JP5460531B2 - 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 a transported object such as a raw material or an intermediate product is transported using a vehicle or the like, a transport plan, that is, assembly such as a transport destination and a transport order is important. Particularly in the case of the metal material industry, even a transportation facility is a large scale of several tens to hundreds of tons, which requires enormous energy and personnel and increases the transportation cost.

  Therefore, Patent Document 1 and Patent Document 2 have been proposed in order to perform efficient conveyance. 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 transport lot creation device that improves the loading efficiency and shortens the waiting time by determining the type of transport vehicle and collecting the packages of transport units for each type of transport 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 technology that improves the conveyance efficiency based on the conveyance amount in a certain unit of time, the type of package, and the requested transport amount by time zone, but the receiving side of the package (raw material and intermediate product (work in process)) The circumstances of (post-process) are not particularly considered. In other words, when stocking luggage, stacking (vertically stacking) or flat stacking requires removing the luggage placed in the front in order to take out the stock that has been placed in the back. . In particular, the problem becomes more conspicuous as the stocking yard space becomes narrower.

  On the other hand, Patent Document 2 is a technique aiming at reducing the time interval (replacement), and considers stock (amount of stock), but does not consider the transportable amount or the type of luggage. Moreover, since the bulk material by a conveyor is conveyed, like the patent document 1, especially a device is not required for how to stack in a yard.

  An object of the present invention is to provide a transportation plan that can perform transportation in consideration of the situation of the cargo receiving on the subsequent process side when transporting a plurality of types of raw materials or intermediate products in a predetermined transportation lot between the preceding and following processes. It is to provide a creation device, method and program.

  The transportation plan creation device of the present invention is a transportation 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 between the preceding and following processes. When the processing is performed at a predetermined cycle and each type of raw material or intermediate product is changed for each predetermined period, setting means for setting a production schedule in each period within the cycle in the subsequent process; and From the production schedule, the transportation schedule creation means for creating a provisional transportation schedule of the raw materials or intermediate products required for each period, the transportation capacity of the transportation facility, and the transportation capacity in each period from the provisional transportation schedule A material or medium that is scheduled to be transported during a period when there is a margin in the transport capacity based on the transport capacity determination means that determines whether the margin is sufficient, and the determination result of the transport capacity and the transport capacity of the transport facility If there are multiple combinations that can be merged, determine whether or not the products can be merged, and assign the raw material or intermediate product by assigning the scheduled processing period from the previous raw material or intermediate product to the latter of the transfer margin. It includes a transport schedule revision means for creating a final transport schedule in which a transport amount for each type of product and a period for transport are determined.

  The transportation plan creation method of the present invention is a transportation plan creation method in which a plurality of types of raw materials or intermediate products are transported from a previous process to a subsequent process in a predetermined period between the preceding and following processes. A step of setting a production schedule in each period within the cycle in the post-process when processing of the process is performed by changing each type of raw material or intermediate product for each predetermined period in a predetermined cycle; and From the production schedule, a provisional transportation schedule of the raw materials or intermediate products required in each period, a transportation capacity of the transportation facility, and a provisional transportation schedule, a margin of transportation capacity in each period From the step of determining the adjustment, the determination result of the transfer capability and the transfer capability of the transfer facility, between the raw materials or intermediate products scheduled to be transferred in a period when there is a margin in the transfer capability If there are multiple combinations that can be merged, the processing schedule period is allocated from the previous raw material or intermediate product to the latter of the transfer margin, so that And a step of creating a final transfer schedule in which a transfer amount and a period to be transferred are determined.

  According to said structure, in the apparatus and method for preparing the conveyance schedule for conveying several types of raw materials or intermediate products with conveyance facilities, such as a vehicle and a conveyor, between processes before and behind, the process of a post process is carried out. In the present invention, when carrying out by changing the type of the raw material or the intermediate product at a predetermined cycle and every predetermined period, the present invention creates the transfer schedule as follows.

  First, the user sets and stores the production schedule (type or quantity of raw material or intermediate product) for each period in the subsequent process from the setting means. Then, the transportation schedule creation means creates the provisional transportation schedule of the raw materials or intermediate products required on each day from the production schedule and the rules regarding the transportation of the raw materials or intermediate products, for example, the number of days before production. And remember. Subsequently, the transfer capability determination means determines and stores a margin of 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.).

