JPH04342195A - Forming apparatus for identification marking part of printed wiring board and displaying method for individual identification information of printed wiring board - Google Patents

Abstract

PURPOSE:To display, without increase of cost, various pieces of manufacturing information of a printed wiring board such as manufacturing year and manufacturing factory, etc., on a printed wiring board without using a barcode and individually control the printed wiring board depending on this display. CONSTITUTION:A market 8 is formed by arranging marking segments 10 for displaying binary-coded information to identify individual printed wiring board 30 input from an input device as many as the number of all pieces of identification information to be displayed and by holding these segments so that each segment can be moved forward and backward and a marking segment drive means, which is provided opposed individually with the marking segment 10 of the marking part 8 and fixes such opposed marking segment 10 after it is moved, is provided. Moreover, a control means for controlling this marking segment drive means is composed of a code converter for converting the identification information of a printed wiring board 30 into a code information and a transmitter for transmitting a code information together with a clock signal and thereby the identification information is stored within the marking segment 10 to form marking part 8.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention provides identification information for identifying a printed wiring board built into an electronic device, etc., on which a large number of electronic components such as IC chips and transistors are mounted, based on manufacturing information. The present invention relates to a device for forming a stamp section for displaying this identification data on a printed wiring board, and a display method for displaying this identification information on a printed wiring board.

0002

[Prior Art] Conventionally, printed wiring boards have not been specifically identified, and therefore not managed systematically.In recent years, manufacturing factories have been using this method to improve productivity. There is an increasing need for management. Under these circumstances, recently printed wiring boards have been updated with various manufacturing information such as lot numbers, manufacturing plants, etc.
We perform consistent management based on manufacturing quantity, shipping destination, manufacturing year/week, etc., and manage not only the production process of printed wiring boards at manufacturing plants, but also the production processes of other products related to the printed wiring boards. There is a movement to accommodate integrated production at factories. As a means of achieving management,
In recent years, there has been a movement to use barcodes as a system that is commonly used and can be easily managed. In other words, barcode data is created by entering various information necessary for managing printed wiring boards from a computer, and a barcode label is created by printing this data on a blank barcode-specific label using a printer. do. This is pasted on any position on the printed wiring board to identify each printed wiring board. The barcode data written on this barcode label is
Each printed wiring board is read and recognized by a dedicated reader, and based on this recognized data, each printed wiring board is individually identified, and managed based on this individual identification information.

0003

However, when attempting to perform management using the above-mentioned barcodes, several problems may occur as shown below. First, the barcode label to be attached to the printed wiring board is
Due to its large dimensions of 6 mm in length and 50 mm in width, it has become difficult to secure space for attaching barcode labels to modern printed wiring boards, which are increasingly packed with high density. There is. In addition, it is difficult to secure space for attaching barcode labels to existing printed wiring boards that have already been manufactured, so it is only applicable to a small number of printed wiring boards that are manufactured with sufficient space. unable to
It is not possible to use it with most existing printed wiring boards.

[0004] Furthermore, even when creating a newly designed printed wiring board, securing a space for pasting a barcode label is important because it makes it easier to arrange the parts and improve the performance of the parts themselves. This creates a problem in that the work at the time of design becomes complicated. Furthermore, even if space is available to affix a barcode label and a barcode label containing information can be affixed, this barcode data cannot be read without a dedicated reader. Because of this, it is necessary to install a dedicated reading device to manage printed wiring boards, which causes new problems such as increased costs and increased operational steps.

[0005] Therefore, the following two inventions of the present application have been made to solve the above-mentioned problems, and can be applied to high-density printed wiring boards and existing printed wiring boards without using bar codes. It can also be used for newly designed printed wiring boards without putting any burden on the design process.
An object of the present invention is to provide a display device for identifying a printed wiring board, which can display various information related to manufacturing the printed wiring board on the printed wiring board, and can easily manage the information on the printed wiring board without increasing costs. This is the purpose.

