JP3151908B2 - Transport assignment indicator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a production management technique for a production system in which parts produced in a certain process are transported to a subsequent process, and in the subsequent process, production activities are redeployed using the parts transported. It is about. In particular, the present invention relates to an apparatus that can manage transportation more rationally.

[0002]

2. Description of the Related Art As a technique for managing transportation in accordance with post-production activities, a method called a kanban method is well known. This is introduced, for example, in the November 1987 issue of Operations Research, page 730-. To summarize this technology, it can be said that transportation is rationally managed in a post-replenishment manner. That is, in this technique, an identification card called a kanban is attached to a part to be conveyed. In the subsequent process, each time the part is used, the kanban is separated from the part, and the separated kanban is returned to a predetermined position. The returned kanban serves as a transportation ordering instruction to the transportation staff. Therefore, every time the kanban is returned, transportation is performed. This circulation conveys and replenishes parts that have only been used in the subsequent process.

[0003]

This kanban system is a well-conceived production management technique that does not cause excessive inventory or shortage, but has the following problems. FIG. 2 is a diagram schematically showing a conventional transport management technique. As is clear from this figure, in order to manage the parts as intended, the person in charge of transportation A must constantly monitor the returned kanban B or the empty trolley C. If this is overlooked, kanbans and empty trolleys accumulate in the post-process, causing shortage in the post-process. Even if it is not overlooked for such a long time, the trolley will be ubiquitous, and the transportation must be repeated at a rapid pitch in order to properly recover the trolley.

[0004] Usually, the transporter is in charge of transporting between many processes not shown in FIG. Therefore, it is easy to overlook that kanbans or empty carts have accumulated. In particular, when the production pace in the post-process changes suddenly, the recovery of the kanban and the empty carts also changes suddenly, so that the work of the transporter A is extremely difficult to schedule. Therefore, work efficiency is not good. Also, once the trolley starts to be ubiquitous between certain processes, it will affect the transportation between other processes while coping with it. Therefore, the present invention is to develop a device capable of displaying the scheduled transportation time in advance so that transportation management can be performed more rationally.

[0005]

Therefore, in the present invention, as shown in FIG. 1, the concept of the present invention is a number which is planned to be used in a post-process within a predetermined period, that is, the post-process plan use. Means 2 for calculating the number, means 4 for accumulating the number of transported from the own process within the period preceding the predetermined period and not used in the subsequent process for each period, and calculating the excessive transport at the start of the predetermined period, Means 6 for subtracting the calculated excess transport number from the calculated post-process planned use number to calculate the number required to be transported within the predetermined period, that is, the planned transport number, and transporting the calculated planned transport number. Means 8 for calculating the number of planned transports by dividing by the number of units, means 10 for calculating the time of the planned transport by allocating the calculated planned number of transports within the predetermined period It created a transport assignment instruction device, characterized in that it comprises a means 12 for displaying the calculated planned delivery time.

[0006]

According to the transportation assignment instructing device, first, the number used in the post-process is calculated from the number planned to be produced in the post-process. A certain number, the planned number of transports, is calculated. Next, the number of times of actual transportation, that is, the number of planned transportations, is calculated from the planned number of transportations.
When the planned number of times of transportation is calculated, it is determined how to allocate the transportation during the period in which the production plan of the subsequent process is given, and the time at which transportation is required, that is, the planned transportation time is calculated. You. The calculated planned transportation time is displayed on the display means. The transporter can then know when the transport will be needed.

[0007] For this reason, the person in charge of transportation can anticipate the transportation time in advance, and can adjust his / her own schedule to improve work efficiency. In addition, it is possible to prevent the kanban or the empty cart from being overlooked until it is accumulated, and it becomes easy to carry out the transportation work smoothly.

[0008]

FIG. 3 shows a system configuration of an apparatus 24 embodying a transportation assignment instruction apparatus according to the present invention. This device is configured to be able to create a production plan for its own process from the production plan given to the subsequent process, for example, a work-in-progress plan and an inventory plan for its own process. To be displayed on the display 32.