  Then, the transportation schedule revision means for creating the final transportation schedule determines whether or not the raw materials or intermediate products scheduled to be transported during a period when the transportation capacity is sufficient, and there are combinations that can be merged. In this case, a merged transfer schedule, that is, a transfer schedule for transferring the raw material or intermediate product to be transferred later, is created, and the provisional transfer schedule is revised so as to reduce the number of transfers. At this time, if there are a plurality of combinations that can be merged, the transfer schedule revision means assigns the process schedule period from the previous raw material or intermediate product to the rear of the transfer margin. That is, the raw material or intermediate product to be processed first is transported later.

  Therefore, the transportation cost (energy and personnel) can be reduced by reducing the number of periods for transportation. Further, in the subsequent process, the 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 processed in a first-in first-out manner, that is, the processing schedule is early. Since the intermediate product is on the front side in the yard or on the upper side when stacked (vertically stacked), it is not necessary to change the location and workability can be improved. Can be carried out.

  Furthermore, in the transportation plan creation apparatus of the present invention, at least a part of the plurality of types of raw materials or intermediate products can be stacked, and an index indicating the stability when the stacked can be set. Stability index setting means is further provided, and the transport schedule revision means refers to the stability index when there are a plurality of materials that can be stacked in the raw materials or intermediate products scheduled to be transported in the same period, The final transport schedule is created by assigning the transport order from the one with the highest stability to the front.

  Further, in the method for creating a transportation plan according to the present invention, at least a part of the plurality of types of raw materials or intermediate products includes those that can be stacked, and a step of setting an index indicating the stability when the stacked materials are stacked. Further, in the preparation step of the final transportation schedule, when there are a plurality of materials that can be stacked in the raw materials or intermediate products scheduled to be transported in the same period, the stability index is referred to and the stability index is referred to. The conveyance order is assigned to the front from the one with the higher index.

  According to the above configuration, when there is a material that can be stacked in the plurality of types of raw materials or intermediate products, the stability index setting unit can set an index that indicates the stability when the material is stacked. The 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 materials that can be stacked in the raw materials or intermediate products to be transported.

  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. Further, even when the raw materials or intermediate products are laminated (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 case where the processing of the post-process is performed at a predetermined cycle and by changing the type of the raw material or the intermediate product every predetermined period, there is a margin in the transport capacity from the adjustment of the transport capacity in each period. Judge whether the raw materials or intermediate products scheduled to be transported during the period can be merged, and if there are combinations that can be merged, create a merged conveyance schedule, and at that time, there are multiple combinations that can be merged In this case, the processing schedule is assigned from the previous raw material or intermediate product to the rear of the conveyance margin.

  Therefore, the transportation cost (energy and personnel) can be reduced by reducing the number of transportation periods. Further, in the subsequent process, the 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 processed in a first-in first-out manner, that is, the processing schedule is early. Since the intermediate product is on the front side in the yard or on the upper side when stacked (vertically stacked), it is not necessary to change the location and workability can be improved. Can be carried out.

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 figure for demonstrating the production schedule of a back process, and the conveyance schedule by one Embodiment of this invention in a conveyance installation. 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 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 the other aspect of implementation of this invention. It is a flowchart for demonstrating the preparation method of the conveyance plan by the preparation apparatus shown in FIG. It is a flowchart for demonstrating the preparation method of the conveyance plan by the preparation apparatus shown in FIG. It is a flowchart for demonstrating the preparation method of the conveyance plan by the preparation apparatus shown in FIG.

(Embodiment 1)
FIG. 1 is a schematic diagram of the entire production facility on which the present invention is based. As shown in FIG. 1, the production facility as a premise of the present invention is to produce an intermediate product 2 from a raw material 1, and finish the work place 3 of the previous step 1 and the intermediate product 2 into a final product 4. Suppose that it is provided with the work place 5 of the process 2 which is a post process, and the conveyance equipment 6 which connects them. 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, in the present embodiment, the productivity in step 2 is assumed to periodically change in units of a predetermined period. 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 referred to as one cycle (the predetermined period), and when 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 units of one day, but the predetermined period is not limited to one day that is easy to understand, but an arbitrary period such as a half day, two days, or three days is set. May be. The transportation facility 6 is operated one or more times from step 1 to step 2 within the range of the day, and has an upper limit on the transportation capacity for the day. 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.