[0006]

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention converts the individual identification information of a printed wiring board into a binary code so that the user can visually recognize the identification information. The code is displayed at a predetermined position on the printed wiring board. In other words, the first invention is for identification of a printed wiring board, which forms a marking part for displaying individual identification information such as manufacturing year and manufacturing factory on the printed wiring board. In the marking section forming device, the marking pieces that display the information for identifying the individual printed wiring board in binary code are arranged in the same number as the total number of identification information to be displayed and can be individually moved back and forth. A stamping section is formed by holding the stamping section, and a stamping strip drive means is arranged to face each of the stamping strips of the stamping section, and for moving the opposing stamping strips individually and fixing them at the position by a fixing means. and a code conversion section that converts the individual identification information of the printed wiring board into code information, and transmits the identification information converted into the code information together with a clock signal. The transmitter is configured by a transmitter and a transmitter. Then, based on the identification information of the printed wiring board inputted from the input device, the individual identification information is held in the stamping section by operating the stamping piece with a signal created through the code conversion section and the transmission section. And so.

[0007] Next, in a second invention, in the printed wiring board identification method for identifying an individual by displaying arbitrary various information such as the year of manufacture and the manufacturing factory on the surface of the printed wiring board, the printed wiring board is A plurality of through-holes are formed in the board, and a binary code indicating whether the through-holes are to be buried or not buried by the embedding means is used.
Individual identification information is displayed on the surface of the printed wiring board using information converted into a hexadecimal code.

[0008]

[Operation] With the above-described configuration, in the first invention, when the identification information of the printed wiring board to be displayed is inputted from the input device, it is first converted into a binary code by the code converter and then transmitted along with the clock signal. When the serial signal is transmitted from the unit, it is converted into a parallel signal by the serial-parallel converter, and based on this parallel signal, the driver unit switches the switch circuit to switch the current supply from the two power supplies. , a current is supplied from either one of the power sources to driving means for the stamp pieces of the stamp section and the stamp pieces that are individually arranged to face each other.

[0009] The driving means moves the stamp pieces individually back and forth using the supplied current from either one, and further fixes each stamp piece at the position where it has moved back and forth, thereby producing a stamp carrying identification information. part is formed. When the stamp part thus formed is pressed against the edge part of the printed wiring board, the individual identification information is stamped and displayed on the edge part of the printed wiring board by the stamp piece fixed at the position moved forward, Therefore, by measuring the stamped length with a ruler and comparing it with the code table, the identification information can be read visually without using any special equipment. There is no need to reserve space for this.

[0010] Next, in the second invention, first, when it is desired to display identification information on a printed wiring board, it is necessary to secure a predetermined space for displaying the identification information. Note that this space varies depending on the amount of information you want to display, so please reserve a space in advance as an unused part of the printed wiring board to display the information you want to display.
Form as many through holes as the number of pieces of identification information you want to display in this space. Then, this through hole is buried only in necessary locations using a burying means. This depends on whether the through hole is buried or not.
Convert into hexadecimal code. As a result, the user can visually check the information, and by comparing it with the code table, the user can easily recognize characters, numbers, etc. from the binary code information, and as in the first invention above, the user can easily recognize the binary code information by comparing it with the code table. It is possible to identify the identification information of a printed wiring board without using a special reading device.

[0011]

[Examples] Below, the first invention of the present invention, an apparatus for forming an identification marking part for a printed wiring board, and the second invention, a method for identifying a printed wiring board, will be described with reference to drawings. This will be explained using a table. First, let's talk about the identification marking part forming device for printed wiring boards.
This will be explained using FIGS. 1 to 10 and Table 1. FIG. 1 is a schematic configuration diagram of an identification seal forming device, in which (A) shows the connection environment configuration with external equipment, and (B) shows the internal configuration of the device. In addition, Table 1 shows that 160 characters such as letters and numbers are divided into 8
ASCII (ASCII-I) code expressed in bit structure
I) Code table.

[0012] Generally, a printed wiring board is made of a thin plate material having insulation properties, and its thickness is 0.8
The standard value is approximately 2.4 mm to 2.4 mm. Therefore, in this application, an ASCII code having an 8-bit configuration shown in Table 1 below is used as an identification display means to enable individual identification of the printed wiring board at the edge portion of this thickness.

