JP5654295B2 - Transportation plan creation apparatus, method and program - Google Patents

Description

  The present invention relates to an apparatus, a method, and a program for creating a daily transport plan when transporting a transported object such as a raw material or an intermediate product using a vehicle or the like.

  As described above, when transporting transported materials such as raw materials or intermediate products using a vehicle or the like, transport planning, that is, assembly such as transport destination and transport order, is significant not only for transport cost but also for work before and after transport. It is important because it affects. In particular, taking the production site as an example, when the capacity of the transfer facility is small compared to the preceding and following processes, the transfer facility becomes a bottleneck of the entire production site, and the importance of the transfer plan increases. Moreover, the importance of the said conveyance plan increases, so that the space which stocks a conveyance thing (intermediate product (work-in-process goods) between processes) before and after conveyance becomes narrow.

  However, especially in the case of the metal material industry, the capacity of several tens to several hundreds of tons is required even for transport equipment, and the scale of the equipment and construction costs are enormous, and the capacity cannot be easily increased. . The same applies to the stock space. For this reason, there are frequently cases where the conveyance capacity becomes the bottleneck.

  In order to solve such a problem, Patent Documents 1 and 2 have been proposed. In Patent Document 1, when transporting a load using a transport vehicle in which a traction unit and a load stacking unit can be separated, a transport route and a type of transport vehicle that can be used for each type of load are determined in advance. For each type, the transportable amount per predetermined time is obtained, and the transport route, the type of baggage, the transport request amount by time zone, and the transportable amount, and the transport route, baggage type, time zone This is a transfer plan creation device that improves the loading efficiency and shortens the waiting time by determining the type of transfer vehicle and collecting the packages for each type of transfer vehicle.

  Further, Patent Document 2 is based on the applicant of the present application, and in an apparatus for selecting one of the tanks in a plurality of factories and creating a payout work plan for carrying in the raw material by a conveyor, the allowable stock for each tank. By setting an upper limit and a lower limit, from the transfer speed, consumption speed, and inventory amount, the tank to be brought in can be started from the lower limit of inventory as much as possible, and the switching time should be set so that it can be carried in to the upper limit as much as possible. Thus, without using a complicated calculation method, the conveyance efficiency is high (the setup time for emptying the conveyor is small), and it is possible to avoid out of stock in the tank of the payout destination.

JP 2007-69997 A JP-A-2005-301813

  Patent Document 1 is a technique aimed at improving the operational efficiency of a transport vehicle, but a method for determining a transport method in the case where the above-described fundamental capacity shortage is predicted has not been clarified. Similarly, Patent Document 2 is a technique aiming to reduce the time interval (replacement), but a method for determining a transport method in the case where a fundamental lack of capability as described above is predicted is apparent. It wasn't.

  The problem will be described in more detail below. First, as an entire production facility, as shown in FIG. 1, an intermediate product 2 is produced from a raw material 1, and the work place 3 in the first step, which is the previous process, and the intermediate product 2 are finished into a final product 4. It is assumed that the work place 5 of the process 2 and the transfer equipment 6 that connects them are provided. The transport facility 6 includes a carriage on which the intermediate product 2 is loaded and a locomotive (not shown) that pulls the carriage. The raw material 1 is made of a rolled plate or bar, and the final product 4 is made of a wound thin plate or wire. And process 1 is a process of performing wrinkle inspection of intermediate product 2 and care when wrinkles are found. Step 2 is a rolling (drawing) step for obtaining the final product 4 from the intermediate product 2.

  Subsequently, as the capacities of the processes 1 and 2 and the transfer facility 6, the process 1 can stably perform processing at the same pace, and the dead time and cost associated with the change in setup are hardly generated. Further, the productivity of the process 1 is sufficiently higher than the productivity of the process 2 and the transfer facility 6. On the other hand, the productivity of step 2 is assumed to periodically change in units of a predetermined number of days. Furthermore, in the work place 5 of the process 2, the yard is limited, and it is not possible to have a large stock of the intermediate product 2, and the transport facility 6 also transports the intermediate product 2 from the process 1 in accordance with it.

  A description will be given of periodic fluctuations in productivity in the step 2. As described above, when the process 2 is considered as a rolling process of a metal product, usually, in the rolling process, if the size of the final product 4 is different, a change of a rolling roll or the like is required, and a setup change occurs. Since the setup time generated at that time greatly affects the productivity, products of the same size are manufactured together. In general, rolling is performed from the largest size, and when there is no longer the same size, a slightly smaller size is rolled, and finally the smallest size is rolled. The size referred to here is the width in the case of a plate material, and the diameter in the case of a wire material. The maximum size to the minimum size is called one cycle (predetermined unit period), and after one cycle of rolling is completed, the rolling from the maximum size is repeated again. Usually, large size rolling has little change from the intermediate product 2, so that productivity (ton / hour) is high, and small size rolling has low productivity. As a result, the productivity changes periodically as shown in FIG.