The apparatus 24 is connected online to a related apparatus A for managing a post-process, and a production plan for the post-process is input from the related apparatus A. Also, it is connected online to a related device B for managing a pre-process for supplying parts to the own process, and can output the own process plan created by the device 24 to the related device B.

The device 24 is constituted by a computer system having an arithmetic processing unit 36 as a core, and includes an input device 34 and an output device 38 for transmitting and receiving data to and from the related devices A and B.

The device 24 has tables 40 to 48 for storing various information. The process / configuration table 40 stores, for example, the relationship between the products to be produced in the subsequent processes, the types of components required for the production of the products and supplied from the own process, and the number of components required for each product. The delivery form table 42 stores the number of parts per carriage, that is, the number of transport units, and the like. Further, the work mode table 44 stores data and the like regarding the operation timetable of the post-process and the own process. Further, in the excessive transport table 48, the excessive transport calculated as described later is updated and stored.

In addition, the device 24 includes a keyboard 2
6. Peripheral devices such as a floppy disk device 28, a printer 30, and a display 32 are connected. In the case of this device 24, the display means of the present invention is constituted by the display 32.

FIG. 4 illustrates the contents of processing performed by the present apparatus. The work schedule table 44 stores an operation timetable illustrated in FIG. 4A. That is, on November 26, the day shift from 8:00 am to 17:00 (12
A break between 13:00 and 1 hour overtime from 18:00 to 18:00 is planned, and a night shift from 21:00 pm to 6:00 the next day (however, a break from 12:00 to 2:00 am and 6:00 to 7:00) One hour of overtime work is planned) and 11
The case where the same operation timetable is planned on the 27th of the month is illustrated. The columns of b and c in FIG. 4 show the planned post-process production numbers. In the illustrated case, 116 A, 58 B, and 27 November 38 A and 20 B from 8:00 am to 14:00 (Period II), and A during the remaining time on November 27 (Period III)
Are produced, and a plan to produce 19 B and 68 B is given.

When the planned post-process production number is input, the process / configuration table 40 is referred to, and the components used in the post-process to satisfy the plan of the subsequent process and the number thereof are calculated. In the case of FIG. 4, the simplest case in which the product A requires one a component and the product B requires one b component, and in this case, 116 a components are provided within the period I. , B is 5
Eight, 38 a and 20 b in period II, and 19 a and 68 b in period III. This is the post-process planned use number.

When the number used in the subsequent process is calculated in this way, the excess stored in the excess transport table 48 is called, and this is subtracted from the number used in the subsequent process. The subtraction value is used as the planned transport number. The majority is calculated as described below, but in the case of FIG.
At the start of the period I, the case where the excess transport is zero for both a and b is illustrated. If the majority is zero, the planned number of transports in the column e is naturally equal to the number of uses in the column c. Therefore, in the case of FIG. 4, the planned transport number of transporting a total of 174 pieces is obtained.

When the planned number of transports is calculated, the number of units transported at one time is called by referring to the delivery form table 42. Then, the arithmetic processing unit 36 calculates the planned number of times of transportation by dividing the planned number of transportations by the number of transportation units and obtaining the smallest integer exceeding the division value. In the case of FIG. 4, since [174/30] = 6 (here, []
Indicates the smallest integer greater than the divide value), illustrating that six deliveries are planned during period I.

On the other hand, the details of transporting a total of 30 a and b at a time are calculated. Here, 30 pieces are proportionally distributed by multiplying 30 pieces by the ratio of the planned number of conveyances shown in the column e. The column of f of FIG. 4 shows this, and in this case, it is illustrated that transporting 20 a and 10 b at a time can satisfy the plan.

When the number of times of transportation and the number transported by one transportation are calculated in this way, the total number transported within the period is obtained. On the other hand, since the number of uses during the period has already been obtained, this difference, that is, the excessive transport during the period, is calculated. This is shown in h, which illustrates that during period I four extra a's and two extra b's are carried.

