JPH0329686B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a logistics management device, which is used for temporarily stocking intermediate products in various production lines, or for stocking finished products awaiting shipment. The present invention relates to a distribution management device suitable for use in inventory management of goods in goods storage areas (hereinafter referred to as warehouses) such as warehouses.

[Conventional technology]

On various production lines that are assembled using a large number of parts, due to differences in work speed between one production process and the next, warehouses are usually set up to temporarily store intermediate products from the previous process. It is being The same applies to finished products.
A warehouse is provided to temporarily store finished products that are being produced one after another while awaiting shipment.

Normally, in these warehouses, inventory management is carried out to balance the number of items that come in and the number of items that go out, and to keep the number of items in stock within a predetermined tolerance according to the storage capacity of the warehouse. Furthermore, in recent years,
Labor-saving efforts are being made to manage these inventories using computers. (Magazine I.E Review Vol. 24 No. 3 published June 16, 1981). In this example, when supplying outsourced products and in-house products to an assembly line, a warehouse called a packet building is set up in between, and a controller called LM-1000 controls the entry and exit of this warehouse. Management is performed by a host computer.

[Problem that the invention seeks to solve]

The above-mentioned inventory management method is based on a distribution pattern in which a certain number of goods are regularly stocked and a certain number of goods are also taken out at regular intervals. Therefore, when managing warehouse inventory, the control standard value (standard storage value) is set to a fixed value depending on the production scale, and if it is within this control standard value, the inventory is appropriate, and if it exceeds this value, the inventory is appropriate. ,
It was deemed inappropriate.

However, the production line that enters the warehouse,
If the production lines that take goods out of the warehouse have different start and end times, there will be periods of time when goods are received but no goods are taken out, and conversely, there are times when there are no goods received but goods are taken out, so it is not always the same. There are cases where it is not appropriate to use management reference values and inventory management during this time period is impossible.

For example, as shown in FIG. 5, only warehousing is performed until the warehousing start time is earlier than the warehousing start time, so the stock amount (or inventory quantity) monotonically increases. In this case, even though production is being performed normally, the inventory value exceeds the upper limit of the inventory management reference value, resulting in an inventory alarm. Further, if the warehousing end time is earlier than the warehousing end time, only the warehousing is performed until the warehousing end time, so the inventory amount monotonically decreases. In this case, even though production is being carried out normally, the lower limit of the inventory management reference value is exceeded and an inventory alarm occurs.

This phenomenon occurs when the receiving production line operates day and night shifts and the issuing production line only operates during the day, or when the issuing production line operates on holidays of the receiving production line. This is more likely to occur when the production line on the receiving side and the production line on the outgoing side are different in production form.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a management device that can manage irregular inventory patterns that occur due to differences in the production formats of the warehousing-side production line and the warehousing-side production line.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention includes: a carry-in state detection means for detecting the state of carry-in of goods into a storage area; a carry-out state detection means for detecting a state of carry-out of goods from the storage place; Based on the detection signals of each of the detection means, if the carry-in start time is earlier than the carry-out start time or if the carry-in end time is later than the carry-in end time, the value increases monotonically, and if the carry-in start time is later than the carry-out start time, or the carry-in A control means for comparing the measured storage value with a reference storage value which monotonically decreases when the end time is earlier than the removal end time and outputting an alarm when the actual storage value deviates from the reference storage value. This is a characteristic feature.

[Effect]

According to the present invention having the above configuration, the reference storage value increases monotonically when the carry-in start time is earlier than the carry-out start time or when the carry-in end time is later than the carry-out end time, and when the carry-in start time is later than the carry-out start time. In addition, if the loading end time is earlier than the unloading end time, the characteristic is monotonically decreasing, so that the standard storage value is adapted to the actual storage format and compared with the measured storage value, thereby determining the suitability of the storage format. can be judged. As a result, it is possible to prevent unnecessary warnings from being issued and causing confusion on the production line.

〔Example〕

Next, embodiments according to the present invention will be described based on the drawings.