  Here, production and transportation are all performed in a predetermined unit, that is, in units of one day in FIG. 2, and the transportation facility 6 is operated one or more times from step 1 to step 2 within that one day. There is an upper limit to the carrying capacity of minutes. Further, as described above, it is assumed that the production plan of the process 1 having sufficient capacity for the conveyance of the intermediate product 2 and the productivity is determined in accordance with the production plan of the process 2 whose productivity fluctuates.

  FIG. 10 shows a conventional production and transportation plan created in this way. FIG. 10A is a diagram showing the production amount in step 2, that is, the type and quantity of the intermediate product 2 required for production on each day. The cycle is 5 days, and there are five types of intermediate products 2 (a), (b), (c), (d), and (e), and one type of production per day is performed. In the intermediate product 2, (a) has the largest size, and the size decreases in the order of (b), (c), (d), and (e), and the productivity decreases. Therefore, on the third day of producing the largest intermediate product (a), 13 final products 4 can be made from the intermediate product (a). On the seventh day of producing the smallest intermediate product (e), This shows that only one final product 4 can be made from the intermediate product (e).

  Corresponding to the production plan of the process 2 as described above, the transfer plan of the intermediate product 2 by the transfer facility 6 is as shown in FIG. That is, as described above, since the yard of the process 2 is narrow, the production plan of the process 2 shown in FIG. 10A is advanced as it is by one day. Therefore, 13 intermediate products (a) need to be transported on the second day, whereas only one intermediate product (e) needs to be transported on the sixth day. Then, the production plan in step 1 is as shown in FIG. 10C by moving up the transportation plan of FIG.

  Here, if the transfer capacity of the transfer facility 6 has the upper limit indicated by the reference symbol TH in FIG. 10B, the intermediate product (a) to be transferred on the seventh day or the eighth day. The intermediate product (b) cannot be transported in its entirety. In such a case, on the 6th or 5th day, specifically, the product on the 7th or 8th day, on which the transport capability is insufficient, will be transported forward on the day when the transport capability is surplus. Until now, there has been no technology to properly determine which products should be transported when.

  The object of the present invention is to convey a plurality of types of raw materials or intermediate products between the preceding and following processes, even if the conveying capacity of the conveying equipment is lower than the upper limit of the capacity of the subsequent process, the conveying equipment is a bottleneck in production. It is to provide a transport plan creation device, method, and program capable of suppressing the above.

Creating apparatus of the transfer plan for the present invention, between before and after the process, a plurality of kinds of raw materials or intermediate products, a producing apparatus of the transfer plan for transporting to the subsequent step from the previous step in a predetermined time period by a conveying equipment, the treatment of post-process, process each type of raw material or intermediate product for each said predetermined time period at a predetermined cycle, which processing capability of the rear step varies for each of the raw materials or intermediate products, the transport equipment Transfer capacity storage means for storing the transfer capacity, setting means for setting a production schedule in each period in the cycle in the subsequent process, and provisional provision of the raw material or intermediate product required in each period from the production schedule from a planned transport creating means for creating a planned transport, the transport capacity of the transport facility which is stored in the carrying capacity storage means, a planned transport of the temporary, transport to derive excess and deficiency of conveying capacity for each period A period in which there is a surplus in the transport capacity in the previous period for the raw material or intermediate product scheduled to be transported in a period when the transport capacity is insufficient from the excess / deficiency deriving means By embedding it in the transfer schedule and carrying it forward, the scheduled processing period is assigned from the previous raw material or intermediate product to the latter of the transfer capacity so that the type of raw material or intermediate product is classified. And a first transfer schedule revision means for creating a final transfer schedule in which the transfer amount and the period for transfer are determined.

The transport plan creation method of the present invention comprises a transport capacity storage means for storing the transport capacity of a transport facility and a production schedule storage means for storing a production schedule. product, a creation method for use in creating device transport plans for conveying from the previous step to a subsequent process in a predetermined period by the transport equipment, processing of the post-process, each type of raw material or intermediate at a predetermined period The product is processed every predetermined period, and the processing capacity of the post process varies for each raw material or intermediate product , and the creation device is within the cycle in the post process set by the user. production schedule for each period, and storing the scheduled production storage means, the creation device, from the production plan, to create a transport tentative of the raw materials or intermediate products required for each period Steps and, the creation device, the conveying capacity of the conveying equipment stored in the carrying capacity storage means, and a planned transport of the temporary, deriving excess or deficiency of the transport capacity in each period, the creation device However, based on the result of derivation of excess and deficiency, the raw material or intermediate product that is scheduled to be transported during the period when the transport capacity is insufficient is embedded in the transport schedule during the period when the remaining capacity is generated in the previous period. In the case of carrying forward transport, the scheduled processing period is allocated from the previous raw material or intermediate product to the latter of the transport remaining capacity, so that the transport amount and transport by type of the raw material or intermediate product are transferred. And a first transfer schedule revision step for creating a final transfer schedule for which a period to be determined is determined.

