JPS60213443A - Production indicating device - Google Patents

Abstract

PURPOSE:To make the next assembling parts information indicatable in synchronous with assembling operations, by indicating the assembling parts to a work to be conveyed on an assembling line only when the indicated parts accord with the actually selected parts. CONSTITUTION:When a work Wi is situated in a position where a bar code 5 is read on the basis of a position signal out of a work detecting sensor 3, it is read by a bar code reading device 7 whereby a specification information process for assembling parts to be indicated by the reading signal takes place, and memory information to be housed in a pointer congruous with the value of an indicating pointer IP is read out, and the indicating signal is outputted to an indicating device 11, thus assembling parts are informable to an operator. Next, on the basis of each work completion signal out of photoelectric sensors 13A-13C, with a code of the assembling parts read out according to the pointer IP and a judgment that the completion signal is outputted out of which sensor among three photoelectric sensors, when the indicated parts and the actually selected parts are not yet congruous, a buzzer 19 is sounded and programming stops.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a production instruction device suitable for use on a parts assembly line. This invention relates to a production instruction device that can instruct parts to be assembled during assembly.

[Background of the invention]

Recently, with the aim of making efficient use of assembly lines, a production system has been implemented in which various types of workpieces are transported on the same assembly line and different parts are assembled onto each workpiece. In such a production system, if the worker judges the workpieces that are sequentially conveyed on the assembly line and selects the parts to be assembled accordingly, it is possible to assemble one assembly instead of using a scale that increases the burden on the worker. Since there is a risk that mistakes may occur, the type of work being transported is identified by an identification device, and the worker is instructed which parts to assemble by means such as a rung or voice.

However, in this type of production system, instructions for sequentially assembling parts are given as the belt conveyor moves, and the actual work situation is not taken into account at all. Therefore, if the work is delayed for some reason, the timing of the actual work and the update of the instructions will be different, and the next instruction will be output even though the work is not completed, and the worker will not necessarily be given accurate information.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a production instruction device which synchronizes the assembly of parts to a workpiece with the work and instructs information regarding the next part to be assembled.

[Structure of the invention]

The present invention is designed to instruct the next part to be assembled on a workpiece transported on an assembly line only when the instructed part and the actually selected part match. It is designed to indicate parts.

〔Example〕

FIG. 1 shows a schematic configuration of an embodiment of the apparatus of the present invention, in which various types of workpieces wt% W2, W3, W4, w5. w6 is being conveyed on the belt conveyor 1 in the direction of arrow A. The belt conveyor 1 is divided into areas WAI to WA6 for each workpiece, and a workpiece detection sensor 5 is disposed to output a position signal when the rear end of each workpiece area reaches its first position P1. There is. This workpiece detection sensor 3 is, for example,
Can be configured with a limit switch and photoelectric sensor.

On the other hand, in this embodiment, each workpiece W1 is attached with a barcode 5 indicating information regarding the specifications of the assembly parts to be assembled to each workpiece. In response, the barcode is read by a barcode reading device 7, and the reading device 7 outputs a reading signal corresponding to the barcode 5. An indicating device 11 is provided for indicating the parts to be used.
For example, it can be configured with a rung lighting device and an audio output device.

Further, the work place 9 is provided with work detection devices 15A, 15B, and 15G as shown in FIG. Referring to FIG. 2, the assembly parts storage shelves 12A, 12B, and 12GK in which different assembly parts A and B%C are respectively stored are provided with photoelectric sensors 15A, 115B, and 15G, respectively, to signal work completion. It is designed to output .

The work detection sensor 5, the barcode reading device 7, the instruction device 11, and the work detection device 15 are connected to the control circuit 1, respectively.
7 is connected. Further, the buzzer 19 is also controlled by the control circuit 17.
It is connected to the. Here, the control circuit 17 can be constituted by a well-known microprocessor, and controls various devices according to the calculation procedure shown in FIG.

When the program shown in FIG. 3 is started, in step SI, the flag FLG 2 is set to zero, and the conveyor pointer CP and work pointer WP are set to zero. Here, the conveyor pointer CP detects a position signal every time the rear end of each work area WAI to WA6 divided at equal intervals on the belt conveyor 1 reaches a first predetermined position P1. It is incremented by 1 each time it is output from. Still, the work pointer wp is incremented by 1 each time the worker blocks the optical path 15 of the photoelectric sensor of one of the component storage shelves 12A to 12G υ and the work completion signal is output. .

In step S2, based on the position signal from the workpiece detection sensor 5, it is determined whether the workpiece W1 is located at a position where the barcode 5 attached to the workpiece W1 can be read.

That is, in this example, when the rear end of the workpiece areas WAI to WA6 is detected by the workpiece detection sensor 3, the barcode reading device 7 can face and read the barcode 5 of the workpiece W1. Therefore, the barcode 5 can be read when the position signal is generated.

