JP4205648B2 - Tire two-dimensional code reading method and apparatus - Google Patents

Description

  The present invention relates to a tire two-dimensional code reading method and apparatus for reading a two-dimensional code provided on a tire.

Conventionally, as a two-dimensional code reading method and apparatus for this type of tire, a tire with a bar code attached is moved so that the center of the tire coincides with the center line of the transfer means, and the two-dimensional code is on the center line. In order to read a symbol string provided in a convex or concave shape on the sidewall of the tire, which is rotated by the tire until it comes and is read by a reading means arranged on the center line (see, for example, Patent Document 1) A mark portion having a fixed relationship with a symbol string and detected at a predetermined position of a tire is detected, and a character string is read by moving a reading means based on the detection result (for example, see Patent Document 2) In addition, the tire with the barcode attached to the side wall is conveyed by a belt conveyor or the like with the barcode facing upward, the tire side wall is detected by a camera, and the tire is Move code reader, is rotated by those to read the bar codes are known (e.g., see Patent Document 3).
JP-A-62-157122 JP 61-43382 A JP-A-8-101016

  However, in the tire two-dimensional code reading method and apparatus thereof described in Patent Document 2, the symbol string to be read needs to be accurately provided at a fixed position having a certain relationship with the mark portion. In addition to being unable to read a symbol string whose direction is not uniform, the symbol string is formed in the vulcanization process, and therefore cannot be used for a tire before vulcanization.

  Further, in the tire two-dimensional code reading method and apparatus of Patent Document 1 or 3, the center of the tire is moved to the center in the width direction of the conveying means by the centering means, and the reading is performed based on the position or inclination information of the barcode. Since the bar code is read by moving and rotating the means, there is a problem that the apparatus becomes larger and complicated by the moving and rotating means and the control means based on a plurality of detection results.

  In order to prevent the apparatus from becoming large and complicated, for example, it may be possible to read with a camera having a reading range of 800 mm with respect to a range of 800 mm where a bar code is provided. When a general-purpose camera having a range of 100 mm is used, eight cameras are required.

  In view of the above problems, the object of the present invention is to provide a two-dimensional code display body in which the position and orientation provided on the side surface of a tire are not uniform using an inexpensive reading means, using a reading device that can be reduced in size and simplified. It is an object to provide a tire two-dimensional code reading method and apparatus for reading the two-dimensional code information.

In order to achieve the above object, the present invention provides a tire in which a two-dimensional code display body is provided within a predetermined range of a side surface in a state in which the side surface faces downward by a roller conveyor provided with a plurality of rollers with a predetermined gap therebetween. A two-dimensional code reading method for a tire that reads the two-dimensional code information of the two-dimensional code display body from below the roller conveyor using a reading device while being transported by the reading device. A two-dimensional code display body that detects an installation range in which the three- dimensional code display body is provided in the axial direction of the roller and detects the passage of the tire and is movable in the axial direction of the roller provided in the gap. reading means for reading a dimension code information, based on the timing of the installation range is detected during the period from passing the start of the tire and the detection range of the detecting means to the passage end There are, proposes a two-dimensional code reading method of the tire by a predetermined angle inclined to the predetermined direction reading a 2-dimensional code information of the two-dimensional code display body.

  According to the present invention, while the tire provided with the two-dimensional code display body within a predetermined range of the side surface is transported in a state where the side surface faces downward by a roller conveyor provided with a plurality of rollers with a predetermined gap therebetween, The two-dimensional code information of the two-dimensional code display body is read from under the roller conveyor by the reading device. Therefore, even if the height of the roller conveyor and the other side surface of the tire changes due to different tire widths, the distance between the side surface provided with the two-dimensional code and the reading device does not change. There is no need to move it up and down.

  Further, the detection means detects the installation range where the two-dimensional code display is provided, and reads the two-dimensional code information of the two-dimensional code display provided in the gap and movable in the axial direction of the roller conveyor. The means is moved to a reading position corresponding to the installation range from a plurality of predetermined reading positions by the reading device, and the two-dimensional code information of the two-dimensional code display body is read. Accordingly, since the installation range in which the two-dimensional code display body is provided is detected in advance, it is not necessary to detect the exact position, angle (orientation), etc. in which the two-dimensional code display body is provided, and the reading The reading range of the means may be the installation range rather than the entire predetermined range of the side surface. Further, since the reading means is moved to a predetermined reading position corresponding to the installation range and the two-dimensional code information of the two-dimensional code display body is read, it is necessary to perform complex calculation based on the detection result and precise movement control. There is no.