  According to the above configuration, in order to create a transportation plan for transporting a plurality of types of raw materials or intermediate products from the previous process to the subsequent process in a predetermined period by a transportation facility such as a vehicle or a conveyor between the preceding and following processes. In the apparatus and method of the above, the transporting capacity of the transport facility is lower than the production capacity of the post-process, and the process of the post-process processes each type of raw material or intermediate product at the predetermined period in a predetermined cycle However, when the processing capacity of the subsequent process varies for each raw material or intermediate product, the transport capacity of the transport facility may become a bottleneck in production. Create as follows.

  First, from the setting means, the user sets and stores a production schedule (type or quantity of raw material or intermediate product) in each period within the cycle in the subsequent process. Then, the transportation schedule creation means creates a provisional transportation schedule of the raw material or intermediate product required for each period from the production schedule and the rules regarding the transportation of the raw material or intermediate product, for example, the number of days before production. And remember. Subsequently, the transfer capability excess / deficiency deriving means derives and stores the excess / deficiency of the transfer capability in each period from the difference between the transfer capability of the transfer facility registered in advance and the temporary transfer schedule. This conveyance capability may be set as appropriate by the user according to the situation (convenient for vehicle operation, etc.).

  The first transfer schedule revision means for creating the final transfer schedule determines the temporary transfer schedule created by the transfer schedule preparation means as the final transfer schedule when the excess or deficiency does not occur. However, if the excess or deficiency occurs, there is a period in which there is room for the conveyance capacity before the period for raw materials or intermediate products that are scheduled to be conveyed in a period when the conveyance capacity is insufficient In this case, the provisional transfer schedule is revised so that the transfer is carried forward and embedded in the transfer schedule for that period. However, the first conveyance schedule revision means does not simply perform the forward conveyance, but assigns the processing schedule from the previous raw material or intermediate product to the latter of the remaining conveyance capacity. That is, the raw material or intermediate product to be processed first is transported later.

  Therefore, it is possible to realize an appropriate conveyance that can suppress a bottleneck of production even in a conveyance facility that has a time when the capacity is insufficient. Further, in the post-process, necessary raw materials or intermediate products are carried into the yard for stocking the raw materials or intermediate products so that the necessary raw materials or intermediate products are added in first-in first-out, that is, the processing schedule is Since an early intermediate product is on the near side in the yard or on the upper side when stacked (vertically stacked), it is not necessary to change the arrangement, and workability can be improved.

Furthermore, in the transportation plan creation apparatus of the present invention, at least some of the plurality of types of raw materials or intermediate products can be loaded, and a flag for setting whether or not loading is possible is set. The first transportation schedule revision means is created by assigning the transportation order to the front from the setting means and the flag, and from among the raw materials or intermediate products that can be carried forward, the materials can be stacked. The apparatus further comprises second conveyance schedule revision means for revising the final conveyance schedule.

In the transportation plan creation method of the present invention, the transportation plan creation device further includes a lower loading flag storage unit that stores a flag indicating whether or not the raw material or the intermediate product can be lower loaded. Storing a flag indicating whether or not each of the plurality of types of raw materials or intermediate products settable by the user is stored in the unloading flag storage means, and the creation device refers to the flag. The final transfer schedule created in the first transfer schedule revision step is revised by assigning the transfer order to the front from the raw materials or intermediate products that can be carried forward, And a second conveyance schedule revision step.

  According to the above configuration, the plurality of types of raw materials or intermediate products can be stacked, and further includes a lower loading flag setting means for setting a flag for determining the second loading schedule revision means. However, with reference to this flag, the final transfer schedule is created so that it is assigned earlier in the transfer order, that is, transferred first, from the ones that can be stacked.

  Therefore, the raw material or intermediate product can be stacked (vertically stacked) in the yard while taking into consideration the lower loading requirement allowed for each of the raw material or intermediate product, and the use space of the yard can be suppressed. In particular, when carrying forward transport, raw materials or intermediate products for normal transport will arrive later, so it is possible to obtain a large effect by turning the raw materials or intermediate products that can be loaded forward to the front. it can.

Furthermore, in the transport plan creation apparatus of the present invention, a stability index setting means capable of further setting an index indicating the stability when each of the raw materials or intermediate products is piled down, and the raw material or intermediate for carrying forward the transport When there are a plurality of products that can be stacked in the product, referring to the stability index, and assigning the transport order from the highest stability of the products that can be stacked, And a third conveyance schedule revision means for revising the final conveyance schedule revised by the second conveyance schedule revision means.

