JPH02238932A - Molding of bar code on raw tire and reading of bar code - Google Patents

Abstract

PURPOSE:To make laying of bar codes easy on a tread face part and to improve processability by stamping a combination of long grooves with a triangular or semi-circular crosssection in the longitudinal and transverse directions on a part of the tread face part of a raw tire in cope with the kind of the tire. CONSTITUTION:A base plate 6 equipped with each stamping punch 8 is lowered by actuating a press cylinder 7 of a stamping apparatus 3 on a tread W transferred under an unvulcanized state and apexes 8a and 8b of each stamping punch 8 where a code has been set in cope with a kind of the raw tire are pressed thereon. It is thereby possible to stamp a bar code Z with a code corresponding to a kind of a raw tire. This bar code Z is a long groove the crosssectional shape of which is triangular or semicircular. As the method for reading the bar code Z, the bar code Z with a recessed crosssection stamped on a part of the tread part W of the raw tire is read out by means of a television camera while illuminating apparatus 1a, 1b, 1c and 1d set on front, rear, left and right direction of the tread face part W are successively turned on or off.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a method for forming a barcode on a green tire and a method for reading the barcode, and more particularly, the present invention relates to a method for forming a barcode on a green tire and a method for reading the barcode.
The present invention relates to a method for molding barcodes onto green tires and a method for reading barcodes, which allow barcodes to be easily attached to green tires and also allow the barcodes to be read accurately. [Prior Art] Conventionally, when raw tires are fed into a vulcanizer, a bar code is attached to the raw tires to facilitate sorting during transport. (Problems to be Solved by the Invention) Barcodes attached to raw tires include label barcodes and protruding barcodes (Japanese Patent Laid-Open No. 184908/1983).
Among these, label barcodes attached to the tread of raw tires have the problem that the barcodes may get buried due to the flow of rubber during tire vulcanization, and there are also problems with the barcodes attached to the treads of raw tires. In the case of a shaped barcode, it is difficult to read something with a curvature like a tire when detected by an optical detector, and it is also difficult to incorporate the playback information in the case of a reading failure, making it difficult to accurately detect the raw tire. There was a problem in that it was difficult to determine the type. [Object of the Invention] The present invention has been devised by focusing on the above-mentioned conventional problems, and it is possible to easily attach a long groove barcode having a triangular or semicircular cross section to a green tire, and The purpose of this invention is to provide a method for forming a barcode on a green tire and a method for reading the barcode, which makes it possible to read the barcode accurately and easily identify the type of green tire. [Means for Solving the Problems] In order to achieve the above object, the present invention has long grooves in a part of the tread portion of a green tire with a triangular cross section or a semicircular cross section corresponding to the type of tire in the longitudinal direction and The gist of this is that they were carved horizontally in combination. In addition, the present invention is capable of displaying a barcode having a concave cross-section engraved on a part of the tread of a green tire, while sequentially flashing a lighting device disposed above the tread in the front, rear, left and right directions, and displaying the bar code with a television camera. The gist of the system is to read the barcode images in opposing positions, superimpose them on one screen, convert the barcode displayed on this screen into an electrical signal, and compare it with the tire type to determine the type of tire. This is what we mean. [Operation of the Invention] The present invention is configured as described above, and can engrave an arbitrary barcode corresponding to the tire type on the tread surface of a green tire using a barcode stamping device, and can The engraved barcode is read by optical detection means,
Furthermore, by combining barcodes, it is possible to easily identify the type of tire. [Embodiments of the Invention] Examples of the invention will be described below based on the accompanying drawings. Fig. 1 is an overall perspective view of the barcode reading device, and Fig. 2 is a plan view of Fig. 1, showing a barcode engraved vertically and horizontally on the surface of the tread W (red) of a green tire. The lighting device 1a.Z is arranged above the lighting device 1a. The barcode Z is read with the television camera 2 while blinking 1b, lc, and ld in sequence. Also,
As shown in FIGS. 3 to 6, the marking device 3 for creating a bar code Z on the tread surface W of a green tire includes two guide rods 5a. A base plate 6 is attached in a direction perpendicular to the support plate 4 via the support plate 4.