If an affirmative determination is made in step S2, the process proceeds to step S3, where the bar code reading device 7 reads the bar code 5 and obtains the read signal. Then, the process proceeds to step s4, where the specification information of the assembled parts indicated by the obtained read signal is processed. That is,
Deciphers specification information, for example codes A and C of assembled parts,
The information is sequentially stored in a predetermined area of a storage device in the control circuit 17, for example, a stack memory. Which pointer information from the stack memory is retrieved is controlled by an instruction pointer IP, which will be described later.

Proceeding to step S5, the conveyor pointer CP is incremented by one. Then, in step s6, the instruction pointer IP is set to zero. Next, the process proceeds to step 87, and the instruction calculation process shown in FIG. 4 is executed.

Referring to Figure 4, when this program is started,
In step B41, it is determined whether the conveyor pointer CP is greater than or equal to the number NWA of work areas WA between the first position P1 along the belt conveyor 1 and the second position P2 of the work area 9. If a negative determination is made, in step 842, the value of the conveyor pointer CP is set as the value of the work pointer wp, and the process proceeds to step 845. On the other hand, if an affirmative determination is made in step 841, the process proceeds to step 843, where it is determined whether the flag ]l'1JG2 is 1 or not. When a negative determination is made, the hand NA 344 sets the flag 1PLG 2K 1, and the work pointer W P I
Configure the ICN WA and proceed to step 845. Further, if a negative determination is made in step 843, the process directly proceeds to step 845.

In step 845, the pointing pointer P is calculated according to the following equation (1).

IP=NWA+CP-WP (1) Then, in step P46, the information in the memory stored in the pointer that matches the value of the instruction pointer xP determined by the above formula is read, and the The instruction signal is output to the instruction device 11.

Accordingly, the instruction device 11 can notify the operator that the part to be assembled is either A or C, for example.

When step j1 shown in FIG. 4 is completed, the program returns to the program shown in FIG. 3 and executes step S8.

In step S8, it is determined based on the work completion signals from the photoelectric sensors 13A to 13C whether or not the assembled parts have been taken out by the worker, in other words, whether the work has been completed. In this embodiment, the work is defined as completed when the assembled parts are taken out from the storage shelf. Next, in step S9, the code related to the assembled part read out according to the instruction pointer P set as described above, and the judgment as to which sensor among the three photoelectric sensors is outputting the work completion signal. In other words, the control circuit 170 determines whether or not the work indicated by the instruction device 11 has been performed, depending on which of the five photoelectric sensor input ports the work completion signal is input to. That is, it is determined whether the designated part and the actually selected part match.

If an affirmative determination is made in step S9, the work pointer WP is incremented by 1 in step Sxo, and the process proceeds to step 811. Further, if a negative determination is made, the buzzer 19 is sounded in the hand MAS te. Then, when the program advances to step sii, the buzzer 19 is stopped.

When the process proceeds to step 812 following step 811, the work progress calculation process shown in FIG. 5 is executed.

Referring to Figure 5, when this program is started,
If the work progress is determined in step s61, it is assumed that there is no delay, and a delay occurrence flag F L is set in step 862.
G l is set to zero, and when an affirmative determination is made, it is assumed that there is a delay, and in step 863, a delay occurrence flag FLG is set.
Set 11C1.

ζHere, the above formula is a formula that defines the allowable range of delay, and in this embodiment, the number of barcodes 5 read is
The work is considered to be delayed when the number of completed workpieces is greater than FJ2.

When the procedure shown in FIG. 5 is completed, the program returns to the program shown in FIG. 5 and executes the procedure 813.

In step E113, it is determined whether a delay has occurred in the work based on the delay flag FLG1. Flag FL
If G1 is 1, an affirmative determination is made and the process proceeds to step S15, where the belt conveyor 1 is stopped. If the judgment is negative, proceed to step 81
4, if the belt conveyor 1 is stopped, the belt conveyor 1 is started.

Next, the designated pointer P set by hand 1 [s41 to s845 in FIG. 4 and the information storage position of the attached part in the storage device will be explained with reference to FIG. 6. Note that in the apparatus shown in FIG. 1, the workpieces W6 to W1
passes through the first position P1 in sequence, the workpiece W6 is the part, W5 is the B part, W4 is the C part, W3 is the part, W2 is the B part, and WIK is the part C part 4M. Assume that the information is written in parcode 5. Further, there is a work area WA between the first position P1 and the second position P2.
Therefore, it is assumed that 5 is set for 1iWA of 11 types.

When the rear end of the work area WA6 passes the first position P1, the conveyor pointer cp becomes 1, and the attached part number A as specification information of the work W6 is stored in the pointer 1 of the storage device. At this time, a negative determination is made in step S41 in FIG. 4, and 1 is set in the work pointer WP in step 842. However, in hand Jl 184s, (engine P = 5 + 1
-1=5) is calculated. storage device 4 interface 5
Since nothing is currently stored in , no meaningful information is output to the indicating device 11 (FIG. 6 AI).

