the total transfer time when there is a command to carry out N coils W from the rolling line is the sum of the expected values of the transfer time for each coil W, as shown in Equation 2 above.

  According to such a configuration of the second embodiment, since the predicted value of the transfer time of the coil W is obtained in consideration of the diameter of the coil W as described above, a more reliable predicted value is provided to the operator. It becomes possible. That is, in the storage 1, the coil W having a small diameter is generally preferentially placed in the upper stage. However, when the diameter of the coil W is not considered as in the first embodiment, for example, the coil for the unloading request It can be considered that there is a large difference in the actual transfer time between the case where W is only a small diameter and the case where only W is a large diameter. On the other hand, according to the configuration of the second embodiment, the estimated value of the transfer time is determined by determining whether the coil W to be carried out is placed in the upper stage or the lower stage in consideration of the diameter of the coil W. Therefore, there is an effect that the reliability of the predicted value becomes higher.

  Here, as shown in FIG. 4, taking the case where a required one is taken out from the coil W placed in the coil yard 10 and transferred to the transport carriage 3, an estimated value of the total transfer time is obtained by the management device 20. And the case where the estimated value of the total transfer time is obtained based on the so-called complete management system.

  As shown in FIG. 4, eleven types of coils W identified by numbers 1 to 11 are placed on the coil yard 10, and the first coil W is placed on the fourth and fifth coils W. The second coil W is stacked on the sixth and seventh coils W, and the third coil W is stacked on the eighth and ninth coils W, respectively. The maximum number L placed in the coil yard 10 is “8” as shown in the figure, and the number assigned to the coil W matches the rank from the small diameter side in the stock of the coil W. It shall be.

  Then, assuming that the time required to move the coil W once is a unit time T, the total transfer when a command to carry out the second, fifth, eighth, and first coils W in this order is issued. Consider the case where the loading time is required.

  First, according to the complete management system, since the location of the coil W to be carried out can be grasped, the movement of the coil W necessary for transferring No. 2, No. 5, No. 10, No. 1 to the transport carriage The number of times is “1”, “2”, “1”, and “1”, respectively. Therefore, the predicted value of the total transfer time is 5T.

  On the other hand, when the predicted value of the total transfer time is obtained by the management device 20 (that is, based on the above formula 2), the following is obtained.

First, for the second coil W,
From Mi = 11, L = 8, and Qi = 2, Mi> L and Qi <(Mi-L). Therefore, the expected value f (1) of the transfer time of the second coil W is
f (1) = T
It becomes.

For No. 5 coil W
From Mi = 10, L = 8, and Qi = 4 (since the second coil W is carried out), Mi> L and Qi> (Mi−L).

Therefore, the expected value f (2) of the transfer time of the fifth coil W is
f (2) = T (2Mi−L) /L=1.5T
It becomes.

For the 10th coil W,
From Mi = 9, L = 8, and Qi = 8 (because the second and fifth coils W are carried out), Mi> L and Qi> (Mi−L).

Therefore, the expected value f (3) of the transfer time of the 10th coil W is
f (3) = T (2Mi-L) /L=1.25T
It becomes.

For the first coil W,
From Mi = 8, L = 8, and Qi = 1, Mi = L. Therefore, the expected value f (4) of the transfer time of the first coil W is
f (4) = T
It becomes.

Therefore, the expected value Z of the total transfer time is
Z = f (1) + f (2) + f (3) + f (4)
= T + 1.5T + 1.25T + T = 4.75T.

  Thus, the predicted value (4.75T) of the total transfer time obtained by the management apparatus 20 is a value close to the predicted value (5T) obtained based on the complete management system, and the total transfer time is predicted. It can be seen that the information can be provided to the operator with a certain degree of reliability.

  The coil W storage facility described above is an example of an embodiment of a storage facility to which the work time notification device (work time notification method according to the present invention) according to the present invention is applied. The specific configuration of the working time notification device as well as the specific configuration and the specific working time notification method can be appropriately changed without departing from the gist of the present invention. For example, the following configuration (method) may be employed.

  (1) As shown in FIG. 5, the storage 1 has a coil yard 10 divided into a plurality of unit areas 11a to 11d, and a common coil W classified based on components and plate widths. It may be stored in 11a to 11d. In this case, when there is a simultaneous carry-out request for the plurality of coils W stored in the plurality of unit areas 11a to 11d, the transfer of the coil W is performed based on the above-described Equation 1 or Equation 2 for each of the unit areas 11a to 11d. The expected value of the loading time may be obtained, the sum of the expected values for each unit area may be obtained as the expected value of the final total transfer time, and this may be displayed on the display device 20b as the predicted value. That is, the expected value of the total transfer time may be obtained based on the following formula 3.

here,
Z: Expected value of total transfer time (total value)
Zj: Expected value of total transfer time in each area In this case, when the operator inputs the area information for storing the coil W when the coil W is received, the inventory information for each unit area 11a to 11d May be stored in the stock information storage means 21 and the maximum placement number L for each of the unit areas 11a to 11d may be stored in the various data storage means 22. Then, when a carry-out command is input to the management device 20, the transfer time calculation means 23 determines the number of unit areas 11a to 11d and coils W to be carried out, and the transfer time for each unit area as described above. And the sum of the expected values for each unit area may be calculated as the expected value for the total transfer time.