  The production plan created in this way is shown in FIG. FIG. 3 (a) and Table 1 are diagrams showing the production amount of the process 2, that is, the type and quantity of the intermediate product 2 required for production on each day. The one cycle is 5 days, and the intermediate product 2 has five types (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 second day of producing the largest intermediate product (a), 14 final products 4 can be made from the intermediate product (a). On the sixth day of producing the smallest intermediate product (e), This shows that only three final products 4 can be made from the intermediate product (e).

  Corresponding to the production plan of the process 2 as described above, a normal conveyance plan of the intermediate product 2 using the conveyance 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. 3A and Table 1 is advanced by one day as it is. Accordingly, 14 intermediate products (a) need to be transported on the first day, whereas only three intermediate products (e) need to be transported on the fifth day. Then, the production plan in step 1 is also advanced by one day from the conveyance plan of FIG. 3B as it is. In addition, it is assumed that the transfer facility 6 has an upper limit of the transfer capability indicated by reference symbol TH in FIG.

  It should be noted that in the method for creating a transport plan according to an embodiment of the present invention, the transport capacity margin on each day shown in FIG. ) In the second to fifth days), determine whether or not the intermediate products b, c, d, e scheduled to be transported can be merged, and if there is a combination that can be merged, create a merged transport schedule In this case, when there are a plurality of combinations that can be merged, as shown in FIG. 3C, the scheduled processing date is assigned from the previous intermediate product to the rear of the transport margin.

  Specifically, in the case of FIG. 3B, since the intermediate products b and c on the second day and the third day are necessary for production on the next day in step 2, as shown in FIG. Transport as scheduled. However, on the second and third days, the intermediate products d and e on the fourth and fifth days, which are not necessary immediately, are also transported forward by an amount equivalent to the transport margin up to the upper limit TH. At this time, if the intermediate product d on the 4th day is the second day and the intermediate product e on the 5th day is the third day, the loading status of the yard of process 2 is simply 3D, in this embodiment, the intermediate product e to be used later is the second day of the earlier one, and the intermediate product d to be used first is the third day of the later one. Eyes. As a result, the loading situation in the yard of step 2 is as shown in FIG. 3E, and the need for transshipment is eliminated on the fourth day when the intermediate product d is used.

  In the example of FIG. 3, the number of intermediate products a, b, c, d, and e is 14, 11, 8, 6, and 3, respectively. On the 14th day, 11 + 3 = 14 on the 2nd day, 8 + 6 = 14 on the 3rd day, both of which are within 14 or less of the upper limit TH of the transfer capacity of the transfer facility 6, but if not, The intermediate product d on the 4th day with a large number of conveyances is conveyed as it is, and the intermediate product e on the 5th day with a small number of conveyances is distributed and distributed on the 2nd to 4th days, or the middle of the 4th day with the early conveyance date. The product d may be distributed and transported on the second and third days, and the intermediate product e on the fifth day may be transported as it is on the fourth day, which is one day earlier, or on the original fifth day. These may be determined according to the convenience of management of the intermediate products d and e in the yard of the process 2 and the state of loading on the carriage of the transport facility 6.

  FIG. 4 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 including a peripheral circuit and a human interface (input / output unit) 13 in the information processing device 12. The information processing apparatus 12 is not limited to a single unit, and may be composed of a plurality of units, or various servers such as a Web server may be used. FIG. 4 shows functional blocks constructed in a pseudo manner in the personal computer by installing the program. This creation device 11 also creates a transportation plan for the transportation facility 6 in the production facility shown in FIG. In addition, it is assumed that the process 1 has a margin in productivity and can be produced ahead of schedule.

