JPH0719704Y2 - Production control device for production line - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a production management device for a production line, which is applied to an automated production line such as a copying machine, and is used by a repairer when a defective product is taken out from the production line. The present invention relates to an apparatus capable of outputting a message display or the like indicating the content of a defect and totalizing the actual number of products in each process by excluding the returned products that have been repaired and returned to the production line again.

<Prior Art> In an automated production line, a product is mounted on a pallet, the pallet is moved, and each process is sequentially performed on the product.

And, in order to detect defective products,
Measures were taken to track and store the results of each inspection of products flowing on a free-flow base machine in computer software.

In addition, when totaling the number of actual products for each process, in the conventional case, the returned products taken out from the production line as defective products and repaired are also counted.

<Problems to be solved by the invention> According to the production control device of the conventional production line, since the software for tracking and storing the inspection result is uncertain,
In addition to the problem that the reliability is poor, the returned products are also counted as the actual results, which causes the inconvenience that the actual process quantity exceeds the planned production quantity.

<Means for Solving Problems> The present invention is to mount a product on a pallet equipped with a magnetic plate for storing inspection results and process numbers, and move the pallet to perform a plurality of processes for the product. In a production line that sequentially executes, inspection means for inspecting whether or not a product mounted on the pallet and moving on the production line is defective, and an inspection result of the inspection means is written on the magnetic plate. Inspection result writing means, judging means for judging whether or not the product is defective according to the inspection result information written on the magnetic plate, and for the product judged to be defective by the judging means. Output means for outputting the content of the defect, and a takeout tool for taking out from the production line a product which is located in the vicinity of the output means and which is judged to be defective by the judging means. A step, a return unit located at the rear of the extraction unit, for returning the repaired product taken out from the production line by the extraction unit in the downstream process to the production line, and located at the rear of the return unit, the magnetic plate And a determining unit that determines that the product is a product returned to the production line again when the read process number is equal to or larger than the process number being executed. Except for products that are determined to have returned to the production line again, a process number writing means for writing the process number of the executed process on the magnetic plate, and a position located behind the process number writing means. And a totalizing means for totaling the actual number of products by process, excluding the product which is judged to be the product returned to the production line again by the judging means. Is provided for each process, and is a production management device for a production line.

<Operation> With this configuration, after each step is performed, the product is inspected, the inspection result of the inspection means is stored in the storage means, the defective product is taken out based on the inspection result, and this is taken out. Repair the product and return it to the production line again. After that, the process number of the executed process is written in the storage means, and based on this process number, it is determined whether or not the product has returned to the production line again, and the product returned to the production line is excluded. The actual number of products produced by each process is totaled.

<Embodiment> Hereinafter, the configuration of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing a pallet moving on a production line and a product (semi-finished product) mounted (placed) on the pallet.

In the figure, 1 is a pallet on which a product 2 is mounted, and a plurality of pallets 1 on which the product 2 is mounted are moved on the production line.

A plurality of processes are performed on the product 2 in the production line.

Then, an n-bit magnetic plate 3 was attached to the pallet 1. In this embodiment, the magnetic plate 3 having 9 bits assigned to the quality information and 3 bits assigned to the process information is provided.

A production line (not shown) is provided with a writing / reading device 4 for reading information stored in the magnetic plate 3 or writing predetermined information on the magnetic plate 3.

FIG. 2 shows an automated production line of a copying machine to which the present invention is applied, in which the (N-1) th step, the Nth step and the 1st (N + 1) step are carried out.

The magnetic system symbols used in the figures have the following meanings.

■: Elimination of quality information, writing of process number, and process record counting. However, in the case of products returned from the downstream process, the process number is not written or counted.

In the figure, 5 is a CRT display device, and the CRT display device 5
Is an apparatus for displaying the NG message (contents of NG) based on the information of the NG product stored in the magnetic plate 3. Further, the solid line L indicates the route through which the product determined to be an NG product as a result of the inspection is removed from the production line. A broken line M indicates a return path in which the repaired return product is returned to the production line after being removed from the production line because it is an NG product.

In the figure, 6 is an inspection station.

The production management device of the production line of this embodiment executes the following processing for the inspection result information and the process information.

Inspection result information a) Write inspection result NG information at each inspection station.

b) In the case of severe NG products, it is impossible to repair them and return them to the production line again, so pass the downstream inspection station (the inspection station on the downstream side of the flow of the current inspection station) and Treated as defective in the process.

c) NG items are automatically taken out to the repair zone.

d) Display the NG message on the CRT to the repairer.

 Process information a) Write the process number at each process boundary.

b) The actual process count is not performed for products returned from the downstream side.

The flow of writing and reading of magnetic information in each station is shown in FIGS. 3 to 5.

Flow of FIG. 3; this flow shows each inspection station, and is the magnetic system symbol described above. Corresponding to.

After the pallet arrives in step S1, the inspection result information is read (step S2).

Next, it is judged whether or not it is severe NG (S3 step), and when it is judged as severe NG, the process jumps to step S8, and the pallet payout process is performed in step S8.

On the other hand, if it is determined in step S3 that it is not severe NG, the process proceeds to step S4 to start the inspection.

Then, the inspection result is written in step S5.

At this time, the bit corresponding to the inspection item is written.

Subsequently, in step S6, the inspection result is read,
Thereafter, the inspection result is collated in step S7.