[0013]

[Table 1]

[0014] This Table 1 is called the ASCII (ASCII-II) code table, and is a code of 160 numbers, symbols, and specified characters (uppercase and lowercase letters of the alphabet, katakana, etc.) in an 8-bit configuration. It is expressed as a computer code and is commonly used as code information for computers.

Next, the external connection environment and internal configuration of the identification seal forming device according to the present embodiment shown in FIG. 1 will be explained. In FIG. 1, 1 is a workstation (hereinafter referred to as WS) that serves as an input means for inputting individual identification information of a printed wiring board, and 2 is an identification device that can be interfaced with this WS 1 via an RS232C cable, etc. This printing device 2 is a stamping section forming device (hereinafter referred to as a printing device), and this printing device 2 includes an adapter 3 for interface connection with the WS 1, and a main body 4 for forming a stamping section for displaying individual identification information. , and a power supply section 5 for supplying power to the main body 4.

[0016] Further, to explain the internal configuration of this printing apparatus 2 in detail with reference to FIG. As shown in the explanatory diagram of FIG. 2 showing identification information converted to 8-bit code data, it is output together with clock data. 6 is
A serial-to-parallel converter (hereinafter referred to as S-
7 is a driver unit that outputs the parallel signal converted by the S-P converter 6 to the main body 4, and controls each component for making the stamping unit hold information. It constitutes a control means. The main body 4 is equipped with a marking section 8 as a display means capable of holding identification information in order to display identification on the edge of the printed wiring board. It is equipped with various components for holding identification information.

[0017] In the above configuration, operating WS1,
When the identification information of the printed wiring board to be identified is input, this information is input to the adapter 3 of the printing device 2 through an interface connection. Adapter 3 that received the information
converts this to an 8-bit ASCII code,
It is output as a code signal to the stamp section 8 via the driver section 7 at the same time as a clock signal synchronized with the code signal. Based on this signal, the marking part 8 is formed into a shape capable of displaying the information by a marking part forming mechanism section to be described later, and the marking part 8 formed in a shape capable of displaying this information is removed from the printing device 2 and printed wiring. Printed wiring boards are individually identified by marking the edge of the board.

FIG. 3 is an explanatory diagram showing an example of the individual identification information to be displayed on the printed wiring board. Here, for example, "the last two digits of the year of production"
, "manufacturing week", "factory", "lot number", "product number", and "user number" are displayed, and a total of 18 characters are displayed. All of this information is expressed in numbers or uppercase letters of the alphabet, and when this is expressed as an 8-bit ASCII code, it becomes 8 bits x 18 characters = 144 bits, and is expressed as shown at the bottom of the figure. be done. Thus ASCI
The information converted into the I code is sent to the main body 4, and the stamp section 8 stores this information.

Next, the structure and operation for storing the individual identification information converted into the ASCII code and sent in the stamp section 8 will be explained with reference to FIG. 4. FIG. 4 shows the details of the S-P conversion section 6 and driver section 7 inside the printing device 2. SR1 to SR18 are shift registers with an 8-bit configuration, and 1-bit DI data is transferred in synchronization with a clock signal. It is configured to input one bit at a time, and shift upward by one bit each time. In this way, if you shift one bit at a time and get D8 → D7... → D1,
The output of the data of D1 is the data of D1 located above it.
Similarly, the data is output to 0 and input to DI of shift register SRn located above.
It is held in all shift registers SR1 to SR18 (hereinafter, when all registers are referred to collectively, the symbol is SRn).

DR1 to DR18 are drivers, which are connected to the shift registers SR1 to SR18 in a one-to-one relationship, and receive signals serially output from all the shift registers SR1 to SR18 and convert them into parallel signals. It is something to do. Therefore, 14 shown in FIG.
The 4-bit identification information is simultaneously converted into a parallel signal in the drivers DR1 to DR18, and this parallel signal is output to a plurality of switch groups shown below.