Further, the detection means detects the installation range in the axial direction of the roller and the passage of the tire, and the installation range between the detection range of the detection means and the passage start of the tire until the end of the passage. The two-dimensional code information of the two-dimensional code display body is read by inclining the reading means by a predetermined angle in a predetermined direction based on the timing at which is detected.

  In the tire two-dimensional code reading method having the above-described configuration, the two-dimensional code display body is provided in the vicinity of the rim cushion on the side surface, and the reading device is arranged front and rear with respect to the vertical axis of the roller conveyor. A tire two-dimensional code reading method is proposed which reads the two-dimensional code information of the two-dimensional code display body by tilting the reading means by a predetermined angle in the direction corresponding to the detection range and the timing from the left and right.

  According to the present invention, the two-dimensional code display body is provided in the vicinity of the rim cushion on the side surface, and the reading device detects the detection range and the timing from among the front, rear, left and right with respect to the vertical axis of the roller conveyor. The two-dimensional code information of the two-dimensional code display is read by inclining the reading means in a corresponding direction by a predetermined angle. Accordingly, since the surface near the rim cushion on the side surface of the tire forms an almost constant angle with respect to the side surface regardless of the tire diameter, the reading means is perpendicular to the surface near the rim cushion and can be read stably. Become.

  Further, the present invention provides the tire two-dimensional code reading method configured as described above, wherein the plurality of reading positions are such that the reading range of the reading means at adjacent reading positions is equal to or longer than the length in the longitudinal direction of the two-dimensional code display body. A method for reading a two-dimensional code of a tire that is set to overlap with the above is proposed.

  According to the present invention, the plurality of reading positions are set so that reading ranges of the reading means at adjacent reading positions overlap more than the length in the longitudinal direction of the two-dimensional code display. Therefore, even when the longitudinal direction of the two-dimensional code display body is provided so as to straddle the reading range of the reading unit at adjacent reading positions, the two-dimensional code is included in the reading range of the reading unit at at least one reading position. The entire code display can be stored.

  In the tire two-dimensional code reading method configured as described above, the reading device may wait for the reading unit to stand by in the center of the moving range and read the two-dimensional code information on the two-dimensional code display. A two-dimensional code reading method for a tire that is moved to the reading position is proposed.

  According to the present invention, the reading device waits at the center of the moving range by the reading device, and moves to the reading position when reading the two-dimensional code information of the two-dimensional code display. Therefore, the movement distance of the reading means can be minimized by moving from the center in the movement range.

In order to achieve the above object, the present invention provides a tire in which a two-dimensional code display body is provided within a predetermined range of a side surface, and the side surface is directed downward by a roller conveyor provided with a plurality of rollers with a predetermined gap therebetween. A two-dimensional code reading device for a tire that reads the two-dimensional code information of the two-dimensional code display body from under the roller conveyor while being conveyed in the state, and the installation range in which the two-dimensional code display body is provided Detecting means for detecting the tire in the axial direction of the roller and detecting the passage of the tire, and being movable in the axial direction of the roller provided in the gap so as to be inclined with respect to the vertical axis of the roller conveyor reading means for reading the two-dimensional code information of the two-dimensional code display, such moves the reading position corresponding to the installation range means preparative said read from a plurality of predetermined reading position It proposes a two-dimensional code reader of the tire and a control means for controlling to read the two-dimensional code information of the two-dimensional code display body by a predetermined angle inclined to the predetermined direction.

  According to the present invention, while the tire provided with the two-dimensional code display body within a predetermined range of the side surface is transported in a state where the side surface faces downward by a roller conveyor provided with a plurality of rollers with a predetermined gap therebetween, The two-dimensional code information of the two-dimensional code display body is read from under the roller conveyor. Therefore, even if the height of the roller conveyor and the other side surface of the tire changes due to different tire widths, the distance between the side surface provided with the two-dimensional code and the reading device does not change. There is no need to move it up and down.