  The information processing apparatus 12 includes a production schedule record management unit 21, a production schedule date storage unit 22, a scheduled transfer date derivation unit 23, a scheduled transfer date storage unit 24, a transfer capability upper limit management unit 25, and a transfer capability upper limit. Storage unit 26, transport capacity surplus deriving unit 27, transport capacity surplus storage unit 28, transport management unit record management unit 29, transport management unit storage unit 30, transport schedule revision unit 31, transport determination date storage unit 32.

  From the human interface (input / output unit) 13, the production schedule record management unit 21 allows the user to set the production schedule for each day in step 2 shown in FIG. Here, it is set over 5 days). The set contents are stored in the scheduled production date storage unit 22. The scheduled delivery date deriving unit 23 is based on the contents stored in the scheduled production date storage unit 22 based on a predetermined rule (in the case of FIG. ) And the transfer schedule of each day by the transfer facility 6 shown in Table 2 are derived. The derivation result is stored in the scheduled transfer date storage unit 24.

  On the other hand, in the transport capacity upper limit management unit 25, the user sets the upper limit TH of the transport capacity for each day in the transport facility 6 shown in Table 3 from the human interface (input / output unit) 13. In Table 3, in correspondence with FIG. 3B described above, the upper limit TH is constant at 14 for each day for simplification of description. The setting contents are stored in the conveyance capacity upper limit storage unit 26.

  The transport capacity surplus deriving unit 27 subtracts the transport capacity upper limit TH stored in the transport capacity upper limit storage unit 26 from the transport schedule of each day stored in the scheduled transport date storage unit 24, and The margin of the capacity | capacitance of the conveyance equipment 6 in each day as shown by is calculated. The calculation result is stored in the transport capacity surplus storage unit 28.

  In the transport management unit record management unit 29, the user sets the transport management unit of the transport facility 6 shown in Table 5, that is, the operation cycle and its first day, from the human interface (input / output unit) 13. . In Table 5, as described above, the first day is set every five days from the first day, with an operation cycle of 5 days. The first day of the cycle may be set arbitrarily. In Table 5, the transport management units are numbered. These settings are stored in the transport management unit storage unit 30.

  The transport schedule revision unit 31 stores, for each transport management unit stored in the transport management unit storage unit 30, the transport schedule stored in the scheduled transport date storage unit 24 and the surplus transport capacity storage unit 28. Compared with the margin of the transport capability that has been carried out, as shown in FIG. 3B to FIG. 3C described above, the intermediate product to be transported forward and the transport date are derived, and the transport schedule is modified. The modified final transport schedule is stored in the transport determination date storage unit 32.

  FIG. 5 is a flowchart for explaining the operation of the transport plan creation apparatus 11 configured as described above. In step S 1, the production schedule date of each intermediate product is input and recorded from the human interface (input / output unit) 13 to the production schedule record management unit 21. In step S2, the scheduled delivery date deriving unit 23 derives the scheduled delivery date of each day from the storage contents of the scheduled production date storage unit 22, and stores it in the scheduled delivery date storage unit 24 in step S3.

  On the other hand, in step S4, the upper limit TH of the transfer capacity for each day of the transfer facility 6 is set from the human interface (input / output unit) 13 to the transfer capacity upper limit management unit 25, and the setting contents are as follows. It is stored in the transport capacity upper limit storage unit 26. In response to this, in step S5, the surplus transport capacity deriving unit 27 starts the transport schedule stored in the transport capacity upper limit storage section 26 from the transport schedule of each day stored in the planned transport date storage section 24. The upper limit TH of the capacity is subtracted to calculate the capacity margin of the transport facility 6 on each day, and the calculation result is stored in the transport capacity surplus storage unit 28 in step S6.

  In step S7, a transfer management unit of the transfer facility 6, that is, an operation cycle and its first day are set from the human interface (input / output unit) 13 to the transfer management unit record management unit 29. In step S8, The setting contents are stored in the transport management unit storage unit 30.