SW1 to SW144 are the driver DR1.
~ 8 switch circuits connected to each of the DR18 (hereinafter, when all drivers are collectively referred to as DRn), one for each parallel signal output from each driver DRn. As shown in the figure, the driver DR1 includes switch circuits SW1 to SW1.
SW8 is connected to the driver DR2, and switch circuits SW9 to S are connected to the driver DR2.
W16 is connected to the switch circuit SW17 to driver DR3.
The SW24 is connected as follows. Each of these SW1 to SW144 (hereinafter, when all the switch circuits are collectively referred to, the symbol is SWn), each of the coils CO1 to 144 (hereinafter, when all the coils are collectively referred to, the symbol is COn) is It is connected.

Each of the switch circuits SWn has a structure as shown in the internal structure diagram of the switch circuit SWn in FIG. 5, and when the driver signal shown in FIG. No current flows through the circuit SWn and it is connected to the NC side, and when the signal is "0", a current flows through SWn and it is connected to the NO side. These switch circuits S
For Wn, the common (C) is connected to the coil COn, the normally closed (NC) is connected to the power supply 1, and the normally open (N0) is connected to the power supply 2.

Next, the structure of the marking section and the DC power supply section will be explained using FIGS. 6 and 7. FIG. 6 is an external view of the stamping section, and FIG. 7 is an enlarged view of the main parts of the stamping section and the DC power supply section. First, the structure of the marking part will be explained with reference to FIG. 6. The marking part 8 has an elongated rectangular box shape, and is provided with a groove 9 in one longitudinal side for inserting a printed wiring board. In order to display identification information of the printed wiring board, 144 stamp pieces 10, which is the number of bits necessary to express the information, are arranged in a line on the abutting surface of this groove 9. The stamping piece 10 is supported so that its tip can protrude and retract into the groove 9, and based on the information input from the WS 1, the corresponding part is held at a protruding position or at a basic position. It has become.

Further, reference numeral 11 denotes a 3P and 160P connector provided on the other side, which is the back side of the surface with this groove 9, and is designed to be connected to the DC power supply 5 of the printing device 2. The structure allows for That is, the stamping section 8 is electrically connected to the printing device 2 via the connector 11 and is also mechanically attached, and when the necessary identification information is transmitted to the stamping section 8 and retained, the connector 11
It can be removed from the printing device 2 by removing the .

Next, the connection structure between the DC power source 5 and each stamp piece 10 of the stamp section 8 will be explained with reference to FIG. In FIG. 7, the tip 10a of the stamping part 8 that is about to protrude from the groove 9 is made of a rectangular sponge material with a width of 1 mm and a length of about 5 mm. , is provided with an ink replenishing section 10b that replenishes ink to be supplied to the tip. 10 more
c is the main body of the stamping piece 10, and the total length of the stamping piece 10 including the main body 10c and the tip 10a is approximately 20 mm, and is movable in a width of 1 mm in the front-rear direction. It has become. As shown in FIG. 7, the upper surface of the main body 10c of the stamping piece 10 has two slits 12 and 13 at a predetermined interval, for example, 1 mm, and engages with a stopper to be described later. to support the stamp piece 10 in a predetermined position.

Further, magnets A14 are provided on the rear end surfaces of the stamping pieces 10, respectively, and when the stamping pieces 10 are not protruding, that is, in the basic position, the magnets A
14 so that the printing device 2 is in a suction position facing the
144 electromagnets B15 are provided at predetermined positions inside, corresponding to all 144 stamp pieces 10. and,
Each of the electromagnets B15 is individually supported from the back side by a coil COn, and the coil COn is connected to the power supply 1 and the power supply 2, and the switch circuit SWn, respectively, as shown in FIG. It constitutes a part of the stamping piece driving means for driving the piece 10.

Reference numeral 16 denotes a stopper for holding the sealing piece 10 at a predetermined position, that is, the protruding position or the basic position, and the same number of stoppers are provided corresponding to each sealing piece 10. As seen in FIG. 7, this stopper 16 has a structure in which one end is used as a fulcrum and the other end is rotatable, and is urged by a spring 17 in a direction to engage with the stamp piece 10. The other end of the stopper 16 has a protrusion 18 that enters and locks into the slits 12 and 13 of the stamping piece 10, and a magnet C19 is attached to the top side in the figure. Electromagnets D20 each corresponding to the magnet C19 are arranged at predetermined positions in the printing device 2 facing the magnet C19.
20 is connected to the power sources 1 and 2 in the same way as the coil COn, and the stopper 16 rotates upward against the biasing force of the spring 17 due to the magnetic force generated by the flow of current from these power sources. It is attracted to the magnet C19.