Further, in the transportation plan creation method of the present invention, the transportation plan creation device further comprises a stability index storage means for storing an index indicating the stability when the raw material or the intermediate product is underlayed, and the creation device, and storing the index indicating the respective raw materials or intermediate products each of said stability is set by the user, the stability index storage means, said creation device, from the flag, the accelerated transport When there are a plurality of materials that can be stacked in the raw materials or intermediate products of the raw materials or intermediate products to be performed, the index indicating the stability is referred to, and the index among the materials that can be stacked is high A third conveyance schedule revision step for revising the final conveyance schedule revised by the second conveyance schedule revision means by assigning a conveyance order to the front; It is characterized in.

  According to the above configuration, when there are a plurality of types of raw materials or intermediate products that can be stacked, it is possible to further set an index indicating the stability when the stacking is performed from the stability index setting means. The third transportation schedule revision means assigns the transportation order to the front from the one having the higher stability index when there are a plurality of the materials that can be stacked in the raw materials or intermediate products to be transported.

  Therefore, even when the raw materials or intermediate products are stacked (vertically stacked), high stability can be ensured.

  Furthermore, the transport plan creation program of the present invention is characterized by causing a computer to execute each step in the transport plan creation method.

  According to said structure, the preparation apparatus of a conveyance plan is realizable by making a computer perform said each processing step.

  As described above, the transportation plan creation apparatus, method, and program of the present invention creates a transportation schedule for transporting a plurality of types of raw materials or intermediate products by a transportation facility such as a vehicle or a conveyor between the preceding and following processes. In the process, the transfer facility has a lower transfer capacity than the production capacity of the post-process, and the post-process is processed in a predetermined cycle, and each type of raw material or intermediate product is processed every predetermined period. When the processing capacity fluctuates for each raw material or intermediate product, calculate the excess or deficiency of the conveyance capacity of the conveyance facility, and the raw material or intermediate product scheduled to be conveyed during the period when the conveyance capacity is insufficient, Prior to the period, the conveyance schedule in the period in which the remaining capacity is generated in the conveyance capacity is embedded so that the processing schedule is assigned from the previous raw material or the intermediate product to the latter of the remaining conveyance capacity, and the forward conveyance is performed.

  Therefore, even with a transport facility having a period when the capacity is insufficient, it is possible to realize appropriate transport so that it can be prevented from becoming a bottleneck in production. Further, in the subsequent process, necessary raw materials or intermediate products are carried in in a first-in first-out manner by the start of processing, so that rearrangement is unnecessary and workability can be improved. .

It is a schematic diagram of the whole production equipment on which the present invention is based. It is a graph which shows the periodic fluctuation of productivity of a back process. It is a functional block diagram of the preparation apparatus of the conveyance plan which concerns on one Embodiment of this invention. It is a figure for demonstrating the production schedule of a pre-process and a back process, and the conveyance schedule by one Embodiment of this invention in a conveyance installation. It is a figure for demonstrating the stock condition of the intermediate product in the post process by conveyance shown in the said FIG. It is a flowchart for demonstrating the preparation method of the conveyance plan by the preparation apparatus shown in FIG. It is a functional block diagram of the preparation apparatus of the conveyance plan which concerns on other forms of implementation of this invention. It is a figure for demonstrating the underlay flag used for the production apparatus shown in FIG. It is a figure for demonstrating the stability index used for the preparation apparatus shown in FIG. It is a figure for demonstrating the production schedule of a pre-process and a back process, and the conveyance plan by the typical prior art in a conveyance installation.

(Embodiment 1)
FIG. 3 is a functional block diagram of the transport plan creation apparatus 11 according to an embodiment of the present invention. The creation device 11 is realized by installing a transportation plan creation program in a personal computer having a peripheral circuit and a human interface in the arithmetic processing unit. FIG. 3 shows functional blocks constructed in a pseudo manner in the personal computer by installing the program. The creation device 11 also creates a schedule for transporting each day of the transport facility 6 in the production facility shown in FIG. 1, but the predetermined period is not limited to one day that is easy to understand, but half a day, 2 Arbitrary periods such as days and 3 days may be set. In addition, it is assumed that the process 1 has a margin in productivity and can be produced ahead of schedule.

  The production apparatus 11 includes a production schedule setting unit 12, a production schedule storage unit 13, a conveyance schedule creation unit 14, a first conveyance schedule storage unit 15, a conveyance capacity upper limit setting unit 16, and a conveyance capacity upper limit storage unit. 17, a conveyance capacity excess / deficiency deriving unit 18, a conveyance capacity excess / deficiency storage unit 19, a first conveyance schedule revision unit 20, and a second conveyance schedule storage unit 21.

  The production schedule setting means 12 is for the user to set the production schedule for each day in the step 2 over a unit period (here, 5 days). The setting contents are stored in the production schedule storage means 13. An example of the production schedule set by the production schedule setting means 12 is shown in FIG. 4 (a) and Table 1, and is the same as that shown in FIG. 10 (a). In Table 1, the third day is 13 intermediate products of type a, the fourth day is 10 intermediate products of type b, the fifth day is 7 intermediate products of type c, and the sixth day is type d 4 intermediate products and 1 intermediate product of type e on the 7th day are processed, and these 3rd to 7th days are used as a unit period, and the schedule from the 0th to the 13th day is planned. Has been created.