Further, an installation range in which the two-dimensional code display body is provided is detected by the detection means, and the two-dimensional code information of the two-dimensional code display body provided in the gap and movable in the axial direction of the roller conveyor is read. The reading means is controlled by the control means to move from a plurality of predetermined reading positions to a reading position corresponding to the installation range and read the two-dimensional code information of the two-dimensional code display. Accordingly, since the installation range in which the two-dimensional code display body is provided is detected in advance, it is not necessary to detect the exact position, angle (orientation), etc. in which the two-dimensional code display body is provided, and the reading The reading range of the means may be the installation range rather than the entire predetermined range of the side surface. Further, since the reading means is moved to a predetermined reading position corresponding to the installation range and the two-dimensional code information of the two-dimensional code display body is read, it is necessary to perform complicated calculation based on the detection result and precise movement control. There is no .

Further, the detection means detects the installation range in the axial direction of the roller and detects that the tire passes through the detection means. From the detection range of the detection means and the passage start of the tire to the end of the passage. Based on the timing at which the installation range is detected during this period, the control means controls the reading means that can be inclined with respect to the vertical axis of the roller conveyor to be inclined at a predetermined angle in a predetermined direction.

  In the present invention, the two-dimensional code display body is provided in the vicinity of the rim cushion on the side surface, and the reading means includes means capable of tilting back and forth and left and right with respect to a vertical axis of the roller conveyor, The means proposes a two-dimensional code reader for a tire having means for controlling the reading means to incline at a predetermined angle in a direction corresponding to the detection range and the timing.

  According to the present invention, the two-dimensional code display body is provided in the vicinity of the rim cushion on the side surface, and the reading means that can be tilted forward, backward, left and right with respect to the vertical axis of the roller conveyor by the control means. And a predetermined angle in a direction corresponding to the timing. Accordingly, since the surface near the rim cushion on the side surface of the tire forms an almost constant angle with respect to the side surface regardless of the tire diameter, the reading means is perpendicular to the surface near the rim cushion and can be read stably. Become.

  Further, according to the present invention, the plurality of reading positions may be set so that a reading range of the reading unit at adjacent reading positions is set to overlap with a length in a longitudinal direction of the two-dimensional code display body. A dimension code reader is proposed.

  According to the present invention, the plurality of reading positions are set so that reading ranges of the reading means at adjacent reading positions overlap more than the length in the longitudinal direction of the two-dimensional code display. Therefore, even when the longitudinal direction of the two-dimensional code display body is provided so as to straddle the reading range of the reading unit at adjacent reading positions, the two-dimensional code is included in the reading range of the reading unit at at least one reading position. The entire code display can be stored.

  Further, the present invention provides a tire two-dimensional code having means for causing the reading means to stand by at the center in a moving range and moving the reading means to the reading position when reading the two-dimensional code information of the two-dimensional code display body. A reading device is proposed.

  According to the present invention, the reading unit is made to wait at the center in the movement range, and is moved to the reading position when reading the two-dimensional code information of the two-dimensional code display body. Therefore, the movement distance of the reading means can be minimized by moving from the center in the movement range.

  According to the present invention, the side surface of the tire provided with the two-dimensional code display body with irregular positions and orientations is read from under the roller conveyor that conveys the tire in a downward state, and the two-dimensional code display body is provided in advance. 2D code information of the 2D code display body is read by moving the reading means to a predetermined reading position corresponding to the installation range, so that complicated calculation and precise movement control based on the detection result are performed. Therefore, the reading apparatus can be reduced in size and simplified.

  Further, since the reading range of the reading unit may be an installation range detected by the detecting unit, an inexpensive general-purpose camera can be used as the reading unit.

  Furthermore, stable reading is possible by tilting the reading means by a predetermined angle in a direction perpendicular to the surface on which the two-dimensional code display is provided.

  The above object and other objects, configurations, features, and effects of the present invention will become apparent from the following description and the accompanying drawings.