Next, the operation of the stamp section 8 and the power supply section 5 having the above-described structure will be explained by adding the diagram of FIG. 8 showing the operation of setting the identification information of the stamp piece to FIGS. 4 to 7. The power is turned on to the device, identification information is input from WS1 shown in FIG.
When this information is converted into 8-bit ASCII code information, and this serial code information is further converted into a parallel signal and output from the driver DRn to the switch circuit SWn, each coil CON is powered by the switch circuit SWn. Current flows from power source 1 or power source 2. At the same time, current also flows through the electromagnet D20, and the magnetic force generated in the electromagnet D20 attracts the magnet C19 of the stopper 16, which is placed opposite to it, causing the stopper 16 to rotate about one end of the stopper 16 as a fulcrum. Pull up the end.

On the other hand, each coil CONn is also connected to a power source 1.
Alternatively, current flows from power source 2, but these coils CO
Current flows from the power source 1 to the coil CONn corresponding to the coil CONn through which the current flows to the power source 1 in the switch circuit SWn based on the input information. In this way, the coil COn through which current flows from the power source 1 generates a magnetic field of "N" in the electromagnet B15 supported by the coil COn. Assuming that the side of the magnet 14 provided on the stamping piece 10 side facing the electromagnet B15 has a magnetic field of "N" as shown in FIG. 7, the two magnets A14 and The electromagnet B15 repels each other, and the stamp piece 10 is moved away from the electromagnet B15, moves to the left in the figure, and protrudes in the direction of the groove 9 of the stamp section 8.

On the other hand, in the switch circuit SWn, the power supply 2
A current flows from the power supply 2 to the coil CONn corresponding to the coil CON through which the current flows, and a magnetic field of "S" is generated in the electromagnet B15. Similarly to the above, when the magnet 14 facing this electromagnet B15 has an "N" magnetic field, these two magnets A14 and electromagnet B15 are attracted to each other, and the stamping piece 10 is returned to the basic position. It stays and does not move. In the above explanation, when current is applied to each coil CON from power supply 1 or power supply 2, switching between power supply 1 and power supply 2 is performed based on the identification information input from WS1, as described above. However, the relationship between this information and each stamp piece 10 is such that, for example, as shown in the top view of the stamp section in FIG.
According to the 8-bit information when converted to code, “0
'' corresponds to a basic position that does not protrude due to magnetic attraction, and ``1'' corresponds to a protruding position that is moved away due to magnetic repulsion.

[0031] When the information is transmitted to all the stamp pieces 10 in this way, the state as shown in FIG. 8 is reached. As a result, the stamp section 8 retains the identification state input from the WS1. When the power to the printing device 2 is turned off in this state, the magnetic fields of the electromagnet B15 and the electromagnet D20 disappear. Therefore, the magnet C19, which had been attracted to the stopper 16 by the magnetic force of the electromagnet D20, is released from the electromagnet D20, and the stopper 16, which had been rotating upward, is moved by the spring 1.
It is pulled down by the biasing force 7, that is, in the direction of the stamping piece 10. Along with this, the protruding piece 18 on the other end side of the stopper 16 is placed in the slit 12 or 13 of the stamping piece 10, that is, in the case of the stamping piece 10 in the basic position, the slit 12
In the case of the stamp pieces 10 existing in the protruding position, the stamp pieces 10 enter the slits 13 and are locked with each stamp piece 10 at that position.