FIG. 1 shows an embodiment of a physical distribution management device according to the present invention. In FIG. 1, when an article flows on a carry-in conveyor 1, its type is read by a barcode reader 2, which is a carry-in state detector.
The read signal is sent via the communication line 4 to a computer 8 which is a control device. Similarly, when an article is shipped by truck, its type is read by a barcode reader 6, which is an unloading state detector.
The read signal is sent to the computer 8 via the communication line 4. 5 is a warehouse for storing goods;
Reference numeral 9 denotes a memory for storing scheduled warehousing start time, scheduled warehousing end time, scheduled warehousing start time, scheduled warehousing end time, planned warehousing amount per unit time, planned warehousing amount per unit time, and actual inventory value.

Inventory management by computer 8 is shown in Figures 2 to 4.
This is done using the algorithm shown in the figure. In FIG. 2, when the power is turned on, a routine Sub1 for measuring the actual inventory value is called, and the actual inventory value Cn at the current time is obtained <Step 100>. That is, the routine for measuring the actual inventory value shown in FIG.
When Sub1 is called from the main routine, it is determined whether the data Po from the reader 2 on the warehousing side has arrived <Step 200>, and if so, the inventory counter Cn is incremented <Step 201>. Next, it is determined whether the data _P1 from the reader 6 on the delivery side has arrived <Step 202>. If so, the inventory counter Cn is decremented <Step 203>.
>, return to the main routine with the value of Cn.

Next, the routine Sub that creates the inventory management reference value
2 is called, and the inventory control reference value Cn at the current time is obtained <Step 101>. That is, as shown in FIG. 4, when the routine Snb2 for creating the inventory management reference value Cn is called from the main routine,
Determine when the current time t is within the range from the scheduled warehousing start time To to the planned warehousing end time _T1 .
Step 300>, if it is, the inventory control value Cn
Add the planned stock receipt amount Vin for the unit time to the new inventory control standard value Cm <Step 301
>. Next, it is determined when the current time t is within the range from the scheduled shipping start time T ₂ to the scheduled shipping end time T ₃ <Step 302>. The value obtained by subtracting the planned quantity Vout is updated as a new inventory control reference value Cm <Step 303>, and the process returns to the main routine with this updated value of Cm.

Next, it is determined when the actual inventory value Cn is within ±10% of the reference value Cn <Step 102>. If it is not, an inventory alarm is output <Step 103>.

As mentioned above, if there is a difference in overtime between the production line on the receiving side and the production line on the shipping side, if the production line on the receiving side operates day and night shifts, and the production line on the shipping side only operates during the day shift (or vice versa) ), the receiving production line operates on holidays and the issuing production line does not operate on holidays (or vice versa),
Conventionally, the suitability or unsuitability of the actual inventory value was judged based on a fixed inventory management reference value, but with the present invention, inventory management during this period is also possible, and if the actual inventory value is large, production will be reduced and the actual inventory value will be reduced. If the amount is small, production instructions can be given that are appropriate for the actual situation of increasing production, and incorrect instructions are no longer given as was the case in the past.

〔Effect of the invention〕

According to the present invention, the reference storage value increases monotonically when the carry-in start time is earlier than the carry-out start time or when the carry-in end time is later than the carry-out end time, and when the carry-in start time is later than the carry-out start time or when the carry-in ends. By adopting the characteristic of monotonically decreasing when the time is earlier than the unloading end time, it is possible to adapt the standard storage value to the actual storage form and compare it with the measured storage value, thereby determining the suitability of the storage form. can. As a result, it is possible to prevent unnecessary warnings from being issued and causing confusion on the production line.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is a flowchart showing the main algorithm of control operation, Fig. 3 is a flowchart showing a routine for measuring actual inventory values, and Fig. 4 is an inventory management standard. FIG. 5 is a flowchart showing the value creation routine, and is an explanatory diagram showing changes in inventory amount over time. 1... Carrying-in conveyor, 2... Barcode reader (carrying-in state detector), 4... Communication line, 5... Warehouse, 6... Barcode reader (carrying-out state detector),
7...Truck, 8...Computer (control device), 9...Memory.

Claims (1)

[Claims] 1. Carrying-in state detection means for detecting the state of carrying in goods into the storage area; carrying-out state detecting means for detecting the state of carrying out goods from the storage area; Monotonically increases when the start time is earlier than the unloading start time or when the loading end time is later than the unloading end time, and monotonically increases when the loading start time is later than the unloading start time or when the loading end time is earlier than the unloading end time. A physical distribution management device comprising: a control means that compares a decreasing standard storage value with an actual storage value and outputs an alarm when the actual storage value deviates from the standard storage value.