  1 to 17 show an embodiment of the present invention. FIG. 1 is a block diagram of a tire two-dimensional code reader according to an embodiment of the present invention. FIG. 2 is a diagram of a tire according to an embodiment of the present invention. 3 is a schematic perspective view of the two-dimensional code reader, FIG. 3 is a diagram showing a range in which the two-dimensional code display body is provided in one embodiment of the present invention, and FIG. 4 is a side view on which the two-dimensional code display body is provided, a reading sensor, FIG. 5 is an overall flowchart of a tire two-dimensional code reader according to an embodiment of the present invention, FIG. 6 is a flowchart of detection processing shown in FIG. 5, and FIG. 7 is a control shown in FIG. 8 is a flowchart of the reading process shown in FIG. 5, FIG. 9 is a diagram showing a detection range of the display body detection sensor in one embodiment of the present invention, and FIG. 10 is a diagram showing the tire detection sensor and the sensor shown in FIG. The figure which shows the detection result of a display body detection sensor, FIG. 11 is a figure explaining the inclination direction of the reading sensor in one Embodiment of this invention, FIG. 12 shows the display body detection sensor and reading sensor in one Embodiment of this invention FIG. 13 is a diagram for explaining the relationship between the display body detection sensor and the two-dimensional code display body shown in FIG. 12, and FIG. 14 shows the relationship between the display body detection sensor and the two-dimensional code display body shown in FIG. FIG. 15 is a diagram illustrating the relationship between the detection range of the display body detection sensor illustrated in FIG. 12 and the reading range. FIG. 16 is a diagram illustrating the reading range at the adjacent reading position illustrated in FIG. 17 is a view showing the correspondence between the display body detection sensor and the reading position shown in FIG.

  First, the configuration of a tire two-dimensional code reader according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4.

  A roller conveyor 40 in which a plurality of rollers 41 are provided in parallel in a direction perpendicular to the conveyance direction of the tire 1 with a predetermined gap therebetween, and each roller 41 is rotated in the same direction at a predetermined speed by a belt 42 or the like. The tire 1 is conveyed with the side surface on which the code display body 2 is provided facing downward.

  The tire 1 conveyed by the roller conveyor 40 includes a plurality of types of tires 1 having different inner diameters, tire widths, and the like, and the two-dimensional code display body 2 to be read is printed with, for example, a QR code or a barcode. It is provided in a predetermined range R on the side surface of the tire 1, for example, in the vicinity of the rim cushion, etc., and at which position in the range and at which angle (orientation) is conveyed depending on the conveyance state. .

  The tire two-dimensional code reader 100 uses the reading sensor 32 to read the two-dimensional code information of the two-dimensional code display body of the tire that is conveyed with the side surface provided with the two-dimensional code display body 2 facing downward. Read from below the roller conveyor 40. Therefore, even if the heights H1 and H2 between the roller conveyor 40 and the other side surface of the tire 1 change due to the different tire widths, the distance D between the side surface provided with the two-dimensional code and the reading sensor does not change. It is not necessary to move the reading sensor 32 in the vertical direction.

  The tire two-dimensional code reader 100 includes a detector 10, a controller 20, and a reader 30.

  The detection unit 10 is a detection unit of the tire two-dimensional code reading device 100 and includes a tire detection sensor 11 and a display body detection sensor 12.

  The tire detection sensor 11 is composed of a well-known device such as a phototube, for example, and is provided in the center of the roller conveyor 40 on the foremost side in the conveyance direction of the tire 1 to measure the amount of light reflected on the side surface of the tire 1 that has been conveyed. Thus, the tire 1 is detected. In addition, it is preferable to make the tire 1 come to the center of the roller conveyor 40 beforehand by the centering mechanism etc. which are not shown in figure.

  The display body detection sensor 12 is made of a known device such as a laser sensor, for example, and is provided in the axial direction of the roller 41 immediately after the tire detection sensor 11 so that the detection range is equal to or greater than the required reading width W. In the detection range, the two-dimensional code display 2 is detected in response to laser light reflected on a white object such as a label used for the two-dimensional code display 2. A plurality of display body detection sensors 12 may be provided so that the detection range is not less than the required reading width W not only in the axial direction of the roller 41 but also in the conveyance direction of the tire 1.

  The reading unit 30 is a reading unit of the tire two-dimensional code reading device 100, and includes a moving tilt mechanism 31 and a reading sensor 32, and between the rollers 41 after the tire detection sensor 11 in the conveyance direction of the tire 1. It is provided in the gap.