FIG. 9 is an explanatory diagram showing this operating state.
If the identification information is "1" at the top, the identification information is "1" at the bottom.
0'' is shown. As seen in this figure, in the initial state, each stopper 16 locks the corresponding stamp piece 10 in a predetermined position. In this state,
When the power is turned on, the stopper 16 is rotated upward by the magnetic force of the electromagnet D20 and released from the slit 12 or 13. After that, when the identification information is input from the WS1, the position of each stamp piece 10 in the stamp section 8 is determined, and the power is cut off, the stopper 16 is moved to the electromagnet D.
It is released from the magnetic force of 20 and rotates downward in the opposite direction to the above. By this operation, the protruding piece 18 at the tip of the stopper 16 enters each slit 12 or 13, and each sealing piece 10 is locked at the set position. As a result, the stamp piece 10 is securely fixed at a predetermined position, and the individual identification information of the printed wiring board is retained in the stamp section 8.

Next, the operation of displaying the above identification information on the printed wiring board will be explained with reference to FIG. Once the identification information is stored in the stamping section 8 as described above, the operator removes the stamping section 8 from the detachably attached printing device 2 by a predetermined operation as shown in (A). As mentioned above, the removed marking section 8 has the structure shown in FIG. Next, the edge portion of the printed wiring board is inserted into the groove 9 of the stamped portion 8, and the stamped portion 8 is pressed against the printed wiring board as shown in (C). In this groove 9, the tips of several stamp pieces 10, which are locked at protruding positions based on the identification information input from the WS 1, protrude as shown in the plan view of FIG. The tip end 10a of each of these stamp pieces 10 is connected to the ink replenishing part 10.
Since the sponge material is impregnated with the ink from step (b), this ink is transferred to the edge portion of the printed wiring board.

Thereafter, when the marking section 8 is separated from the printed wiring board as shown in (D), the identification information of the printed wiring board by the marking section 8 is displayed on the edge of the printed wiring board. This state is shown in the side view of the printed wiring board in which identification information is displayed in FIG. 11. As seen in this figure, there is a tip 10a at the edge of the printed wiring board.
With 144 stamp pieces 10a each having a width of 1 mm,
Information on the length of 144 mm will be displayed. Therefore, by measuring the length with a ruler, anyone can freely read the individual identification information of the printed wiring board at any time without special equipment using a pre-formed code table. can.

Next, a printed wiring board identification display method for individually identifying printed wiring boards, which is the second invention, will be explained using FIGS. 12 to 14 and Table 2. In addition, in the present display method described below, the space for displaying identification information on each printed wiring board needs to be as large as the space for pasting a conventional barcode label. We will only deal with labels for which this space can be secured, but the difference from barcode labels is that they do not require a dedicated reading device to read the displayed data.

FIG. 12 is an explanatory diagram showing an individual identification display method for a printed wiring board, FIG. 13 is a plan view of the main part of the printed wiring board, and FIG. 14 is an enlarged explanatory diagram of the main part showing the structure of the through hole. Table 2 is a 6-bit code table for displaying identification information of a printed wiring board. First, a 6-bit code table will be explained using Table 2.

[0037]

[Table 2]

As shown in Table 2, numbers, several types of specific symbols, and letters (only uppercase letters of the alphabet) are encoded and expressed using the 6-bit configuration, resulting in 26 = 64 ways of expression. is possible. In other words, the 6-bit code that can be expressed in 64 ways is used to display some information that is desired to be displayed as identification information in an unused space on the printed wiring board.

FIG. 12 shows an example of information to be displayed as identification information, and as in the first embodiment described above, for example, "the last two digits of the year of production",
A case is shown where "manufacturing week", "manufacturing plant", "lot number", "product number", and "user number" are displayed, and are displayed using 18 characters in total. All of this information is expressed in numbers or uppercase letters of the alphabet, and when this is represented by a 6-bit binary code, it becomes 6 bits x 18 characters = 108 bits. This is 10
FIGS. 12 and 13 show a state in which eight through holes are used to indicate whether the through holes are buried using solder or other embedding means or not.

