JPS5959277A - Formation of discriminating bar of rubber product - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a method for forming identification bars on rubber products.

It is a well-known method to print a barcode (identification bar) on the identification surface of a product and read it with a sensor to identify the type of product. 1. Printing method is very difficult as it requires precision, and the method of pasting a barcode printed label onto a rubber product is difficult because the rubber product flows during vulcanization, so the pasting position may fluctuate or there may be damage to the rubber product. In addition, the label may become discolored due to high temperatures.

Another option is to engrave a barcode on the identification surface of the rubber product, but since the engraved part and other parts are completely black and there is no contrast, it simply appears as an uneven pattern, so this method is not recommended. It was very difficult to read with a sensor.

The present invention has been made in view of the above-mentioned conventional problems, and uses an inkjet printer to directly spray contrast paint onto the identification surface of rubber products that lack contrast, with different regularities depending on the type of rubber product. In this way, an identification bar can be formed easily and with high accuracy even on rubber products without contrast, which can be read by a sensor.

Embodiments of the invention will now be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the tire 11 is rotatably supported by a support stand 12, and the sidewall surface 11a of the tire 11 has
An inkjet printer 4 supported by a support stand 13 is faced to the printer.

Although not specifically shown, the inkjet printer 4 has a nozzle for spraying paint, and one or more of these nozzles are arranged so as to face perpendicularly to the wall surface 11. are doing.

The timing of spraying the paint from the nozzle is controlled by a microcomputer 7 as described below.

The support stand 12 is provided with a timing pulse generator 15 that generates a timing pulse at every fixed small rotation angle of the tire 11, and also detects a start mark (not shown) provided at a reference position of the tire 11. A start signal output device 16 is provided for outputting a start signal that defines the timing of starting painting.

The timing pulse output from the timing pulse generator 15 and the start signal output from the start signal output device 16 are input to the microcomputer 17.

The microcomputer 17 shown in FIG.
M) 19, a random access memory (I(AM)) 20, and an external storage device 21.
, start signal output device 16 and external storage device 21
I10 interfaces 22, 23, 24 and 25 are interposed between the central processing unit 18 and the central processing unit 18, respectively.

As shown in FIG.
~Memorize the pattern of B3.

For example, as shown in FIG. 4, one unit U of bars or spaces of a bar code is divided into five parts, and the necessary bar codes are decomposed into units of division and stored in the external storage device 21.

Specifically, Ul, U3. U5 is Par Go-Tonoha@
, U2. U4 Is it the space part of the hubr cord?
Divide this into each division unit of 1 to 35, and
The division unit of ~5 is "1", the division unit of 6 to 10 is 0",
11 to 20 are stored as 'l', 21 to 30 as 0'', 31 to 35 as ``1'', and so on.

This memorized data is sent to the nozzle control circuit of the inkjet printer 14 in accordance with the timing pulse sent by the rotation of the tire 11, and paint is ejected from the nozzle according to this data when it is 1" and when it is 0". Since no injection occurs when , the sidewall surface 11a of the tire 11
A barcode is formed.

Since the tire 11 is jet black, the paint (ink) sprayed from the nozzle is selected to be white or yellow, which is easy to contrast.

1. The read values on the identification bars B1 to B3 represent, for example, one-digit numerical values shown in Table 1.

Table 1 Therefore, by making the numerical codes in the identification bars B1 to B3 correspond in advance to specific tire types, etc. as shown in Table 2, it is possible to know the tire type, etc. by determining the numerical codes.

Table 2 Tire 1 with identification bars (barcodes) Bl to B3 formed
1 identifies the identification bar with an identification device as shown in FIG. That is, when the sensor 30 is placed opposite the identification bar B'1-13 of the tire 11 and the tire 11 is rotated, the output signal of the sensor 30 is input to the bar state determination circuit 31.
The output signal is read in binary coded decimal notation to determine whether it is 1" or 20", and then the code decoding circuit 32 decodes it into a numerical code of, for example, "957", and then the code/tire type conversion circuit 33 reads 957" tire 11. The type of is 10゜000
- 20TK and convert it to the display device 34.
will be displayed externally.

As is clear from the above description, since the present invention forms identification bars by directly spraying paint onto rubber products using an inkjet printer, conventional printing methods, labeling methods, and All problems caused by the marking method have been resolved, and identification bars that can be read by a sensor can be formed easily and with high precision even on non-contrast rubber products.

[Brief explanation of drawings]

Fig. 1 is a side view of an identification bar forming device, Fig. 2 is a control circuit diagram of the device shown in Fig. 1, Fig. 3 is a side view of a tire on which an identification bar is formed, and Fig. 4 shows the procedure for forming an identification bar. The pattern diagram shown in FIG. 5 is an identification bar identification circuit diagram. 11... Tire, lla... Sidewall surface, 1
4... Inkjet printer, 17... Microcomputer, 21... External storage device, B1-B5.
...Identification bar, 30...Sensor, 34...Display device. Patent applicant Sumitomo Rubber Industries Co., Ltd. Representative Patent attorney Aoyama Hajime and two others Figure 1 Figure 2

Claims (1)

[Claims] (1) A distinctive feature is that an inkjet printer sprays contrast-producing paint directly onto the identification surface of rubber products that lack contrast, with different regularities depending on the type of rubber product, to form identification bars. A method for forming identification bars for rubber products.