  The moving tilt mechanism 31 supports the reading sensor 32 so as to be movable in the axial direction of the roller 41 and tilted at a predetermined angle with respect to the vertical axis of the roller conveyor 40, for example, front and rear, left and right, and a motor and a cylinder (not shown). It operates with the power of etc.

  The reading sensor 32 is formed of a known device such as a general-purpose camera having a narrow reading range, for example, and reads the two-dimensional code information of the two-dimensional code display body 2 in the reading range.

  The control unit 20 is a control unit of the tire two-dimensional code reader 100, and includes, for example, a well-known device such as a microcomputer, and is connected to the tire detection sensor 11, the display body detection sensor 12, the moving tilt mechanism 31, and the reading sensor 32. The operation of the reading unit 30 is determined based on the detection result of the detection unit 10.

  Next, the operation of the tire two-dimensional code reader according to one embodiment of the present invention will be described with reference to FIGS.

  The operation of the tire two-dimensional code reader 100 includes a detection process (S10), a control process (S20), and a reading process (S30), which are processed by the detection unit 10, the control unit 20, and the reading unit 30, respectively.

  In the detection process S <b> 10, it is detected that the installation range in which the two-dimensional code display body 2 is provided and the tire 1 pass through the detection unit 10. Therefore, since the installation range in which the two-dimensional code display body 2 is provided is detected in advance, it is not necessary to detect the exact position, angle (orientation), etc. in which the two-dimensional code display body 2 is provided, and the reading sensor The reading range 32a of 32 may be an installation range instead of the entire predetermined range R on the side surface of the tire 1.

  The tire detection sensor 11 detects that the amount of light to be measured changes when the side surface of the tire 1 reaches the tire detection sensor 11 and the tire 1 starts to pass (S11).

  The plurality of display body detection sensors 12 detect the two-dimensional code display body 2 provided on the side surface of the passing tire 1 and detect the one or more display body detection sensors 12 that have detected the two-dimensional code display body 2. Based on the range, the installation range in which the two-dimensional code display body 2 in the axial direction of the roller 41 is provided is detected (S12).

  In the tire detection sensor 11, the light amount to be measured decreases when the hollow portion of the tire 1 reaches the tire detection sensor 11, and the side surface of the tire 1 passes through the tire detection sensor 11 again to increase the light amount to be measured. Then, it decreases again and it is detected that the tire 1 has finished passing (S13).

  Next, in the control process S20, the installation range is detected between the detection range of the display body detection sensor 12 that detects the two-dimensional code display body 2 and the passage start of the tire 1 detected by the tire detection sensor 11 until the end of the passage. The direction in which the reading sensor 32 is inclined with respect to the vertical axis of the roller conveyor 40 is determined on the basis of the timing of recording.

  As shown in FIG. 9, the detection ranges of the plurality of display body detection sensors 12 are divided into three widths of width Wa, width Wb, and width Wc, and the control unit 20 displays the two-dimensional code display body 2 detected. Which width the body detection sensor 12 belongs to is identified (S21).

  As shown in FIG. 10, the time from the start of passage of the tire to the end of passage detected by the tire detection sensor 11 is divided into three timings of timing Ta, timing Tb, and timing Tc. The amount of light measured by 11 and the response of the display body detection sensor 12 are compared on the time axis, and the timing at which the display body detection sensor 12 detects the two-dimensional code display body 2 is identified (S22).

  The range R in the vicinity of the rim cushion where the two-dimensional code display 2 on the side surface of the tire 1 is provided is divided into four areas R1, R2, R3, and R4 as shown in FIG. Corresponding to the identified range and timing from the front, rear, left and right with respect to the vertical axis, if the width Wb is the timing Ta, the direction of the range R1 (front), and if the width Wc is the timing Tb, the range R2 The direction in which the reading sensor 32 is tilted is determined in the direction (right), the width Wb and the timing Tc in the range R3 (rear), and the width Wa and the timing Tb in the range R4 (left). (S23).

  Note that the direction in which the reading sensor 32 is tilted is not limited to front, rear, left, and right, and the number of divisions of the widths Wa to Wc, the timings Ta to Tc, and the ranges R1 to R4 is appropriately changed according to a predetermined tiltable direction. The

  Similarly, a reading position for moving the reading sensor 32 is determined from a plurality of predetermined reading positions corresponding to the installation range of the two-dimensional code display body 2.