  The transportation schedule creation means 14 creates a provisional transportation schedule of the intermediate product 2 necessary for each day from the production schedule stored in the production schedule storage means 13 according to a predetermined rule. The created schedule is stored in the first transfer schedule storage means 15. An example of the provisional conveyance schedule created by the conveyance schedule creation means 14 is shown in FIG. 4B and Table 2, and is the same as FIG. 10B described above. In Table 2, since the predetermined rule is that the sheet is transported the day before production, the schedule in Table 1 is moved up by one day. Further, FIG. 4C shows the production schedule of step 1 which is similarly advanced one day.

  The transport capacity upper limit setting means 16 is for the user to set the upper limit value of the transport capacity for each day of the transport facility 6. The setting contents are stored in the conveyance capacity upper limit storage unit 17. An example of the upper limit value set by the transfer capacity upper limit setting means 16 is shown in Table 3. In Table 3, the upper limit of the transfer capacity of each day is the same at seven, but fluctuations due to locomotive changes, truck inspections, etc. may be taken into account. Setting may not be performed each time. In addition, the quantity of the upper limit value is not limited to the case where all the transportation is performed in one operation, and may be a total value of the quantities that are transported in a plurality of operations within the day, The upper limit value that can be transported in one day of the transport facility 6 is represented.

  The transport capacity excess / deficiency deriving means 18 includes the transport capacity TH of the transport facility 6 stored in the transport capacity upper limit storage means 17 and the temporary transport capacity stored in the first transport schedule storage means 15. The excess or deficiency of the conveyance capacity on each day is derived from the conveyance schedule. The derivation result is stored in the conveyance capacity excess / deficiency storage means 19. Table 4 shows an example of the excess and deficiency of the derived conveyance capacity. In the example of Table 4, there are 13-7 = 6 intermediate products of type a on the second day, and 10-7 = 3 intermediate products of type b on the third day. Similar shortages occur on the seventh, twelfth and eighth, thirteenth days five days after the unit period.

  The first transfer schedule revision unit 20 includes a temporary transfer schedule stored in the first transfer schedule storage unit 15 and an excess / deficiency amount of the transfer capability stored in the transfer capability excess / deficiency storage unit 19. Therefore, the intermediate products a and b scheduled to be transported on the days when the transport capacity is insufficient (7th and 8th days) are transported on the day before the day when the remaining capacity is generated in the transport capacity. Create a final transport schedule that is embedded in the schedule and transported forward.

  At that time, if it is normal, the intermediate product “a” to be processed earlier in time is considered to be conveyed earlier. In other words, three intermediate products a (= scheduled date is the seventh day) that are scheduled to be transported are transported on the fifth day when surplus power is first generated, and on the sixth day, the six remaining powers are used to transfer the intermediate product a. Consider that the remaining three of a and the intermediate product b that is scheduled to be transported are transported three by three. However, in that case, in the yard of step 2, the three intermediate products “a” that are carried quickly are stacked below, and the state shown in FIG. Therefore, the intermediate product “a” to be used first in the process 2 is piled down, and the intermediate product “b” to be used later is loaded thereon, which necessitates a rearrangement operation.

  On the other hand, as shown in FIG. 4 (d), the first transfer schedule revision means 20 assigns a scheduled processing date from the previous intermediate product a to the latter of the remaining conveyance capacity, and the scheduled processing date is A conveyance schedule is created so that it may be conveyed early from the subsequent intermediate product b. Therefore, all three intermediate products b are transported on the fifth day, and all six intermediate products a are transported on the sixth day. As a result, the yard of step 2 is in the state shown in FIG. 5 (b), and the intermediate product a with an earlier scheduled processing date comes up, and processing in step 2 can be performed without the need for rearrangement. It becomes. The final transfer schedule created by the first transfer schedule revision unit 20 is stored in the second transfer schedule storage unit 21.

  FIG. 6 is a flowchart for explaining the operation of the first transfer schedule revision means 20. In step S1, the variable i representing the date is reset to 0. In step S2, whether or not the i-th transport capacity (Table 4) stored in the transport capacity excess / deficiency storage means 19 is insufficient is generated. If there is no shortage, 1 is added to the variable i and updated in step S3. Further, in step S4, whether or not the variable i exceeds unit cycle N, that is, 5 in the above case. If it exceeds, the process ends. If not, the process returns to step S2.

  If there is a shortage in the i-th day carrying capacity (Table 4) in step S2, the process proceeds to step S5, and the i-th day carrying capacity deficiency is set in a variable k (Table 4). In this case, i = 2 and k = 6, i = 3 and k = 3). In step S6, 1 is subtracted from the date variable i, that is, a value that is incremented by one day is set in the variable j. In step S7, it is determined whether or not there is a transport margin m on the jth day. If there is a transport margin m, the process proceeds to step S8.