  In step S9, the transport schedule revision unit 31 performs the transport schedule stored in the planned transport date storage unit 24 and the transport capability for each transport management unit stored in the transport management unit storage unit 30. The surplus storage unit 28 is compared with the margin of the transport capability, the intermediate product to be transported forward and the transport date are derived, and the transport schedule is modified. The modified final transport schedule is stored in the transport determination date storage unit 32 in step S10. The method for determining the date to be forwarded is to fill all the number of transports in one day from the first day of the transport management unit to the transport capacity upper limit TH, and from the next day after the last filled to the last day of the transport management unit. This is done by setting the target date ahead. Specifically, assuming that the number of days in the transport management unit is n and the number of transports on the i-th counting from the first day of the transport management unit is αi, first, the total transport number x is calculated by the following formula.

  Next, the transport capacity upper limit TH is gradually subtracted from the total number x in order from the first day, and the transport management unit starts from the day after i (i + 1 day) when x ≦ 0. The last day (nth day) is moved forward to be the transport target day. Further, of the days other than the advance target day, the day having the margin of the transport capability obtained in step S5 is set as the forward target day. It is also possible to reduce the calculated advance transportation target date and set it as the forward transportation target date.

  As described above, the advance method is assigned in order from the intermediate product with the earliest scheduled production date as described above, on the late date of the target date for advance. At this time, on each day, the forward movement is performed so as to be within the range of the margin value of the conveyance capacity obtained in step S5. The calculation method will be described in detail below with reference to FIG. 3 again.

  FIG. 3A and FIG. 3B show the production amount of the process 2 and the conveyance amount of the conveyance facility 6, respectively. The transport management unit is set every five days from the first day. In this case, the total number of conveyances in the conveyance management unit is 14 + 11 + 8 + 6 + 3 = 42. Therefore, since the upper limit TH of the capacity of the transport facility 6 is the aforementioned 14, the amount can be transported in 3 days. Therefore, the remaining capacity remains so that all of the transportation on the fourth day and the fifth day can be advanced by the second day and the third day. In this case, considering the transportation cost, it is considered that the intermediate products d and e that were scheduled to be transported on the fourth and fifth days should be transported on the second and third days, respectively. That is, the second day and the third day are the above-mentioned advance transportation target days, and the fourth and fifth days are the forward transportation target days.

  At that time, normally, the intermediate product d (= the scheduled transportation date is the fourth day) with the earlier scheduled transportation date is transported on the second day when the remaining capacity is first generated, and the intermediate product is transported on the third day. A schedule is created so that three pieces of d and e are conveyed. However, in that case, in the yard of step 2, the state is as shown in FIG. 3D, and the intermediate product d whose production schedule date is early is piled up, and the intermediate product e whose production schedule date is late is on top. It will be. For this reason, a labor for rearrangement is required.

  Therefore, the working day of the transportation facility 6 is advanced on the second and third days, which are the objects to be transported ahead, but the intermediate product d whose transportation scheduled date is early is advanced and the later day in the transportation target days. The intermediate product e, which is scheduled to be transported late, is moved forward on the third day, and the second day, which is the earliest day among the transport target days, is advanced. Thus, as shown in FIG. 3C, the yard is in the state shown in FIG. 3E by transporting three intermediate products e on the second day and six intermediate products d on the third day. Thus, the intermediate product d whose production schedule date is early is on the upper side, and production in the process 2 is possible without causing trouble of rearrangement. The production amount of step 2 in FIG. 3, the conveyance amount of the conveyance facility 6, the symbol of the intermediate product, etc. are examples, and the values may be different.

  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 a transport plan for transporting by the above, the process of the process 2 which is a subsequent process processes each type of intermediate product 2 every day in units of a predetermined number of days (5 days), and the processing capacity is When the intermediate product 2 varies for each type a, b, c, d, e, a transportation plan is created as follows.

  That is, when the user sets the production schedule (the type and quantity of the intermediate product 2) for each day in the process 2 which is a subsequent process from the production schedule record management unit 21 which is a setting means, the conveyance schedule creation means. The scheduled delivery date deriving unit 23 creates a temporary delivery schedule for the intermediate product 2 required for each day from the production schedule and the rules for the conveyance of the intermediate product 2, while the conveyance capability surplus serving as a conveyance capability determination means The deriving unit 27 determines whether or not there is a margin of the conveyance capacity for each day from the difference between the conveyance capacity upper limit TH of the conveyance facility 6 registered in advance from the conveyance capacity upper limit record management unit 25 and the temporary conveyance schedule. Then, the transport schedule revision unit 30 determines whether or not the intermediate products (b, c, d, e in FIG. 3) scheduled to be transported on the day when the transport capacity is sufficient can be merged. If a match exists, To create a transport plan to engaged. Therefore, it is possible to reduce the transportation cost (energy and personnel) by reducing the number of transportation days.

