JPH1076711A - Method and device for marking on product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To readily execute management of defective products by printing a code indicative of content related to a defect on a product. SOLUTION: In a marking device 1 of a product 6, a code corresponding to an inspection result is set by means of an input/setting means 2 beforehand. After that, when a judgment means 3 receives a signal indicative of the inspection result of the product 6, the signal indicative of the content related to the defect in terms of the product having a problem in the inspection is transmitted to a printing means 4, then the printing means 4 prints the code indicative of the content related to the defect on the product 6 in one color. It is possible to expand an discrimination range of the inspection result of the product by printing in one color.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for marking a product for discriminating the quality of the product by printing information indicating an inspection result on the product.

[0002]

2. Description of the Related Art As a method for discriminating the quality of a product according to the inspection result of the product, a method of giving a predetermined color to a product in order to distinguish the inspection result by color is known. I have. For example, as a result of inspection, a specific color is given to a product determined to be good, and another color is given to a product determined to be defective,
By giving different colors depending on the reason of the defect,
The quality of the product and the content of the defect can be known.

[0003]

By the way, in the conventional method, it is difficult to cope with a variety of reasons for failure with limited options of color coding, or the structure of the marking device is complicated. And the cost of the product is increased.

An object of the present invention is to easily perform production management by printing a code indicating the content of a defect on a product.

[0005]

In order to solve the above-mentioned problems, according to the present invention, a code corresponding to each of inspection results is determined in advance, and a defective product is rejected after the inspection process. The code indicating the content is printed in one color.

Therefore, according to the present invention, the identification range of the inspection result of the product can be expanded by printing the code indicating the defect content on the product in one color.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In a method for marking a product according to the present invention, a code corresponding to each inspection result is determined in advance, and the content of the defect is rejected after the inspection process. This is a method of printing the code shown. Here, the term "manufactured product" refers to a product as a finished product or its component parts, and involves some inspection process.
In addition, the information indicating the inspection result can be displayed by printing.

The following method can be used for the code form indicating the content of a defect.

(I) A method of positively giving a code indicating good or bad (ii) A method of giving a code indicating that only when the product is defective.

First, (i) is a method of printing, on each product, a code according to whether or not the product satisfies a predetermined standard as a result of the inspection. A code indicating success is defined in advance.

[0011] In addition, (ii) shows that if the product satisfies a predetermined standard as a result of the inspection, a special code indicating that fact is not printed on the product, and the product satisfies the predetermined standard. This is a method of printing a code indicating this to the product only when there is no such code. In this case, a code indicating that the inspection has failed is defined, and a case where the result of printing on the product does not include the code indicates that the inspection has passed.

As the code, a graphic, a character or a symbol (including a number) or a combination thereof can be used, but it should be selected according to the application. For example, when it is necessary to read the code content by a predetermined device, a graphic code such as a bar code is suitable for optical reading, but by giving the code and its position a specific meaning, From the viewpoint that the administrator can easily and visually grasp the defect and the reason for the defect, notation using characters, symbols, and the like is preferable.

If the product does not satisfy a predetermined standard based on the inspection result of the product, it is preferable to print a code indicating the reason for the defect on the product in terms of process control and quality control. For example, if the code indicating the defect content of a product is defined to be composed of a code indicating the presence or absence of a defect and a code indicating the reason for the defect, the latter code is used as information for investigating the cause of the defect and controlling production. can do.

The method of printing and printing is not limited to the method of arranging codes in a horizontal line or a vertical line.
In particular, in the case of printing, various forms are possible, such as a method in which the marking is applied to a plurality of columns or a plurality of locations in a product, and the font size of the printing can be freely selected. The degree of freedom of choice is high.

[0015] When printing, in addition to the above-mentioned code, information necessary for production control such as a lot number and a manufacturing date is also printed, the number of times of printing per product can be reduced. .

FIG. 1 schematically shows the structure of a marking apparatus 1 for a product according to the present invention, which comprises an input / setting means 2, a discriminating means 3, and a printing means 4.

The input / setting means 2 is required for inputting and setting a code corresponding to the inspection result in advance. For example, in the case of the above-mentioned method (i), the input / setting means 2 has a code indicating that the inspection has passed. Enter a pass code or (i
In the method i), it is used to input a code indicating a failure of the inspection, a code indicating the reason thereof, and the like.

When a signal indicating the inspection result of the product is received, the discriminating means 3 discriminates and outputs a code corresponding to the signal, and a code set in advance by the input / setting means 2 is provided. Is specified according to the inspection result. still,
As for the signal indicating the inspection result of the product, for example, as shown in the figure, an inspection machine 7 is installed for the products 6, 6,. 7 is input to the discriminating means 3 for inputting the inspection result in a method for automating the inspection and marking processing, or when manual inspection such as visual inspection of the product 6 is required.
A semi-automatic method of inputting data from the setting means 2 to the determination means 3 can be given.

The printing means 4 prints (including printing) the print contents corresponding to the output from the discriminating means 3 on the product 6 in one color. For example, in the case of the above method (i), In the method, a code indicating the pass of the inspection or a code indicating the rejection is printed on the product 6, or a code indicating the rejection of the test or a code indicating the reason is printed on the product 6 by the method (ii). Print. In addition, as the printing means 4,
Ink jet or laser printers, markers, and the like can be used, but not limited thereto, and any printing device that can print codes on products can be used.