  (2) In the embodiment, after predetermined unit time T required to move the coil W once, the coil W positioned in the lower stage of the laminated portion (corresponding to the first type coil according to the present invention) The reference time for carrying out the coil W is 2T, and the reference time for carrying out the other coil W (corresponding to the second type coil according to the present invention) is T, and an expected value f of the time required for carrying out the coil W Although (i) is calculated | required, you may employ | adopt time other than this as reference time at the time of carrying out a 1st type | mold and 2nd type | mold coil. For example, the time required for carrying out the first type coil may be actually measured for a certain period to obtain an average value, and this value may be used as the reference time. The same applies to the reference time for the second type coil.

  (3) In the embodiment, on the condition that the coil W is placed on the lower coil W that does not support other workpieces, that is, the stacking is not performed as shown by the broken line in FIG. The coil W is allowed to be stacked on the condition, but the stacking method shown by the broken line in FIG. However, in this case, there are two cases, one case where the lower one coil W supports two coils W and the case where only one coil W is supported (example of the above embodiment). When the workpiece (that is, the first type coil) is carried out, in the former case, it is necessary to temporarily place the upper two coils W, whereas in the latter case, it is only necessary to temporarily place the upper coil W. It will be. Therefore, it can be considered that the difference between the predicted value and the actual time increases depending on which case the target coil W corresponds to. Therefore, in order to ensure the reliability of the predicted value, the coil W is placed on the lower coil W that does not support other workpieces as in the embodiment (indicated by a broken line in FIG. 3A). It is preferable to stack the coils W on the condition that they are not stacked as shown.

  (4) In the management device 20 of the embodiment, when there is a command to carry out the coil W, the content, the predicted value of the transfer time of the coil W, and the expected transfer completion time are displayed on the display device 20b. In response to this, the operator takes necessary actions based on his / her own judgment. For example, the transfer operation of the coil W to the transport carriage 3 is performed more quickly than usual, or the traveling speed of the transport carriage 3 is increased. However, for example, such a specific work instruction (guidance) may be displayed together with the display device 20b. For example, whether or not there is a delay in the work of unloading the coil W by comparing a calculation result (for example, transfer completion expected time) by the transfer time calculation means 23 with a target value (target time) transmitted from the cold rolling line side. Further, the management device 20 (management device main body 20a) is further provided with a delay determining means for determining whether or not there is a work delay, and a specific work instruction (guidance) is displayed together with the expected transfer completion time on the display device. You may comprise so that it may display by 20b. In this way, it is possible for the operator to surely understand that the work delay has occurred, and the operator can quickly and appropriately respond to the work delay by confirming the work instruction on the display device 20b. As a result, it is possible to more reliably avoid the extension of the coil W to the cold rolling line.

  (5) In addition to displaying the work instruction (guidance) as described above, an operation for avoiding the extension of the coil W to the cold rolling line may be performed by automatic control. For example, when there is a possibility that the coil W may extend to the cold rolling line, a control signal is output from the management device 20 to the controller of the transport carriage 3 so that the traveling speed is automatically increased by a certain rate. You may comprise.

It is a schematic diagram which shows the storage equipment of the steel plate coil to which the working time alerting device (working time alerting method according to the present invention) according to the present invention is applied. It is a block diagram which shows the structure of the management apparatus 20 integrated in the storage facility. It is a schematic diagram which shows the storage method of the coil in a storage ((a) is a figure which shows the basic how to pile up a coil, (b) is a figure which shows how to pile up the coil from which a diameter differs). It is a plane schematic diagram which shows the state of the coil stored in the coil yard. It is a plane schematic diagram which shows the example which divided | segmented the coil yard into the several unit area.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Storage 2,3 Carriage cart 12 Overhead crane 14 Unloading side terminal 15 Unloading side terminal 18 Command room 20 Management apparatus 20a Management apparatus main body 20b Display apparatus 20c Input apparatus 21 Inventory information storage means 22 Various data storage means 23 Transfer time calculation Means 24 Display control means

Claims (13)