It is supported so that it can be raised and lowered via a pressing cylinder 7 installed in the. The base plate 6 is provided with a plurality of (four in this embodiment) stamping punches 8 for stamping a long groove-shaped barcode Z having a triangular cross section or a semicircular arc cross section on the surface of the tread portion W. They are arranged in a rectangular shape at intervals and are rotatable. As shown in FIGS. 4 and 6, the tip of each stamping punch 8 has a tip 8a with a mountain shape and a tip 8b with a semicircular arc shape. The support shaft 9 is rotatably supported by the base plate 6 via a bearing member 10 such as a dry bearing. Further, the support shaft 9 of each stamping punch 8 is integrally provided with a rotation stopper 11 that restricts the rotation of each stamping punch 8 by 180 degrees. As shown in the figure, the gear 13 is fitted. Each of the gears l3 meshes with a gear 16 provided on a drive shaft 15 of a rotary drive device l4 such as a rotary actuator installed on the base plate 6, and the gears l3 and l6 constitute a gear mechanism. Therefore, the tips 8a and 8b of each marking punch 8 can be rotated in any direction by the rotational drive of the rotational drive device 14 by the gears 13 and 16, and the rotation is stopped by a rotation stopper at 180°. It is now regulated by l1. Next, to explain the method of marking the barcode 2, the marking device 3
The pressing cylinder 7 is operated to lower the base plate 6 equipped with each marking punch 8, and the tips 8a and 8b of each marking punch 8, which are set to the code corresponding to the type of raw tire, are pressed. As a result, it is possible to stamp a barcode Z with a code (vertical and horizontal) according to the type of raw tire as shown in FIG. It has a long arc-shaped groove. Next, the method for reading the barcode Z is as shown in Figs. Illumination devices 1a, l arranged on the tread portion W in four directions: front, rear, left and right
While blinking b, lc, and ld in sequence, read the barcode Z with the television camera 2 as shown in Figure 8. and,
For example, by superimposing images of barcodes Z at opposing positions such as illumination devices 1a, lc and tb, ld,
+lb+1c+1d is displayed on one screen, and the type of tire is determined by converting the barcode 2 displayed on this screen into an electrical signal and comparing it with the type of tire. By reading the barcode Z using the method described above, it is possible to read the barcode Z in the X direction shown in FIG. If any of the barcodes in the Y direction can be read, it is possible to determine the type of raw tire, and even if one barcode Z is missing on the composite screen due to poor reading, it can be easily determined by overlapping images from four locations. It is possible to distinguish. Additionally, unlike conventional label barcodes, the label barcodes are not embedded in the rubber during vulcanization of green tires, making it possible to reliably identify green tires at least until they are transported to the vulcanizer. In addition, the engraved barcode Z is
Since it is erased by the flow of rubber during vulcanization, it is not affected by the molded tire at all. [Effects of the Invention] As described above, the present invention provides a part of the tread of the raw tire,
Long grooves with a triangular or semicircular cross section are drilled in a rectangular shape in the vertical and horizontal directions in accordance with the type of tire, making it extremely easy to attach barcodes to the tread of raw tires, improving work efficiency. It also has the effect of improving Also,
A barcode with a concave cross-section is drilled into a part of the tread of a raw tire. The barcode is read by a TV camera while lighting devices installed in the front, rear, left and right directions are sequentially blinked, and the image at the opposite position is displayed. The barcodes are superimposed on one screen, and the barcode displayed on this screen is converted into an electrical signal and compared with the tire type to determine the tire type, making it possible to read the barcode accurately. It becomes easier to identify raw tires, and even if some barcodes are poorly read, the combination screen makes it easy to identify them, and it is therefore possible to include playback information in the case of poor readings. Furthermore, unlike conventional label barcodes, the label barcodes are not embedded in the rubber during vulcanization of green tires, making it possible to reliably identify green tires at least until they are transported to the vulcanizer. Furthermore, the engraved barcode is erased by the flow of rubber during vulcanization, so it does not affect the finished tire at all, and it does not affect the tire design.

[Brief explanation of drawings]

Fig. 1 is an overall perspective view of a barcode reading device embodying the present invention, Fig. 2 is a plan view of Fig. 1, Fig. 3 is a perspective view of a barcode stamping device, and Fig. 4 is a side view of the barcode stamping device. Figure 5 is a plan view of Figure 3, Figure 6 is an exploded perspective view of the marking punch, Figure 7 is an explanatory diagram showing examples of barcodes corresponding to tire types, and Figure 8 is barcode reading. This is an explanatory diagram of the method. la, l b, lc, ld... lighting device, 2... television camera, W... tread portion (tread) Z... barcode.

Claims (1)

[Claims] 1. Long grooves with a triangular cross section or a semicircular cross section are carved in a part of the tread of the green tire in combination in the vertical and horizontal directions in accordance with the type of tire. A method for forming barcodes on raw tires. 2. A barcode with a concave cross section carved into a part of the tread of the raw tire is read by a television camera while sequentially blinking a lighting device arranged above the tread in the front-rear and left-right directions; A device characterized by overlapping barcode images at opposing positions to form a single screen, converting the barcode displayed on this screen into an electrical signal and comparing it with the tire type to determine the type of tire. How to read tire barcodes.