It is needless to say that the discriminating means 3 includes storage means for storing the setting contents of the code performed by using the input / setting means 2, but the setting contents are stored in a file or stored in a data file. Base and save (for example,
The setting contents are saved together with the result counted for each code corresponding to the inspection result and the data after the statistical processing based on the result, and desired information is obtained by a specific search key. Is preferable from the viewpoint of information reuse.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to an inspection result of an optical head will be described below with reference to FIGS.

In this embodiment, the method (ii) described above is used, and a code determined as a non-defective product based on the inspection result is printed with a code consisting only of information necessary for production management, and is determined as a defective product. In this case, a code consisting of a code indicating the defect and a code indicating the reason for the defect and a lot number are printed.

FIG. 2 shows the optical head 8 which has been determined to be acceptable. The movable part 11 includes components 9 of the optical system and a coil part 10 for focus control and tracking control.
Are supported by the support member 13 by four connecting members 12, 12,.... The connecting member 1
2 is formed using a leaf spring.

The supporting member 13 includes connecting members 12, 12,.
.. Are constituted by a rectangular parallelepiped support portion 14 to which is fixed, and a portion 15 formed by bending a portion near the end in the middle in a flat plate shape in the same direction.

A flat portion 15a having a flat plate shape in the portion 15
In the print “12034” attached to “”, the middle number “0” indicates the lot number as shown in the figure, and the three-digit number string “123” from the left without this indicates the manufacturing date. Day,
The numbers are arranged in order of month and year, and the remaining “4” is a number indicating the manufacturing specification.

FIG. 3 shows an optical head 1 determined as a rejected product.
6, the structure of which is not different from that of the optical head 8 described above.
The print “* E101” attached to 5a indicates that the optical head 16 is not a good product and the reason therefor. That is, “* E” indicates a code indicating a defect, “E” next to “E” indicates a lot number,
The remaining two digits “01” indicate the reason for the failure. In this example, as shown in FIG.
"E" and the two-digit number constitute the error code,
“* E01” indicates that the leaf spring of the connecting member 12 is bent, “* E02” indicates that the movable portion 11 has poor adhesion, and the amount of the adhesive is too large, and “* E03” indicates that the movable portion 11 is too much. No. 11 indicates that the amount of the adhesive was too small due to poor adhesion.

FIG. 4 is a flowchart showing the procedure of the marking process. First, in step S1, a code corresponding to the inspection result is set, and then in step S2, the component is inspected. Then, in step S3, it is determined whether or not the inspection result is acceptable. If the inspection result is passed, the process proceeds to step S4.

In step S4, the number consisting of the lot number and the date of manufacture is printed on the part as described above, and in step 5, the letters and numbers consisting of the error code and the lot number are printed on the part. Thereafter, in any case, the process proceeds to the next step S6.

In step S6, the end of the inspection is determined. If not, the process returns to step S2. If not, the above-described series of processes is completed through post-processing such as saving of setting codes and inspection results. .

[0030]

As is apparent from the above description, according to the first and fourth aspects of the present invention, the code indicating the content of the defect is printed in one color on the product, so that the product is printed. The range of identification of inspection results can be expanded, so that selection options are not limited as in the method using color coding, and the structure of the marking device can be simplified by eliminating the need for multicolor printing. can do.

According to the second aspect of the present invention, it is possible to improve the readability of the print result by encoding using characters or symbols, and it is possible to expand the range of choices regarding the print size and arrangement. it can.

According to the third aspect of the present invention, the code indicating the content of the defect is composed of the code indicating the presence / absence of the defect and the code indicating the reason for the defect. In addition, it is possible to flexibly deal with the addition or change of the reason for failure.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a device for marking a product according to the present invention.

FIG. 2 shows an embodiment of the present invention together with FIG. 3 and FIG. 4, and is an explanatory diagram of code printing on an acceptable product.

FIG. 3 is an explanatory diagram of code printing on a rejected product.

FIG. 4 is a flowchart showing a processing procedure.

[Explanation of symbols]

1. Marking device for product, 2. Input / setting means,
3 ... discriminating means, 4 ... printing means

Claims (4)

[Claims] 1. A method of marking information on a product by printing information indicating the result of the inspection on the product, wherein a code corresponding to each of the inspection results is determined in advance. A method for marking a product, characterized in that a code indicating the content of the defect is printed in one color for the product that has failed after the process. 2. A method for marking a product according to claim 1, wherein a code corresponding to a letter or a symbol corresponding to each of the inspection results is determined in advance, and a product rejected after the inspection process is determined. A method of marking a product, comprising printing a code indicating the content of the defect. 3. The method for marking a product according to claim 2, wherein the code indicating the content of the defect in the inspection result comprises a code indicating the presence or absence of the defect and a code indicating the reason for the defect. Marking method for products. 4. A marking device for a product for discriminating the quality of a product by printing information indicating an inspection result on the product, wherein a code corresponding to the inspection result is inputted and set in advance. An input / setting means, a discriminating means for, when receiving a signal indicating a result of inspection of a product, discriminating and outputting a code indicating the content of the defect for a rejected product; A marking device for a product, comprising: a printing unit that receives the output and prints a code indicating the content of the defect on the product in one color.