In the figure, 30 is a printed wiring board, 31
is a through hole formed at a predetermined position of this printed wiring board 30, and by providing a land 32 on its circumferential surface, good solderability is achieved when solder is used as the embedding means. This through hole (VIA) 31 has a hole diameter of 1.0 mm and a land diameter of 1.3 mm, and has one character inserted about 5 mm inside from the side edge 30a of the printed wiring board 30. Six bits of information for expressing, that is, six through holes 31 are arranged in a row in the vertical direction at equal pitches. Furthermore, in order to express all 18 characters of identification information, these six through holes 31 are arranged in 18 rows in the horizontal direction, also at equal pitches. As a result, the 18 characters of information you want to display can be displayed through the through holes 31, 6 vertically and 18 horizontally, for a total of 108.
It becomes possible to express it in .

Then, the arrangement of the through holes 31 is changed to 1.
Assuming that the pitch of 6 characters (vertical) is 1.905 mm, and the pitch of 18 horizontal rows (18 characters) is 2.54 mm, the area required to express 108 characters is vertical = 1.
．． 905 x (6-1) = 9.525mm, width = 2.
54×(18-1)=43.18mm, or about 10
It can be displayed in a space of mm x 50 mm. Therefore, when displaying this identification information on the printed wiring board 30, it is first necessary to secure a space having the above-mentioned size on the printed wiring board 30. thus,
A method of expressing information by forming all 108 through holes 31 at a predetermined pitch and at a predetermined position will be described with reference to FIG. 12.

FIG. 12A shows a state in which all 108 through holes 31 are formed at a predetermined pitch. When the printed wiring board 30 in this state is placed in a solder bath (not shown) in conjunction with the work of soldering the mounted components, all 108 through holes 31 are filled with solder, as shown in FIG. Thereafter, when the solder in this through hole 31 is extracted according to the 6-bit code and returned to the original hole, characters indicating identification information can be expressed. When the solder is removed from the predetermined positions of all 18 rows of through-holes 13 in this way, the above-mentioned identification information consisting of 18 characters, ie, manufacturing year, manufacturing week, manufacturing structure,
The lot number, product number and user number will be represented. This state is shown in the same figure (C).

[0043] Then, by comparing this information with the 6-bit code table, similar to the first invention described above,
Anyone can freely read it at any time without using any special equipment. Note that the process of removing the solder from the through hole 31 can be performed without any technical problem, and the 18 characters used to express the identification information are not limited to 18 characters, and space can be secured. If so, said information can be increased;
It is also possible to manage these by expressing the history of modification of the printed wiring board 30, the version number of the board, etc.

[0044] Further, although solder is used as a means for filling the through-hole in the above-described embodiment, it is of course possible to use other means as long as the through-hole can be filled. In addition, when filling through holes with this solder, in the procedure described above, all the through holes were once immersed in a solder layer to fill them all and remove the solder in the necessary places, but the solder process Before performing this process, it is also possible to apply tape or the like to mask the predetermined through-holes so that the solder does not get into them, so that only the necessary through-holes are filled with solder.

[0045]

As explained above, according to the present invention, first of all, as a first invention, a stamp piece that displays information for identifying an individual printed wiring board in binary code can be Forming a stamping part which is arranged in the same number as the number of pieces of identification information and held individually so as to be movable back and forth,
It has a stamping piece drive means that is arranged to face each of the stamping pieces of the stamping part, moves the opposing stamping pieces individually and fixes them at that position by a fixing means, and controls this stamping piece driving means. The control means includes a code conversion unit that converts individual identification information of the printed wiring board into code information;
and a transmitter that transmits the identification information converted into code information together with a clock signal, the code information is created through the code converter and the transmitter based on the identification information of the printed wiring board input from the input device. By moving the stamp piece in response to a signal, the individual identification information is held in the stamp section.

Therefore, by pressing this marking part against the edge of the printed wiring board, the identification information can be easily displayed on the printed wiring board, which eliminates the need for pasting barcode labels as in the past. The same amount of identification information, or even more, can be easily displayed on a printed wiring board without having to occupy a large space. In addition, this identification information can be obtained freely by anyone at any time without using a dedicated reading device by measuring the length of the stamped part with a ruler and comparing it with a pre-formed binary code table. Can be read. As a result, there is no need to install a dedicated reading device, so there is no increase in costs, and there is no need to reserve space on the printed wiring board surface for displaying identification information, allowing for high-density mounting. It can also be used with printed wiring boards that already have components mounted on them. Furthermore, even if a printed wiring board is newly designed, there is no need to secure a space for information display at the time of design, so the design work becomes easy.