When the excess transport during this period is accumulated, the excess transport at the end of the period, that is, at the start of the next period is calculated. At the beginning of period I, the overhaul is zero, and during period I there are four overhauls for a,
Since there are two for b, as shown in column d, the number of transports at the start of period II is four for a, and
Are two. This is the table 48
Is stored. Similarly, for period II, the excess is subtracted from the number of uses during the period to calculate the planned number of transports, which is divided by the number of transport units to calculate the number of planned transports. It is calculated and this is accumulated to calculate the overload at the end of period II (at the beginning of period III).

When the planned number of times of transportation for each period is calculated in this way, a transportation time is allocated next. Here, it is planned to be delivered at regular intervals every period. As a result, during period I (18 hours of operation), six transportations
Assigned to time intervals, during period II (5 hours of operation), two deliveries are assigned at intervals of 2 hours 30 minutes, period II
In I (13 hours of operation), three transfers are allocated at intervals of 4 hours and 20 minutes. As a result, the planned transportation time shown in FIG. 4i is calculated. The calculated planned transportation time is displayed on the display 32 and instructed by the transportation staff.

As a result, the person in charge of transportation can know the planned transportation time, and can easily set his own work schedule. That is, it is not necessary to constantly monitor the collection state of kanbans or empty carts as in the past, and the collection state and the like need only be confirmed before and after the planned transportation time.

Here, the planned production number of the post-process is given for each predetermined period in which the production pace is substantially uniform. In the case of November 27, the production pace changes suddenly at 14:00 pm, so
Given in III. However, even when the production pace is uniform over several days, the planned production number is given on a daily basis. That is, the planned production number is given on a daily basis or in each of the shorter ones of the periods in which the production pace is almost uniform. As described above, the planned production number of the subsequent process
Is input to the arithmetic processing unit 36 via the input unit 34.

In the above-described embodiment, the case where one component is transported from the own process per product in the subsequent process has been described. However, the relationship between the numbers may be arbitrary. Also, the case where two types of a and b are mixed and transported is illustrated,
One or three or more types may be transported.

In this embodiment, the post-process plan use number calculating means, the excess transport count calculating means, the planned transport count calculating means, the planned transport count calculating means, the planned transport time calculating means, etc. are mainly composed of the arithmetic processing unit 36. It is built on a computer system. This computer system does not require any special restrictions, and may be a general computer system.

[0025]

According to the present invention, the transportation time necessary to satisfy the production in the subsequent process is calculated in advance from the usage plan of the subsequent process, displayed, and notified to the transport staff, so that the transportation staff can be notified. The person in charge can easily adjust the schedule in advance, and can easily maintain the progress status of transportation.

[Brief description of the drawings]

FIG. 1 is a diagram schematically showing the concept of the present invention.

FIG. 2 is a diagram showing a conventional problem.

FIG. 3 is a system diagram of an embodiment.

FIG. 4 is a diagram illustrating processing contents of the present invention.

[Explanation of symbols]

 2 Post-process planned usage number calculation means 4 Transportation excess count calculation means 6 Planned transportation number calculation means 8 Planned transportation frequency calculation means 10 Planned transportation time calculation means 12 Display means

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-3-142667 (JP, A) JP-A-2-292603 (JP, A) JP-A-2-131829 (JP, A) JP-A-3-142 105457 (JP, A) JP-A-5-189446 (JP, A) JP-A-5-89154 (JP, A) JP-A-5-108684 (JP, A) (58) Fields investigated (Int. ⁷ , DB name) G05B 19/418 B23Q 41/08 G06F 17/60

Claims (1)

(57) [Claims] 1. A means for calculating a number planned to be used in a post-process within a predetermined period, that is, a planned post-process use number, which is transported from its own process and used in a post-process within a period prior to the predetermined period. Means for accumulating the unexecuted number for each period to calculate the excess transportation at the start of the predetermined period, and subtracting the calculated excess transportation from the calculated post-process planned use number to transport the transportation within the predetermined period. Means for calculating the number of transports that need to be performed, that is, the number of planned transports; means for calculating the number of planned transports by dividing the calculated planned transport number by the number of transport units; Means for calculating the time of the planned transportation by allocating within the predetermined period; means for displaying the calculated planned transportation time; a transportation allocation instruction apparatus, characterized in that: