JPS6140610A - Reading method of production indicating card - Google Patents

Abstract

PURPOSE:To output accurate production indicating information and to prevent the occurrence of errors in the production work by reading information codes on a production indicating card plural times and outputting production indicating information only when all read contents coincide with one another. CONSTITUTION:When a production indicating card 20 is carried in the moving direction of an arrow X, the arrival of the card 20 at a reading position is detected if sensors 38A and 38C are turned on and a sensor 38B is turned off, the reading of information on the card 20 is started. In case of this code reading, the code is read when the light passing front end sides of holes 30 and 32 in accirdance with movement of the card 20 is detected by sensors 38A and 38C, and the code is read again when the light passing rear end sides of holes 30 and 32 is detected by sensors 38A and 38C. That is, the information code on the card 20 is read twice while the light passing holes 30 and 32 are detected by sensors 38A and 38C. If read contents coincide with each other, production indicating information is outputted.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method of reading a production instruction card, and in particular,
The present invention relates to a production instruction code reading method suitable for reading an information code punched into a production instruction card and outputting various production instruction information according to the read contents. [Conventional technology] In production lines such as automobile factories, a wide variety of workpieces are transported on one assembly line, and each workpiece is different. Work is underway to assemble the parts. For this reason, on such a line, there is a risk that mistakes will occur during assembly unless accurate instructions are given to the workers. Therefore, in order to prevent mistakes during assembly, on these production lines, a production instruction card is transported together with the workpiece, the information code punched in the production instruction card is read, and the assembly is performed according to the read contents. A production instruction device is used to specify parts. As a conventional production instruction device, for example, as shown in FIG. 10, a container 3 is installed on the production line in order to read the information code of the production instruction card 1 that is transported along the line with the workpiece. ing. This container 3 houses an optical sensor group,
These sensors can read the information code of the production instruction card 1 passing through the passageway of the container 3. The signals read by the optical sensor group are supplied to the card reading device 5, and the card reading device 5 outputs production instruction information according to the information code punched in the production instruction card 1. As this production instruction information, for example, if it is information for assembling the parts in the parts storage box 7B to the workpiece,
Lamps 9A to 9 attached to parts storage shelves 7A to 7D
Among the lamps D, the lamp 9B designated by the information code of the production instruction card 1 is lit. Therefore, when the workpiece is transported, the operator can assemble the parts in the parts storage box 7B with the lighted lamp 9B on the workpiece, thereby preventing the worker from assembling the wrong part on the workpiece. [Problems to be Solved by the Invention] However, in the apparatus shown in FIG. 10, when the production instruction card 1 passes through the container 3, the sensors 15A, 1
5 (Since the method of reading the information code of the production instruction card 1 once when the sensor 15B becomes OFF due to J"-ON is adopted, it is difficult to accurately read the information code of the production instruction card 1 due to disturbances etc.) The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a method for reading a production instruction card that can accurately read the information code of the production instruction card. Means for Solving the Problem] In order to achieve the above object, the present invention provides a method for moving the production instruction card in which the information code hole group and the positioning hole group are drilled so that the production instruction card is positioned at the information reading position. When the information code of the production instruction card is reached, a device that reads the information code of the production instruction card detects that the production instruction card has reached the information reading position by detecting light passing through each positioning hole,
While the light passing through each positioning hole is detected, the production instruction car 1°0 information °-)o*″′i ″″′”l! ttli@
5? zL゛・61. The production instruction information according to the read information code is output only when the read contents of the first floor are compared and all the read contents of each floor match. [Example] Hereinafter, an example of the present invention will be described in detail based on the drawings. FIG. 1 shows the structure of a production instruction card according to the present invention. In FIG. 1, the production instruction card 20 has a length of 1
It is a resin plate material of 70w x width 120fi x thickness 3m + 11, and has nine information code holes 22a to 22 in the upper row.
i and one parity check hole 24 are drilled in a line as required. Information code hole 22a~
22i is used in the form of a binary coded decimal number, and holes 22f~
22i indicates a lower digit, 22b to 22e indicate a middle digit, and 22a indicates a higher digit, and 4 bits are assigned to each of the lower and middle digits. And the lower and middle digits are θ
~9 can be represented, and nine information code holes 22a
~22i can represent 199 types of information. In the case of FIG. 1, the number 199 is represented by the holes 22a to 22iK. Also, parity check hole 2
4 is provided to maintain the reliability of information. In FIG. 1, holes 22a, 22b, 22e, 22f, 22
The decimal number 199 is represented by drilling 1, and holes 24 are drilled to make the total number of drilled holes an even number. In the middle of the production instruction canister 20, positioning holes 30 and 32 are bored at a predetermined distance from a line connecting the centers of the holes 22a to 22i and the hole 24, and on a line parallel to the line. The width 12 of the holes 30 and 32 is narrower than the width 11 of the holes 22a to 22i. Holes 22a to 221.2 drilled in the production instruction card 20
4,30. A group of optical sensors for detecting light passing through the card 32 are arranged along the conveyance path of the production instruction card 20. That is, the information code reading optical sensor 34A~
34I and an optical sensor 36 for reading a parity check code are arranged corresponding to the array positions of the holes 22a to 22i and 24, respectively. Also, the positioning optical sensors 38A, 38B', and 38C are sensors 34A to 34113.
It is arranged on a line a predetermined distance away from the array line of No. 6. Among the positioning sensors, sensor 38A138C is located in hole 3.
The sensor 3BB is arranged in correspondence with the drilling pitch of 0 and 32, and the sensor 3BB is arranged at an arbitrary position between the sensor 38A and the sensor 38C. And each sensor 34A-34I, 36, 38A. The detection outputs 38B and 38C are supplied to a card reading device 40 shown in FIG. The card reading device 40 includes an input card 42 that constitutes an input interface circuit, a control unit 44 having a CPU, a ROMSRAM, etc., and an output card 46.
An input card 42 is connected to a sensor unit 48 housing a group of optical sensors, and an output card 46 is connected to various output instruction devices. In this embodiment, the output indicating device shown in FIGS. 3 to 5 is used. That is, the information code of the production instruction card 20 is transmitted to the lamp 9 of the parts storage box 7.
A digital display configured to light up any one of the lamps A to 9D, or as shown in FIG. A type in which numbers are displayed on a board, and a type in which the information code of the production instruction card 20 is displayed in a BCD code on display boards 50 and 52 as shown in FIG. 5 are used. Which output instruction device to use among these output instruction devices is selected by setting the input conditions of the card inserted into the input card 42. For example, when the output instruction device shown in FIG. 3 is selected by the card attached to the input card device 42, the production instruction card 20 is conveyed along the production line together with the workpiece, and the sensors 38A and 38C are turned ON. Sensor 38B#X0FF becomes production instruction card 20
When it is detected that the production instruction card 20 is at the information reading position, the information code of the production instruction card 20 is read in the control unit 44 based on the detection outputs of the sensors 34A to 34I, and 36, and the I is read. And sensor 34
The content of the information code read with A~34I is displayed on lamp 9B.
If the information is to light up the lamp 9B, a signal for lighting the lamp 9B is supplied to the lamp circuit of the output instruction device via the output card 46, and the lamp 9B is turned on. [Function] The present embodiment has the above-mentioned configuration, and its function will next be explained based on FIGS. 6 to 9. First, when the information code of the production instruction card 20 is read, it is determined that the production instruction card 20 has reached the information reading position by monitoring the detection outputs of the sensors 38A, 38B, and 38C. That is, when the production instruction card 20 is conveyed along the moving direction X shown in FIG. The detection outputs of 38B and 38C have the waveform shown in FIG. Then, when the sensors 38A and 38C are turned ON and the sensor 38B is turned OFF, the production instruction card 20
It is detected that the information code has reached the information reading position, and reading of the information code of the production instruction card 20 is started. When reading this information code, in this embodiment, the light passing through the front edge side of the holes 30 and 32 as the production instruction card 20 moves is emitted. 38A, (ON) CJ8C (O
(timing t6), the information code is read by the sensors 34A to 34I, 36, and the light passing through the rear edge side of the hole 3.0.32 is detected by the sensor 38A, (OFF) 38C. (OFF), that is, at timing t7, the information code is read by the sensors 34A to 34I and 36. That is, in this embodiment, the information code on the production instruction card 20 is read twice while the light passing through the holes 30, 32 is detected by the sensors 38A, 38C. That is, in step 200, the production instruction card 20 passes through the sensor storage container 3, so that the sensor 38B
It is determined whether or not the switch is turned off. That is, it is determined whether the detection end of the sensor 38B is blocked by the production instruction card 20 or not. When it is determined as YES in this step, □ moves to step 202 and sensor 3
It is determined whether 8C is ON or not. That is, it is determined whether the light passing through Confucius 2 is detected by the sensor 38C. If the determination in this step is NO, the process moves to step 204 and it is determined whether the sensor 38A is ON. That is, in steps 202 and 204, it is determined whether or not the sensor 38C138A is turned on, respectively.
When it is determined that it is YFiS, the process moves to steps 206 and 208, respectively. In step 206, sensor 3
In step 208, it is determined whether the sensor 8A is turned on or not, and whether the sensor 38C is turned on. When it is determined in step 206 or step 208 that it is the Y edition S, both the sensor 38A and the sensor 38C have become KON, and the process moves to step 210. In addition, in the processing of steps 202 to 208, when the production instruction card 20 moves in the direction of the arrow X in FIG.
Processing is performed to detect the state when light passing near the edges of the sensor 38A, 38C is detected. That is,
This process is performed when the moment when the front edge side of the hole 30, 32 faces the detection ends of the sensors 38A, 38C is captured. In step 210, sensors 38A and 38C are
Since the sensor 38B is turned off, it is detected that the production instruction card 20 is at the information reading position, and the sensors 34A to 34H and the sensor 36 read the information code. After this step 21
2, it is again determined whether the sensor 3gB is OFF. If the determination in this step is YES, the process moves to step 214, and it is determined whether or not the sensor 38C is turned off. In other words, sensor 38C that is ON
The detection end determines whether the optical path is blocked by the trailing edge of the hole 32 or not. If the determination in this step is NO, the process proceeds to step 216, where it is determined whether the sensor 38A is turned off. That is, step 214,2
At step 16, it is determined whether or not the deviation '3sA, -t=y38C'1' has become OFF or +. If the determination is YES in step 214, the process moves to step 218, and in step 216, YES is determined.
If it is determined to be ES, the process moves to step 220. Then, in step 218, it is determined whether the sensor 18A is turned off, and in step 220, it is determined whether the sensor 38C is turned off. That is, in steps 214 and 2i8, and in step 216
, 220 odor [sensor 38A and senna 38C are both O]
A determination is made as to whether or not it has become FF. When both the sensor 38A and the sensor 38C are turned OFF', K moves to the process of step 222. And again in step 222, 38 sensors. Processing is performed to read the information code at the moment when both 38C are turned off. That is, following the process of step 210, a second process of reading the information code is performed. After the process of step 222, the process moves to step 224. In step 224, the contents of the first and second readings are compared, and it is determined whether the data read each time match. If the determination in step 224 is NO, the process moves to step 226, where the card reading device 40 outputs a signal for displaying a reading error to the output instruction device. On the other hand, when the determination is YE8 in step 224, the process moves to step 232, and the process of "validity check" is performed. If the determination in this step is No, the process moves to step 234 and the same processing as step 226 is performed. If the determination in step 232 is YES, the process moves to step 236 and converts the BCD data into BIN (binary).
The process of converting it to data is no longer necessary. After this step 23
8, data (
decimal) is performed, and the process moves to step 240. In step 240, it is determined whether each digit of the number is 10 or more. If each digit of the number is 10 or more, K moves to step 242 and performs the same process as step 226.
On the other hand, if the determination in step 240 is No, that is, if there is no reading error, the process moves to step 244. Step 244 and subsequent steps are output mode selection processing. In step 244, it is determined whether the signal is 1 out of N (FIG. 3), which is a signal such as a lamp instruction, and if the determination is No, the process moves to step 246. At step 246, 78EG output (Figure 4)
It is determined whether or not. That is, it is determined whether or not the production instruction information is to be output to the output instruction device shown in FIG. When the determination is No in this step, K goes to step 24.
The process moves to step 8, and data is output by the BCD (FIG. 5). On the other hand, if the determination in step 246 is YES, the process moves to step 250, where the process of converting the decimal code to 7SEG is performed, and the process moves on to step 252. Step 2
At 52, output processing is performed using 78EG data. If the determination in step 244 is YES, the process moves to step 254, where data output processing is performed at 1 out of N, and all processing in this routine is completed. In this way, in this embodiment, when reading the information code of the production instruction card 20, the information code is read at two timings, and it is determined whether or not the data at each timing match. Since the production instruction information according to the read information code is output only when all of the information codes match, accurate production instruction information can be output. Also, in this embodiment, the hole 30
Since the width 12 of ゜32 is narrower than the width 11 of the holes 22a to 22i and 24, regardless of the moving speed of the production instruction card 20,
While the light passing through the holes 30.32 is detected, the information code of the production instruction card 20 can be read. [Effects of the Invention] As explained above, according to the present invention, the arrival of the production instruction card at the information reading position is detected by detecting the light passing through each positioning hole, and! While the light passing through each positioning hole is detected, the information code on the production instruction card is read multiple times, the contents of each reading are compared, and the information is read only when all the contents of each reading match. Since the production instruction information is output according to the code, accurate production instruction information can be output, and an excellent effect can be obtained in that it is possible to prevent errors in the production of hakama.

[Brief explanation of the drawing]

FIG. 1 is a configuration explanatory diagram of a production instruction card according to the present invention, FIG. 2 is a configuration diagram of a card reading device according to the present invention, and FIG.
The figure is a configuration diagram of an output instruction device using a lamp, and Figure 4 is a 7
FIG. 5 is a configuration diagram of an output instruction device using segment display elements, FIG. 5 is a configuration diagram of an output instruction device for displaying a BCD code, FIG. 6 is a waveform diagram for explaining the operation of the device according to the present invention, and FIG. 9 to 9 are flowcharts for explaining the operation of the device related to the present F14VC, and FIG. 10 is a configuration diagram of a conventional production instruction device. 20... Production instruction card, 221-22i... Hole for information code, 24... Hole for parity check,
30.32...Positioning hole, 34A~34I...
・Information code reading sensor, 38A-38C...
-Positioning sensor, 40...Card reading device.

Claims (1)

[Claims] (1) When the production instruction card, in which the information code hole group and the positioning hole group are drilled, moves and the production instruction card reaches the information reading position, the device that reads the information code of the production instruction card The arrival of the instruction card at the information reading position is detected by detecting the light passing through each positioning hole, and the information code on the production instruction card is read multiple times while the light passing through each positioning hole is detected. The method for reading a production instruction card is characterized in that the reading contents of each reading are checked and the production instruction information according to the read information code is outputted only when all the reading contents of each reading match.