  In step S8, the amount that can be transported with the shortage k of the transport capacity on the i-th day, that is, the smaller value of m and k, is transferred to the transport margin m on the j-th day. In step S9, the variables m and k are updated with the difference between the transport margin m and the transport capacity deficiency k. Specifically, the larger of m−k and 0 is updated to a new variable m, and the larger of k−m and 0 is updated to a new variable k. Therefore, in step S8, if m ≧ k and the shortage k is resolved, the shortage k is updated to 0, and if there is still a transfer margin, the remaining amount is updated to m, and m <k If the shortage k has not been resolved, the transport margin m is updated to 0, and the shortage k is updated to km. In step S10, it is determined whether or not the shortage k has been eliminated. If it has been eliminated, the process proceeds to step S3 to confirm the next date.

  In step S10, if the shortage k has not been resolved, the process proceeds to step S11, and the variable j is traced back by another day, and further in step S12, the variable j is 0, that is, until the first day of the unit cycle. If the first day has been exceeded, it is determined in step S13 that it is impossible to carry forward and the process is terminated. If the date traced back in Step S12 is left, the process returns to Step S7, and the presence of the transport margin m is confirmed again on the traced date, and if there is no transport margin m, the process proceeds to Step S11. Further advance the date.

  As described above, the creation apparatus 11 according to the present embodiment transfers a plurality of intermediate products 2 of each type a, b, c, d, e between the work place 3 in the process 1 and the work place 5 in the process 2 to the transport facility 6. In creating the transport plan for transporting by the above, the transport capacity of the transport facility 6 is lower than the production capacity of the subsequent process 2, and the process of the process 2 is performed in units of a predetermined number of days (5 days). As a cycle, when each type of intermediate product 2 is processed every day, and its processing capacity varies for each type a, b, c, d, e of the intermediate product 2, a transportation plan is performed as follows. Create.

  That is, from the production schedule of the intermediate product 2 for each day in the process 2 set by the production schedule setting means 12, the conveyance schedule creation means 14 creates a temporary conveyance schedule for the intermediate product 2 necessary for each day, For the provisional transfer schedule, the transfer capacity excess / deficiency deriving means 18 derives the excess or deficiency of the transfer capacity for each day from the transfer capacity TH of the transfer facility 6 set by the transfer capacity upper limit setting means 16. From the result of derivation of the excess or deficiency, the first conveyance schedule revision means 20 is the day when the intermediate product scheduled to be conveyed on the day when the conveyance capacity becomes insufficient is the day when the remaining capacity is generated in the conveyance capacity. The intermediate product is embedded in the transfer schedule of the intermediate product and is transferred forward, and when the transfer is advanced, the final scheduled transfer date is created by assigning the processing scheduled date from the previous intermediate product to the later transfer capacity.

  Therefore, even in the transfer facility 6 having a time when the capacity is insufficient, it is possible to realize appropriate transfer so that it can be prevented from becoming a bottleneck in production. Further, in step 2, the necessary intermediate product 2 is carried into the yard where the intermediate product 2 is stocked by the start of processing so as to be the last-in first-out, that is, the intermediate processing date is early. When the product is on the near side in the yard or on the upper side when stacked (vertically stacked), the rearrangement is not required and the workability can be improved.

(Embodiment 2)
FIG. 7 is a functional block diagram of a transport plan creation device 11a according to another embodiment of the present invention. The creation device 11a is similar to the creation device 11 described above, and corresponding portions are denoted by the same reference numerals and description thereof is omitted. It should be noted that in this creating apparatus 11a, the transport schedule revised by the first transport schedule revision means 20 is further revised by the second transport schedule revision means 24 and the third transport schedule revision means 27. That is. For this reason, the creation device 11a has the above-described configuration of the creation device 11 in addition to the second transport schedule revision means 24 and the third transport schedule revision means 27, the lower stack flag setting means 22, the lower stack flag storage means 23, A stability index setting unit 25, a stability index storage unit 26, and a third transfer schedule storage unit 28 are provided.

  The unloading flag setting means 22 is for the user to set a unloading flag indicating whether or not the intermediate product 2 can be unloaded. This is because there is a difference in whether or not the intermediate product a, b, c, d, e having the same setup and productivity can be loaded. In particular, when there is a premise that the yard (intermediate product storage area) of process 2 is narrow, when a large amount of intermediate products 2 are in stock, it is necessary to stack the intermediate products 2. In such a case, it is necessary to consider the appropriateness of stacking and rearrangement of intermediate products, and appropriate selection is not easy. Therefore, this lower loading flag is used. In the transport facility 6, there is a demand for stacking in the same way when the carriage bed is narrow or the knitting is short.