S7 step, based on the collation of the inspection results, the S5
It is determined whether to return to the step or to proceed to the step S8.

Flow of FIG. 4; this flow shows the flow of NG product removal processing, and is the magnetic system symbol described above. After the pallet arrives at the T1 step (off take-off determination station) corresponding to, proceed to the T2 step to read the inspection result information.

Then, in step T3, it is determined whether or not the product is NG, and when it is determined that the product is not NG, the process proceeds to step T6 to advance the OK product straight.

On the other hand, if it is determined that the product is NG in the T3 step, the NG content is displayed as a CRT message (T4 step), and then the NG product is taken out to the repair zone (T5 step).

The flow of FIG. 5; this flow shows each process boundary and corresponds to the magnetic system symbol (1) described above.

First, when the pallet arrives in the U1 step, the inspection result information is erased (U2 step).

Then, in order to confirm the erasing process in the U2 step,
Go to the U3 step to confirm the existence of the inspection result information,
Next, in step U4, it is determined whether the inspection result information exists.

As a result of the determination, if the inspection result information does not exist, that is, if the inspection result information can be erased, the process proceeds to step U5 below, but if the inspection result information cannot be erased, the process returns to step U2.

In step U5, the process number written after the erasing process of the inspection result information is read, and in the next step U6, it is determined whether or not the product is a returned product. At this time, it is checked whether or not the read number ≧ N (the number of steps) is satisfied.

If the read number ≧ N (the number of processes) in step U6, the read number is greater than the number of processes if the product is a return product, so it is determined that the product is a return product.
Proceed to step 1 and pay out the pallets.

On the other hand, if the reading number <N at step U6, it is determined that the product is not a return product, and the process proceeds to step U7.
The process number N is written in the U7 step, the process number N is read in the subsequent U8 step, and then the process number N is collated in the U9 step.

If the collation result of the U9 step is obtained, the process proceeds to the U10 step, where the actual number of machines is counted (totalized).
This count is made by the higher-level production management system.
The totalized result is displayed externally, and the current actual number of process records is grasped.

As described above, the production management device of the production line of the present invention writes the inspection result (NG) information at each inspection station to the n-bit magnetic plate attached to each product pallet in the production automation line, and stores the information. Read
NG items will be automatically taken out to the repair zone and the NG message will be displayed on the CRT to the repair person.

On the other hand, at each process boundary, the actual number of products processed in the process is counted.

However, it is conceivable that the NG repaired product taken out from the downstream process may be re-flowed from the upstream side (return product), and if this returned product is also counted, there is the inconvenience that the actual process quantity exceeds the planned production quantity. We used information to prevent double counting of returned products. That is, the process number (process step information) written at each process boundary is read to determine whether or not the product is a return product.

<Effect> As described above, according to the production control apparatus for the production line of the present invention, the following effects can be obtained.

That is, regarding the inspection result information, (a) improvement of reliability: that is, by storing each inspection result of the product flowing in the free-flow base machine in the magnetic plane of the pallet instead of tracking and storing it by computer software, it is uncertain. The tracking software could be reduced and the reliability could be guaranteed.

(B) Improvement of work efficiency: That is, each inspection result NG product is automatically taken out to the repair zone, and the repairer can understand it.
NG contents are automatically displayed on the CRT.

Further, regarding the step progress information, (a) accurate management of the number of units: that is, the true number of the actual numbers of each process with respect to the planned production number can be grasped.

(B) Cost reduction: That is, the number of data memories and computer jobs can be reduced as compared with serial number verification.

[Brief description of drawings]

FIG. 1 is a diagram showing a pallet loaded with products, FIG. 2 is a configuration diagram of a production management device of a production line according to an embodiment of the present invention, and FIGS. 3 to 5 are flow charts for writing / reading information. FIG. FIG. 6 is a diagram showing a processing flow of the present invention. 1 ... Pallet, 2 ... Product, 3 ... Magnetic plate, 4
...... Write / read device, 5 ... CRT display device, 6 ... inspection station.

Claims (2)

[Scope of utility model registration request] 1. A production line in which a product is mounted on a pallet equipped with a magnetic plate for storing inspection results and process numbers, and a plurality of processes are sequentially performed on the product by moving the pallet, Inspection means for inspecting whether a product mounted on a pallet and moving on the production line is defective, an inspection result writing means for writing an inspection result of the inspection means on the magnetic plate, Judging means for judging whether or not the product is defective according to the inspection result information written on the plate, and outputting means for outputting the contents of defect of the product judged to be defective by the judging means, A pick-up unit located near the output unit for picking up a product judged to be defective by the judgment unit from the production line, and a pick-up unit at the rear of the pick-up unit. Then, the return means for returning the repaired product taken out from the production line to the production line by the take-out means for the downstream process and the step number stored at the rear of the return means and read and read in the magnetic plate When the given process number is the same as or larger than the process number being executed, it is a determination unit that determines that the product is a product that has returned to the production line again, and a product that has returned to the production line again by the determination unit. Except for products that have been discriminated as the above, the process number writing means for writing the process number of the performed step on the magnetic plate and the step number writing means, which is located at the rear part of the step number writing means, are again produced by the discriminating means. Except for products that have been determined to be products that have returned to the above process, a totaling means for totaling the actual number of products by process is provided for each process. Production control apparatus of the production line to be. 2. The production management device for a production line according to claim 1, wherein the output means comprises a CRT display device.