  For example, as shown in FIG. 12, for the required reading width W of the tire 1 is 850 mm, 17 display body detection sensors 12a to 12q having a detection range of 50 mm are provided, and the length in the longitudinal direction is 25 mm. When the installation range of the display body 2 is detected, the two-dimensional code display is performed with respect to the detection range of one display body detection sensor 12, as shown in FIG. One when the entire body 2 fits, and two display body detection sensors 12 detect the two-dimensional code display body 2 when straddling the adjacent display body detection sensor 12 as shown in FIG. The installation range of the two-dimensional code display body 2 is detected by the detection ranges of the two display body detection sensors 12. Accordingly, the control unit 20 identifies which of the 17 display body detection sensors 12 has detected the two-dimensional code display body 2 (S24).

  For the reading sensor 32 having a reading range 32a of 100 mm, eleven reading positions P1 to P11 corresponding to the installation range of the two-dimensional code display body 2 with respect to the required reading width W are defined.

  As shown in FIG. 15, the reading range at the reading positions P1 to P11 of the reading sensor 32 and the detection range of the display body detection sensors 12a to 12q are as follows. The reading range 32a at the reading position P1 is detected by the display body detection sensors 12a and 12b. The reading range 32a at the reading position P2 is half the detection range of the display body detection sensor 12b, the display body detection sensor 12c and the display body detection sensor 12d, and the reading range 32a at the reading position P3 is the display body detection sensor 12d. In the detection range of 12e, the reading range 32a at the reading position P4 is displayed in the detection range of half of the display body detection sensor 12e, the display body detection sensor 12f and the display body detection sensor 12g, and the reading range 32a in the reading position P5 is displayed. The detection range of the body detection sensors 12g and 12h and the reading range 32a at the reading position P6 are read in the detection ranges of half of the display body detection sensor 12h and half of the display body detection sensor 12i and the display body detection sensor 12j. The reading range 32a at the position P7 is the detection range of the display body detection sensors 12j and 12k, and the reading range 32a at the reading position P8 is the detection of the half of the display body detection sensor 12k, the display body detection sensor 12l, and the half of the display body detection sensor 12m. The reading range 32a at the reading position P9 is the detection range of the display body detection sensors 12m and 12n, and the reading range 32a at the reading position P10 is half of the display body detection sensor 12n, the display body detection sensor 12o, and the display body detection sensor 12p. The reading range 32a at the reading position P11 corresponds to the detection range of the display body detection sensors 12p and 12q, respectively.

  The reading range of the reading sensor 32 at the adjacent reading position is set to overlap by half of the detection range of the display body detection sensor 12, that is, 25 mm.

  When the reading ranges of the reading sensors 32 at adjacent reading positions do not overlap or the overlapping length is less than the length in the longitudinal direction of the two-dimensional code display 2, the two-dimensional code display 2 is included in the reading range 32a. However, as shown in FIG. 16, the reading range 32 a of the reading sensor 32 at the adjacent reading position is set to overlap with the length in the longitudinal direction of the two-dimensional code display body 2. Therefore, even when the longitudinal direction of the two-dimensional code display body 2 is provided so that the two-dimensional code display body 2 straddles the reading range 32a of the reading means at the adjacent reading position, at at least one reading position. The entire two-dimensional code display body 2 can be accommodated in the reading range 32a of the reading sensor 32.

  Accordingly, as shown in FIG. 17, when the display body detection sensor 12 identified in S24 is the display body detection sensor 12a, the display body detection sensors 12a, 12b, or the display body detection sensor 12b, the display body is displayed at the reading position P1. When the detection sensor 12b, 12c or the display body detection sensor 12c or the display body detection sensor 12c, 12d, the reading position P2, and when the display body detection sensor 12d, the display body detection sensor 12d, 12e or the display body detection sensor 12e, the reading. When the display body detection sensor 12e, 12f or the display body detection sensor 12f or the display body detection sensor 12f, 12g is at the position P3, the display body detection sensor 12g, the display body detection sensor 12g, 12h or the display body detection is detected at the reading position P4. In the case of the sensor 12h, it is at the reading position P5, and in the case of the display body detection sensors 12h, 12i or the display body detection sensors 12i or the display body detection sensors 12i, 12j, at the reading position P6, the display body detection sensor 12j or the display body detection sensor 12j. 12k or display object detection In the case of the sensor 12k, it is at the reading position P7, and in the case of the display body detection sensors 12k, 12l or the display body detection sensor 12l or the display body detection sensors 12l, 12m, it is at the reading position P8, the display body detection sensor 12m or the display body detection sensor 12m. , 12n or the display object detection sensor 12n, the display object detection sensor 12p is at the reading position P9, and the display object detection sensors 12n, 12o or the display object detection sensor 12o or the display object detection sensors 12o, 12p are at the reading position P10. Alternatively, when the display body detection sensors 12p and 12q or the display body detection sensor 12q, the controller 20 determines the reading positions P11 and the reading positions P1 to P11 (S25).