Next, in the second invention, in the printed wiring board identification method for identifying an individual by displaying arbitrary information such as the year of manufacture and the manufacturing factory on the surface of the printed wiring board, the printed wiring board A plurality of through-holes are formed in the board, and a binary code indicating whether the through-holes are to be buried or not buried by the embedding means is used.
Individual identification information is displayed on the printed wiring board using decimal coded information.

[0048] Thus, in the second invention, it is necessary to secure a space for displaying identification information that is approximately the same as the space for pasting the barcode label described in the prior art; Since it is sufficient to form a through hole in the printed wiring board and fill it with embedding means, there is no need for a device for converting identification information into barcode information, and the cost required for information management can also be reduced. Further, according to the above-mentioned method, by visually checking the condition of the through hole, that is, whether it is buried by a burying means or not, and by comparing this with a binary code table prepared in advance, Unlike barcode information, it can be read freely by anyone at any time without using a dedicated device, and costs can be reduced by reducing the number of reading devices.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of an identification seal part forming device;
A) shows the connection environment configuration with external equipment, and (B) shows the internal configuration of the device.

FIG. 2 is an explanatory diagram showing identification information of a printed wiring board converted into 8-bit code data together with a clock signal.

FIG. 3 is an explanatory diagram showing an example of individual identification information to be displayed on a printed wiring board.

FIG. 4 is an explanatory diagram showing details of an S-P conversion section and a driver section in the printing apparatus.

FIG. 5 is an internal structural diagram of a switch circuit.

FIG. 6 is an external view of the stamp section.

FIG. 7 is an enlarged view of the main parts of the stamp section and the DC power supply section.

FIG. 8 is an explanatory diagram showing an operation for setting identification information on a stamp piece.

FIG. 9 is an explanatory diagram showing the operating state of the stopper.

FIG. 10 is an explanatory diagram of an operation for displaying identification information on a printed wiring board.

FIG. 11 is a side view of the printed wiring board showing identification information displayed.

FIG. 12 is an explanatory diagram showing a method for displaying individual identification of a printed wiring board.

FIG. 13 is a plan view of essential parts of the printed wiring board.

FIG. 14 is an enlarged explanatory diagram of a main part showing the structure of a through hole.

[Explanation of symbols]

2 Printing device 3 Adapter 4 Main body 5 Power supply section 6 S-P conversion section 7 Driver section 8 Stamp section 9 groove 10 Stamp piece 10a Tip 14 Magnet A 15 Electromagnet B 16 Stopper 30 Printed wiring board 31 Through hole 32 Land

Claims (2)

[Claims] Claim 1: An apparatus for forming an identification marking part of a printed wiring board, which forms a marking part for displaying individual identification information on the printed wiring board for identifying the individual printed wiring board, such as year of manufacture and manufacturing factory. , in which stamp strips displaying binary coded information for identifying the individual printed wiring boards are arranged in a number equal to the total number of identification information to be displayed and are individually held so as to be movable back and forth. forming a stamping part, having a stamping piece driving means disposed individually facing the stamping pieces of the stamping part, moving the opposing stamping pieces individually and fixing them at that position by a fixing means; The control means for controlling the one-side drive means is constituted by a code conversion section that converts individual identification information of the printed wiring board into code information, and a transmission section that sends the identification information converted into code information together with a clock signal. Based on the identification information of the printed wiring board inputted from the input device, the individual identification information is held in the stamping section by operating the stamping piece with a signal created through the code conversion section and the transmission section. A device for forming an identification marking portion of a printed wiring board. 2. A printed wiring board identification method for identifying an individual by displaying arbitrary information such as year of manufacture and manufacturing factory on the surface of the printed wiring board, wherein a plurality of through holes are formed in the printed wiring board. The through-hole is formed, and whether the through-hole is buried by a burying means or not is encoded in binary code, and the individual identification information is displayed on the surface of the printed wiring board based on the binary coded information. Identification method for printed wiring boards.