  Further, when the provisional transportation schedule is merged and revised, the transportation schedule revision unit 30 determines that the intermediate product (e in the example of FIG. ) To the later of the transport margin, that is, the intermediate product (d) to be processed first is transported later. Therefore, in step 2, the necessary intermediate product is carried into the yard where the intermediate product is stocked by the start of processing so as to be last-in first-out, that is, an intermediate product whose processing schedule date is early. In the yard, as shown in FIG. 3 (e), when stacked (vertically stacked), it becomes the upper side, so that it is not necessary to rearrange, and workability can be improved, and thus step 2 It is possible to carry out transportation in consideration of the situation of the side receiving the cargo.

(Embodiment 2)
FIG. 6 is a functional block diagram of a transport plan creation apparatus 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 the creation device 11a, when the conveyance schedule is revised by the conveyance schedule revision unit 31a, the human interface (input / output unit) 13 sets the stability index management unit 33 to store the stability index. That is, the stability index stored in the unit 34 is reflected. That is, in the above-described transport schedule revision unit 31, although the types of the intermediate products a, b, c, d, and e are classified, the stability when the individual products are loaded is not considered, and the transport schedule is advanced. Was assembled. However, among intermediate products with the same setup and productivity, there are high and low stability products depending on the size and shape when they are stacked. For example, normally, if the area of the upper and lower surfaces of the intermediate product is large, it can be considered stable. The transport schedule revision unit 31a of the present embodiment takes this into consideration.

  Table 6 shows an example of the stability index in the case of lower stacking. In this table, only the stability of intermediate products d and e for forward conveyance that may be the target of lower loading is shown, but the same is set for intermediate products a, b, and c that are normally conveyed. It goes without saying that it may be. The larger the index, the higher the stability, that is, it is suitable for loading below the other products.

  FIG. 7 and FIG. 8 are diagrams for explaining a method of creating a transfer schedule of the intermediate product 2 by the creation device 11a. FIG. 7 shows a case where the stability index of Table 6 is set for the intermediate product d, and FIG. 8 shows a case where the stability index of Table 6 is set for the intermediate product e. The production plan of step 2 shown in FIGS. 7A and 8A is in the order of the intermediate products a, b, c, d, e from the first day, as in FIG. 3A. Accordingly, in the normal transportation plan shown in FIGS. 7B and 8B, these FIGS. 7A and 8A are also shifted by one day (early as in FIG. 3B). I) things. However, the number of intermediate products a, b, c, d, and e produced from the first day is 14, 12, 7, 6, 3 in FIG. 8, 14 and 10 in FIG. , 9, 6 and 3.

  Here, when the stability index shown in Table 6 is set for the intermediate product e, as shown in FIG. 7C, the transport schedule revision unit 31a is configured to transport two intermediate products b. On the second day, when the intermediate product e is moved forward, the intermediate products e3 and e2 having a relatively large stability index are incorporated, and the intermediate product e1 having a relatively small stability index is It is incorporated into the conveyance of the intermediate product c and the intermediate product d. As a result, the loading situation in the yard of step 2 is as shown in FIG.

  Similarly, when the stability index shown in Table 6 is set for the intermediate product d, as shown in FIG. 8C, the transport schedule revision unit 31a is configured to transport four intermediate products b. On the second day, when the intermediate products d and e are transported forward, all the intermediate products e to be used later are first incorporated. The intermediate products d1 to d5 having the largest intermediate product d6 and the smaller stability index are included in the conveyance of the intermediate product c on the third day. As a result, the loading situation in the yard of step 2 is as shown in FIG.