  Needless to say, the processing order of S21 to S23 and S24 and S25 may be changed.

  Finally, in the reading process S30, when the reading sensor 32 is put on standby at the reading position P6 that is the center of the movement range and the two-dimensional code information of the two-dimensional code display body 2 is read, a predetermined direction is determined in the direction determined in S23. The angle is inclined and moved to the reading positions P1 to P11 determined in S25. By moving from the center of the moving range, the moving distance of the reading sensor 32 can be minimized.

  The moving tilt mechanism 31 tilts the reading sensor 32 by a predetermined angle from the front, rear, left, and right in the direction determined in S23 (S31). Since the surface near the rim cushion on the side surface of the tire 1 forms an almost constant angle with respect to the side surface regardless of the tire diameter, the tire width, etc., the reading sensor 32 is perpendicular to the surface near the rim cushion and is stably read. Is possible.

  The moving tilt mechanism 31 moves the reading sensor 32 to the reading position determined in S25 (S32), and the reading sensor 32 reads the two-dimensional code information of the two-dimensional code display body 2 in the reading range 32a (S33). Accordingly, since the reading sensor 32 is moved to a predetermined reading position corresponding to the installation range and the two-dimensional code information of the two-dimensional code display body 2 is read, it is necessary to perform complicated calculation and precise movement control based on the detection result. Absent.

  As described above, according to the configuration and operation described above, the reading sensor 32 reads from the lower side of the roller conveyor 40 that conveys the side surface of the tire 1 provided with the two-dimensional code display body 2 with irregular positions and orientations in a downward state. The vertical movement mechanism is not required, and the two-dimensional code is detected by moving the reading sensor 32 to a predetermined reading position corresponding to the installation range by detecting the installation range in which the two-dimensional code display 2 is provided in advance. Since the two-dimensional code information of the display body 2 is read, it is not necessary to perform complicated calculation and precise movement control based on the detection result, and the reading apparatus can be reduced in size and simplified.

  Further, since the reading range 32a of the reading sensor 32 may be an installation range detected by the display body detection sensor 12, an inexpensive general-purpose camera can be used as the reading sensor 32.

  Furthermore, the reading sensor 32 is inclined by a predetermined angle in a direction perpendicular to the surface on which the two-dimensional code display body 2 is provided, thereby enabling stable reading.

  In addition, the structure of this invention is not limited only to the said embodiment, You may add a various change within the range which does not deviate from the summary of this invention.

1 is a block diagram of a tire two-dimensional code reader according to an embodiment of the present invention. 1 is a schematic perspective view of a tire two-dimensional code reader according to an embodiment of the present invention. The figure which shows the installation range of the two-dimensional code display body in one Embodiment of this invention The figure explaining the distance of the side surface in which the two-dimensional code display body was provided, and a reading sensor 1 is an overall flowchart of a tire two-dimensional code reader according to an embodiment of the present invention. Flowchart of the detection process shown in FIG. Flowchart of the control process shown in FIG. Flowchart of the reading process shown in FIG. The figure which shows the detection range of the display body detection sensor in one Embodiment of this invention. The figure which shows the detection result of the tire detection sensor and display body detection sensor which were shown in FIG. The figure explaining the inclination direction of the reading sensor in one Embodiment of this invention The figure which shows the display body detection sensor and reading sensor in one Embodiment of this invention. The figure explaining the relationship between the display body detection sensor shown in FIG. 12, and a two-dimensional code display body. The figure explaining the relationship between the display body detection sensor shown in FIG. 12, and a two-dimensional code display body. The figure which shows the relationship between the detection range and reading range of the display body detection sensor shown in FIG. The figure explaining the reading range in the adjacent reading position shown in FIG. The figure which shows a response | compatibility with the display body detection sensor shown in FIG. 12, and a reading position.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Tire, 2 ... Two-dimensional code display body, 10 ... Detection part, 11 ... Tire detection sensor, 12, 12a-12q ... Display body detection sensor, 20 ... Control part, 30 ... Reading part, 31 ... Moving inclination part, 32 ... Reading sensor, 32a ... Reading range, 40 ... Roller conveyor, 41 ... Roller, 42 ... Belt, S10 ... Detection processing, S20 ... Control processing, S30 ... Reading processing, R, R1-R4 ... Range, W ... Reading required Width, D ... Distance, H1, H2 ... Height, Wa, Wb, Wc ... Width, Ta, Tb, Tc ... Timing, P1-P11 ... Reading position.