In the next step A, the conveyor pointer cp and work pointer WP advance in the same way, and when the conveyor pointer CP reaches 5,
The process proceeds to step 845 via steps 841, 843 and B44, and 5 is set in the instruction 4 interface IP. Information regarding the attached parts is stored in the storage device while being shifted sequentially according to the progress of the conveyor pointer cp, so that the pointer 5 of the storage device stores the specification information A about the workpiece W6, and the pointer 4 stores the specification information A about the workpiece W6. Specification information B about work W5 is stored in pointer 3, specification information C about work W4 is stored in pointer 2, specification information A about work W3 is stored in pointer 1, and specification information B about work W2 is stored in pointer 1. (Figure 6 A5). Therefore, now
If the instruction pointer IP is 5, the storage device pointer 5
Specification information A is read out, and in step 846, an instruction signal indicating the information is output to the indicating device 11, and information about the attached part A, for example, the letter A, is displayed on the indicating device 11. .

Based on this information, when the operator takes out the attachment part A from the attachment part storage shelf 12, a work completion signal is output from the photoelectric sensor 15A, and the work pointer wp is incremented by 1 in step StO of FIG. , the work pointer WP becomes 6. Therefore, the conveyor pointer cp next increments to 6
Then, the pointing pointer P is given by the above formula (11) and then 5
Then, the information B of the pointer 5 of the storage device is outputted to the pointing device 11 and displayed in the same manner as described above (FIG. 6).

Here, if the work is delayed and the conveyor pointer CP advances to 7 before taking out the attachment part B displayed on the indicating device 11, the work pointer WP remains at 6 (No. Figure 6 A7). Therefore, the pointing pointer P calculated in step 845 of FIG. 4 is (P=5+7-6=6
), and the information in the pointer 6 of the storage device is output to the indicating device 11, but the contents of the storage device are shifted every time the conveyor pointer CP is incremented, so that the latest information is always stored in the pointer 1. Since it is stored in
As the conveyor pointer CP advances, information on the next part B to be attached is shifted from pointer 5 to pointer 6 (FIG. 6, A6→167). Therefore, if the work is delayed, the instruction contents are not updated and are held, so that information on the next part to be taken out can be reliably displayed on the instruction device 11. Note that, as mentioned above, if the CP is delayed by 2 or more, the line is stopped.Next, another example of obtaining a work completion signal will be described.

FIG. 7 shows an example in which the parts to be attached to the workpieces W1 to W3 are once processed using one of the three types of processing machines 21A, 21B, and 21C, and then the processed attachment parts are attached to a predetermined workpiece. .

In this example, a signal indicating that each of the processing machines 2iA, 21B, and 21C is being driven, that is, a work completion signal, is taken into the control circuit 17, and it is determined whether or not the work completion signal is output from which processing machine. It is something to do.

FIG. 8 shows an example in which the mounting positions of the mounting parts on the works W1 to W3 are different from each other. That is,
Three photoelectric sensors consisting of a pair of light-emitting elements 25A and light-receiving elements 25B are arranged at positions corresponding to the mounting positions of each mounting part, and at a predetermined time, the optical path is interrupted from any one of the photoelectric sensors. The control circuit 17 determines whether a signal, that is, a work completion signal is output. Therefore, if a work completion signal is output from any of the photoelectric sensors, an affirmative determination is made in step S8 of FIG. If the instruction content and the work content determined as described above match, step S9 in FIG. 3 is performed.
Then, the judgment is affirmative.

Although the above explanation deals with a case where a worker attaches a mounting part to a workpiece, the present invention can be similarly applied to a case where a robot attaches a mounting part to a workpiece. The process is the same as described above, except that the robot takes out the designated part to be attached and assembles it to the workpiece in response to the output from the device 11.

According to this embodiment, since work errors can be ascertained, the behavior of the worker can be analyzed using this information, which can contribute to solving problems. In addition, since the actual amount of parts used can be easily determined, parts management can be performed and inventory can be kept to a minimum.

〔Effect of the invention〕

According to the present invention, when instructing parts to be attached to a workpiece being conveyed on a belt conveyor, sequential updating of the instructions is permitted only when the correct part to be attached is selected. Therefore, instructions can be given according to the progress of the work.

In addition, according to the embodiment of the present invention, if you forget to install a part, in other words, if there is a missing part, the line will stop, and if the wrong part is still installed, the buzzer will sound, so you can avoid missing or incorrect parts being installed. This has the effect of being able to discover defective products in that process and immediately taking measures to deal with those defective products before they are sent to the next process.

[Brief explanation of drawings]

Fig. 1 is a schematic configuration diagram of an embodiment of the present invention, Fig. 2 is a perspective view showing nine photoelectric sensors installed on the component storage shelf, and Fig. 3 is an example of a control procedure for the device shown in Fig. 1. FIG. 4 is a flowchart showing an example of the instruction calculation process, FIG. 5 is a flowchart showing an example of the work progress calculation process, FIG. Figure 5 Figure 6 Figure 7 Figure 8

Claims (1)

[Claims] In a production instruction device that reads information about parts to be attached to a transported workpiece and instructs the information, means for determining whether or not the instructed parts match the actually selected parts; 1. A production instruction device comprising means for instructing a part to be assembled next only when it is determined by the means that the parts match.