  The underload flag is set as shown in FIG. 8, for example. FIG. 8 (a) is set to the above-described intermediate product a, and the intermediate products a1, a2, a3, a6, a7, and a13 are set to have the flag set, that is, set to be unloadable. The remaining intermediate products a4, a5, a8 to a12 are reset to indicate that they can be stacked. Similarly, FIG. 8B is set to the above-described intermediate product b, and the intermediate products b1, b3, b6, b7, and b9 are set to have a flag, that is, set to be unloadable. For the remaining intermediate products b2, b4, b5, b8, b10, the flag is reset, indicating that the products can be stacked.

  These flags are stored in the unloading flag storage means 23, and the second transfer schedule revision means 24 further refers to this flag for the transfer schedule stored in the second transfer schedule storage means 21. And revise the transportation schedule. Specifically, in the example shown in FIG. 4 described above, three intermediate products b2, b4, b5, b8, and b10 that can be stacked are selected for the three intermediate products b that are transported forward on the fifth day. . In addition, for the six intermediate products a conveyed forward on the sixth day, six are selected from the intermediate products a4, a5, a8 to a12 that can be stacked. As described above, this loading flag may also be referred to for loading into the transport facility 6. If the number of items that can be stacked is small compared to the number of items that can be carried forward, the products including the products that cannot be stacked can be conveyed and stacked at the top of the yard or separately stacked.

  Further, from the stability index setting means 25, the user sets the stability index of each intermediate product 2. This is because there are some that are stable and some that are not stable depending on the size and shape of the intermediate products a, b, c, d, and e. The stability index is set, for example, as shown in FIG. FIG. 9A is set to the above-described intermediate product a. For the sake of simplification of explanation, the intermediate product a1 to a13 has a larger stability index set as the product number is simply increased. Yes. Similarly, FIG. 9B is set to the above-described intermediate product b, and for the intermediate products b1 to b10, a smaller stability index is set as the product number increases. The stability index can be considered stable if the area of the upper and lower surfaces of the intermediate product is wide.

  These stability indices are stored in the stability index storage means 26, and the third transport schedule revision means 27 can be loaded on the transport schedule revised by the second transport schedule revision means 24. If there are more items than those to be carried forward, the stability index is further referred to and the transportation schedule is revised. Specifically, in the example of FIG. 4 described above, the three intermediate products b conveyed forward by the second conveyance schedule revision unit 24 on the fifth day are referred to the intermediate loading flag b2, b4. , B5, b8, and b10, any three of them are selected. In the third transport schedule revision means 27, referring to the stability index, intermediate products b2, b4, and b5 having high stability are obtained. Will be chosen. Similarly, any of the six intermediate products a to be transported forward on the sixth day by the second transport schedule revision means 24 is selected from the intermediate products a4, a5, a8 to a12 that can be stacked. In the third transfer schedule revision means 27, the intermediate products a12 to a8, a5 having high stability are selected with reference to the stability index. The final transfer schedule determined in this way is stored in the third transfer schedule storage means 28.

  As described above, the creation device 11a according to the present embodiment further includes the lower loading flag setting means 22 for setting a flag for discriminating the intermediate product 2 when there is any of the intermediate products 2 that can be lower loaded. The conveyance schedule revision means 24 refers to this flag, and prepares a conveyance schedule so that it can be assigned earlier in the conveyance order, that is, conveyed first, from those that can be stacked.

  Therefore, the intermediate products a, b, c, d, and e are stacked (vertically stacked) in the yard of step 2 in consideration of the lower stacking requirements allowed for each of the intermediate products a, b, c, d, and e. The space used in the yard can be suppressed. In particular, when the forward conveyance is performed, the intermediate product for the normal conveyance will arrive later, so that a large effect can be obtained by turning the intermediate product that can be loaded forward.

  Furthermore, in the creation device 11a of the present embodiment, when there are a plurality of types of intermediate products a, b, c, d, and e that can be stacked, the stability index setting means 25 is used for lower stacking. In addition, it is possible to further set an index indicating the stability of the case, and the third transport schedule revision means 27 includes a plurality of intermediate products a, b, c, d, e scheduled to be transported that can be stacked. In this case, the transport order is assigned to the front from the highest stability index.

  Therefore, even when the intermediate products a, b, c, d, and e are stacked (vertically stacked), high stability can be ensured.

DESCRIPTION OF SYMBOLS 1 Raw material 2 Intermediate product 3 Work place of process 1 4 Final product 5 Work place of process 2 6 Conveyance equipment 11, 11a Conveyance plan preparation device 12 Production schedule setting means 13 Production schedule storage means 14 Conveyance schedule preparation means 15 First conveyance schedule Storage means 16 Conveyance capacity upper limit setting means 17 Conveyance capacity upper limit storage means 18 Conveyance capacity excess / deficiency derivation means 19 Conveyance capacity excess / deficiency storage means 20 First conveyance schedule revision means 21 Second conveyance schedule storage means 22 Lower loading flag setting means 23 Lower loading flag storage means 24 Second conveyance schedule revision means 25 Stability index setting means 26 Stability index storage means 27 Third conveyance schedule revision means 28 Third conveyance schedule storage means a, b, c, d, e Intermediate Product