Claims (8)

Using a reading device, the tire provided with a two-dimensional code display body within a predetermined range of the side surface is conveyed with the side surface facing downward by a roller conveyor provided with a plurality of rollers with a predetermined gap therebetween. A tire two-dimensional code reading method for reading two-dimensional code information of the two-dimensional code display body from below a roller conveyor,
The reader is
Detecting the installation range in which the two-dimensional code display body is provided by the detecting means in the axial direction of the roller and detecting the passage of the tire;
Reading means for reading the two-dimensional code information of the two-dimensional code display body provided in the gap and movable in the axial direction of the roller, between the detection range of the detection means and the passage start of the tire until the end of the passage. A two-dimensional code reading method for a tire, wherein the two-dimensional code information of the two-dimensional code display body is read at a predetermined angle in a predetermined direction based on a timing at which an installation range is detected . The two-dimensional code display body is provided near the rim cushion on the side surface,
The reader is
The two-dimensional code information of the two-dimensional code display body is read by inclining the reading means by a predetermined angle in a direction corresponding to the detection range and the timing from the front, rear, left and right with respect to the vertical axis of the roller conveyor. The tire two-dimensional code reading method according to claim 1 , wherein the tire is two-dimensional code reading. The plurality of reading positions are:
3. The two-dimensional tire according to claim 1, wherein a reading range of the reading means at adjacent reading positions is set to overlap more than a length in a longitudinal direction of the two-dimensional code display body. Code reading method. The reader is
The tire according to any one of claims 1 to 3, wherein the reading unit waits at a center in a moving range and moves to the reading position when reading the two-dimensional code information of the two-dimensional code display body. Two-dimensional code reading method. A tire having a two-dimensional code display body within a predetermined range of the side surface is conveyed from below the roller conveyor while the side surface is conveyed downward by a roller conveyor having a plurality of rollers with a predetermined gap therebetween. A tire two-dimensional code reader for reading two-dimensional code information of the two-dimensional code display body,
Detecting means for detecting an installation range in which the two-dimensional code display body is provided in the axial direction of the roller and detecting the passage of the tire ;
Reading means for reading two-dimensional code information of a two-dimensional code display body provided in the gap and capable of moving in the axial direction of the roller in a state in which the roller conveyor can be inclined with respect to the vertical axis ;
Moving the said read means from among a plurality of predetermined reading position the reading position corresponding to the installation range to Rutotomoni predetermined direction by a predetermined angle inclined to control to read two-dimensional code information of the two-dimensional code display body And a two-dimensional code reading device for a tire. The two-dimensional code display body is provided near the rim cushion on the side surface,
The reading means includes
Means capable of tilting back and forth and left and right with respect to the vertical axis of the roller conveyor;
The control means includes
The tire two-dimensional code reading device according to claim 5 , further comprising means for controlling the reading means to incline at a predetermined angle in a direction corresponding to the detection range and the timing. The plurality of reading positions are:
7. The two-dimensional tire according to claim 5, wherein a reading range of the reading means at adjacent reading positions is set to overlap more than a length in a longitudinal direction of the two-dimensional code display body. Code reader. 8. The apparatus according to claim 5 , further comprising: a unit that moves the reading unit to the reading position when reading the two-dimensional code information of the two-dimensional code display body by waiting at the center in the moving range. two-dimensional code reader of the tire according to any.

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