When carrying out a required workpiece from a plurality of cylindrical workpieces stored in a storage area in response to a workpiece unloading request, a method for obtaining and notifying a predicted value related to the required time,
The workpieces are arranged in a direction orthogonal to the axial direction, with the condition that the workpieces are preferentially placed on the lower stage, and the upper workpiece is placed between adjacent workpieces on the lower stage in the arrangement direction. While storing in the storage area in a stacked state to be positioned,
As the required time, a reference time for unloading the first type work, which is a work located in the lower part of the stacked portion among the work stored in the storage area, and a work other than the first type work. Set the reference time when carrying out the second type work,
In response to a workpiece unloading request, an expected value of the required time for the target workpiece is obtained based on the number of workpieces in the storage area, the maximum number of workpieces that can be placed in the lower stage in the storage area, and the reference time. A time notification method that notifies the expected value as the predicted value. The time notification method according to claim 1,
When laminating the workpiece, while laminating the workpiece on the condition that the workpiece having a small diameter is preferentially placed on the upper stage,
Sort information that defines the rank order of the diameter of each workpiece by sorting the workpieces stored in the storage area according to the size of the diameter,
When a work unloading request is made, the presence or absence of an upper work is determined based on the number of works in the storage area and the maximum number of work placed in the lower stage in the storage area. Further, based on the diameter of the target workpiece and the sort information, it is determined whether the target workpiece is placed in the upper stage or the lower stage, and an expected value of the required time related to the target workpiece is obtained according to these determination results. Time notification method. In the time alerting method according to claim 1 or 2,
When laminating workpieces in the storage area, the time alerting method is characterized in that the workpieces are laminated on the condition that the workpiece is placed on a lower workpiece that does not support other workpieces. In the time alerting method according to any one of claims 1 to 3,
A time notification method characterized in that, when a plurality of workpieces are simultaneously requested to be carried out, an expected value of the required time for each target workpiece is obtained and a total value thereof is reported as the predicted value. The time notification method according to any one of claims 1 to 4,
When the storage area includes a plurality of unit areas for storing different types of workpieces, and when a plurality of workpieces stored in the plurality of unit areas are simultaneously requested to be carried out, A time notification method characterized in that an expected value of the required time is obtained and the total value thereof is notified as the predicted value. The time notification method according to any one of claims 1 to 5,
A time notification method characterized in that a predicted unloading completion time of a work is obtained based on an expected value of the required time and a current time, and the predicted unloading completion time is notified as the predicted value. The time notification method according to any one of claims 1 to 6,
By comparing the predicted value with its target value, it is determined whether or not there is a delay in carrying out work, and when there is a delay, a predetermined work instruction is notified together with the predicted value. Time notification method. The cylindrical workpieces are arranged in a direction orthogonal to the axial direction, and are preferentially placed on the lower stage, with the condition that the upper workpiece is placed in the upper direction of the adjacent workpieces on the lower stage in the arrangement direction. It is applied to a work storage facility comprising a storage area for storing in a stacked state so as to be positioned in between, and an unloading means for unloading the work stored in this storage area. When unloading a workpiece, it is a device that obtains and notifies a predicted value related to the required time,
Stock storage means for storing the number of stocks of workpieces in the storage area;
Storage area information storage means for storing the maximum number of workpieces that can be placed in the lower stage in the storage area;
In response to a work unloading request, a reference time set as the required time of the work located in the lower part of the stacked portion of the work stored in the storage area and the required time of the other work, and the respective times Computing means for computing an expected value of the required time for the target work based on information stored in the storage means;
A time notifying device comprising: notifying means for notifying predetermined information based on a calculation result by the calculating means as the predicted value. In the time alert device according to claim 8,
Sort information creating means for creating sort information defining the rank order of the diameter of each workpiece by sorting the workpieces stored in the storage area according to the size of the diameter,
The computing means determines the presence or absence of an upper work in the work stored in the storage area based on the information stored in each storage means, and if there is an upper work, the target work is determined based on the sort information. A time notification device characterized by determining whether it is placed in an upper stage or a lower stage, and calculating an expected value of the required time for the target work according to the determination results. In the time alert device according to claim 8 or 9,
When the calculation means is requested to carry out a plurality of workpieces at the same time, the expected value of the required time for each workpiece and the sum value thereof are obtained,
The notification unit notifies the total value as the predicted value. The time notification device according to any one of claims 8 to 10,
The calculation means is capable of calculating the expected value of the required time for each unit area provided in the storage area for storing different types of work, and stored in the plurality of unit areas. When a plurality of workpieces are requested to be carried out at the same time, the expected value of the required time is obtained for each unit area and the total value thereof is obtained.
The notification unit notifies the total value as the predicted value. The time notification device according to any one of claims 8 to 11,
The calculation means obtains an expected completion time of carrying out the workpiece based on the expected value and the current time,
The time notification method characterized in that the notification means notifies the predicted completion time of carry-out as the predicted value. The time notification device according to any one of claims 8 to 12,
A delay determining means for determining whether or not there is a delay in work unloading work by comparing the predicted value and the target value;
The notification device notifies a predetermined work instruction stored in advance together with the predicted value when a work delay occurs.

Images