  FIG. 9 is a flowchart for explaining the operation of the transport lot creation apparatus 11a configured as described above. Processes similar to those shown in FIG. 5 are denoted by the same step numbers and description thereof is omitted. That is, before revision of the transportation schedule in step S9a, a stability index is set in the stability index management unit 33 from the human interface (input / output unit) 1 in step S11, and the stability index is stored in step S12. Stored in the unit 34. In step S9a, the transport schedule revision unit 31a refers to the stability index in addition to the preceding scheduled processing date when performing forward transport.

  The stability index may be used not only for the forward conveyance but also for normal conveyance so that the loading in the yard after the conveyance reflects the stability index. For example, an intermediate product with an earlier unloading order from the carriage may have a larger stability index.

  With this configuration, the intermediate products a, b, c, d, and e are stacked (vertically) in the yard while taking into account the requirements for loading that are permitted for each of the intermediate products a, b, c, d, and e. And use space of the yard can be reduced. Further, 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 Information processing device 13 Human interface (input / output unit)
21 Production Schedule Record Management Unit 22 Production Schedule Date Storage Unit 23 Scheduled Transport Date Derivation Unit 24 Scheduled Transport Date Storage Unit 25 Transport Capacity Upper Limit Management Unit 26 Transport Capacity Upper Limit Storage Unit 27 Transport Capacity Surplus Derivation Unit 28 Transport Capacity Surplus Storage Unit 29 Transport Management unit record management unit 30 Transport management unit storage unit 31 Transport schedule revision unit 32 Transport determination date storage unit

Claims (5)

In a transport plan creation device that transports multiple types of raw materials or intermediate products from the previous process to the subsequent process in a predetermined period between the previous and subsequent processes, the process of the subsequent process is performed at a predetermined cycle, When the raw material or intermediate product is changed every predetermined period,
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;
From the transfer capacity of the transfer facility and the temporary transfer schedule, transfer capacity determination means for determining the margin of transfer capacity in each period,
From the determination result of the transfer capability and the transfer capability of the transfer facility, it is determined whether or not the raw materials or intermediate products that are scheduled to be transferred in a period in which the transfer capability is sufficient can be merged. If there are multiple, the final processing period is determined from the previous raw material or intermediate product, by assigning it to the later part of the transport margin, thereby determining the transport amount by type of the raw material or intermediate product and the period to be transported A transportation plan creation device comprising transportation schedule revision means for creating a transportation schedule. At least a part of the plurality of types of raw materials or intermediate products includes a thing that can be stacked, and further comprises a stability index setting means that can set an index that indicates the stability when the stack is stacked.
The transport schedule revision means refers to the stability index when there are a plurality of materials that can be stacked in the raw materials or intermediate products scheduled to be transported in the same period, and determines the transport order from the highest stability. 2. The transportation plan creation apparatus according to claim 1, wherein the final transportation schedule is created by assigning the first transportation schedule. In a method for creating a transportation plan in which a plurality of types of raw materials or intermediate products are transported from a previous process to a subsequent process in a predetermined period between the preceding and subsequent processes, the processes in the subsequent processes are performed at a predetermined cycle, When the raw material or intermediate product is changed every predetermined period,
Setting a production schedule in each period within the cycle in the post process;
From the production schedule, creating a provisional conveyance schedule of the raw materials or intermediate products required for each period;
A step of determining a margin of transport capacity in each period from the transport capacity of the transport facility and the provisional transport schedule;
From the determination result of the transfer capability and the transfer capability of the transfer facility, it is determined whether or not the raw materials or intermediate products that are scheduled to be transferred in a period in which the transfer capability is sufficient can be merged. If there are multiple, the final processing period is determined from the previous raw material or intermediate product, by assigning it to the later part of the transport margin, thereby determining the transport amount by type of the raw material or intermediate product and the period to be transported And a step of creating a transportation schedule of the present invention. At least a part of the plurality of types of raw materials or intermediate products may be able to be stacked, and further includes a step of setting an index indicating the stability when the stacking is performed.
In the preparation step of the final transportation schedule, when there are a plurality of materials that can be stacked in the raw materials or intermediate products scheduled to be transported in the same period, the stability index is referred to, and the stability index is 4. A method for creating a transportation plan according to claim 3, wherein the transportation order is assigned in the order from the highest one.   5. A transportation plan creation program that causes a computer to execute each step in the transportation plan creation method according to claim 3 or 4.

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