Claims (7)

A transport plan creation device that transports a plurality of types of raw materials or intermediate products from a previous process to a subsequent process in a predetermined period at a transport facility between the preceding and following processes ,
Treatment of the post-step processes each type of raw material or intermediate product for each said predetermined time period at a predetermined cycle, which processing capability of the rear step varies for each of the raw materials or intermediate products,
Transport capacity storage means for storing the transport capacity of the transport facility;
Setting means for setting a production schedule in each period within the cycle in the post-process;
From the production schedule, a transportation schedule creation means for creating a temporary transportation schedule of the raw materials or intermediate products required for each period;
A transport capacity excess / deficiency deriving means for deriving excess / shortage of the transport capacity in each period from the transport capacity of the transport facility stored in the transport capacity storage means and the provisional transport schedule;
From the derivation result of the excess or deficiency, the raw material or intermediate product scheduled to be conveyed in a period when the conveyance capacity is insufficient is embedded in the conveyance schedule of the period in which the remaining capacity is generated in the previous period and put forward. When carrying forward and carrying it forward, the scheduled processing period should be transported from the previous raw material or intermediate product to the rear of the transport remaining capacity, so that the transport amount by type of the raw material or intermediate product should be transported. A transportation plan creation device, comprising: a first transportation schedule revision means for creating a final transportation schedule determined for a period. At least a part of the plurality of types of raw materials or intermediate products has a lower loadable one, and a lower load flag setting means for setting a flag as to whether the lower load is possible,
The final transportation created by the first transportation schedule revision means by referring to the flag and assigning the transportation order to the front from the raw materials or intermediate products to be transported forward, from among those that can be stacked. The transportation plan creation device according to claim 1, further comprising second transportation schedule revision means for revising the schedule. Stability index setting means capable of further setting an index indicating the stability when each of the raw materials or intermediate products is stacked,
When there are a plurality of materials that can be stacked in the raw materials or intermediate products that are transported forward, the stability index is referred to, and the order of transport is determined in advance from the highest stability of the materials that can be stacked. 3. The transportation plan according to claim 2, further comprising third transportation schedule revision means for revising the final transportation schedule revised by the second transportation schedule revision means. Creation device. And a scheduled production storage means for storing the scheduled production and transport capacity storage means for storing a conveying capacity of the conveying equipment, between before and after the process, a plurality of kinds of raw materials or intermediate products, before the predetermined time period in the transport facilities It is a creation method used in a transportation plan creation device to transport from a process to a subsequent process ,
Treatment of the post-step processes each type of raw material or intermediate product for each said predetermined time period at a predetermined cycle, which processing capability of the rear step varies for each of the raw materials or intermediate products,
Storing the production schedule in each period within the cycle in the post-process set by the user in the production schedule storage means ;
The creation device creates a provisional transport schedule of the raw material or intermediate product required for each period from the production schedule;
A step wherein the creation device, for deriving the conveying capacity of the conveying equipment stored in the carrying capacity storage means, and a planned transport of the temporary, the excess and deficiency of conveying capacity for each period,
The preparation device transports raw materials or intermediate products that are scheduled to be transported during a period when the transport capacity is insufficient from the result of the excess / deficiency derivation during a period when there is a surplus in the transport capacity during the previous period. When carrying forward transport by embedding in the schedule, the scheduled processing period is assigned from the previous raw material or intermediate product to the latter of the transport surplus capacity, thereby transporting the raw material or intermediate product by type. A method for creating a transportation plan, comprising: a first transportation schedule revision step for creating a final transportation schedule in which an amount and a period for transportation are determined. The transportation plan creation device further includes a lowering flag storage unit that stores a flag indicating whether or not the raw material or the intermediate product can be lowered.
A step wherein the creating device, a plurality of types of raw materials or intermediate products whether flag is capable respective lowest social strata to be set by the user, is stored in the lowest social strata flag storage means,
The creation device refers to the flag and creates the first transportation schedule revision step by assigning the transportation order to the front from the raw materials or intermediate products that can be transported forward, from among those that can be stacked. 5. The transport plan creation method according to claim 4, further comprising a second transport schedule revision step for revising the final transport schedule. The transportation plan creation device further comprises a stability index storage means for storing an index indicating the stability when the raw material or the intermediate product is piled down,
A step wherein the creating device, the index indicating the respective raw materials or intermediate products each of said stability is set by the user, stored in said stability index storage means,
When the creation device has a plurality of materials that can be stacked in the raw materials or intermediate products among the raw materials or intermediate products to be carried forward from the flag, refer to the index indicating the stability, A third transportation schedule revision step for revising the final transportation schedule revised in the second transportation schedule revision step by assigning a transportation order to the previous one from the highest of the lower stackable ones The method according to claim 5, further comprising:   A transport plan creation program that causes a computer to execute each step in the transport plan creation method according to any one of claims 4 to 6.

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