JP2018086754A - Shape measurement device and measurement method for tire rubber material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide shape measurement technique that can provide highly reproducible measurement result and allows for shortening of a measurement time upon measurement of the width and thickness of a tire rubber member.SOLUTION: A shape measurement device for measuring the shape of a tire rubber material is provided that comprises: a pair of upper and lower laser displacement sensors arranged to face two respective surfaces of the tire rubber material and configured to measure the distances to respective surfaces of the tire rubber material; a color camera configured to detect a mark put on the tire rubber material; a moving device configured to move a pair of the upper and lower laser displacement sensors and the color camera along a width direction of the tire rubber material; an encoder configured to measure the respective moving positions of the pair of laser displacement sensors; and a calculator configured to calculate the thickness and width of the tire rubber material by acquiring data transmitted by the pair of laser displacement sensors and the encoder.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a shape measuring device and a shape measuring method for measuring the shape of a tire rubber material such as a tread or a sidewall constituting a tire.

  Tires are manufactured by laminating tire rubber members such as treads and sidewalls. At this time, if the rubber member for each tire does not have a prescribed shape, there is a possibility that a tire with stable quality cannot be obtained. For this reason, conventionally, the width and thickness of the manufactured tire rubber member are measured off-line to confirm whether or not the shape is as prescribed.

  In this shape measurement, a pair of laser displacement sensors provided so as to sandwich the rubber member for tires from above and below, an encoder for digitizing the position of the laser displacement sensor, and data obtained from the laser displacement sensor and the encoder A shape measuring device including an arithmetic unit that calculates and outputs the width and thickness of a rubber member for a tire is used (for example, Patent Documents 1 and 2).

  At this time, regarding the thickness, the thickness at a specific point is measured, and the value is set as the thickness of the target tire rubber member.

  Specifically, a tire rubber member is arranged between a pair of upper and lower laser displacement sensors, and after the operator moves the pair of upper and lower laser displacement sensors to a specific point, the operator presses the measurement start button. By pressing, a laser is irradiated on the front and back surfaces of the tire rubber member from a pair of upper and lower laser displacement sensors, and the distance from each laser displacement sensor is measured. Thereafter, the data obtained by each laser displacement sensor is taken into a computing unit such as a personal computer to calculate the thickness data. On the other hand, the data obtained by the encoder is similarly taken into the computing unit to calculate the position data. And the shape of the rubber member for tires is calculated | required from the obtained thickness data and position data.

Japanese Patent Laid-Open No. 2006-23077 JP 2016-14633 A

  However, in the conventional measurement technique described above, since the movement of the laser displacement sensor to a specific point is left to the manual work of the operator, the deviation of the measurement position is unavoidable due to the level of proficiency of the worker, etc. It is difficult to obtain high measurement results.

  In addition, since the measurement is performed after the laser displacement sensor is moved and stopped by the handle operation, it takes time for the measurement.

  Accordingly, the present invention provides a shape measurement technique that can obtain highly reproducible measurement results and can reduce the measurement time when measuring the width and thickness of a tire rubber member. And

  As a result of intensive studies to solve the above problems, the present inventor has found that the above problems can be solved by the invention described below, and has completed the present invention.

The invention described in claim 1
A shape measuring device for measuring the shape of a rubber material for tires,
A pair of upper and lower laser displacement sensors disposed opposite to both surfaces of the tire rubber material to measure the distance to each surface of the tire rubber material;
A color camera for detecting a mark on the tire rubber material;
A moving device that moves the pair of upper and lower laser displacement sensors and the color camera along the width direction of the rubber material for tires;
An encoder that measures the position of the pair of upper and lower laser displacement sensors that move; and
A shape measurement of a rubber material for a tire, comprising: a calculator that takes in data transmitted from the pair of upper and lower laser displacement sensors and the encoder and calculates a thickness and a width of the tire rubber material. Device.

The invention described in claim 2
The moving device is a slider attached to each of two upper and lower linear rails;
The upper slider has the upper laser displacement sensor and the color camera arranged at predetermined intervals.
2. The shape measuring apparatus for a tire rubber material according to claim 1, wherein the lower laser displacement sensor is disposed so that the lower laser displacement sensor faces the upper laser displacement sensor.

The invention according to claim 3
The shape measuring device for a rubber material for a tire according to claim 2, wherein a slider attached to each of the two upper and lower linear rails is configured to move in synchronization by a drive motor. It is.

The invention according to claim 4
The shape of the rubber material for tire according to claim 2 or 3, wherein the moving device is provided with an automatic return mechanism for automatically returning the slider after completion of measurement to an initial standby position. It is a measuring device.

The invention described in claim 5
5. The detection reference of the mark attached on the tire rubber material in the color camera is set in two stages according to the inclination of the tire rubber material. It is a shape measuring apparatus of the rubber material for tires given in any 1 paragraph.

The invention described in claim 6
A method for measuring the shape of a rubber material for a tire, which measures the shape of the rubber material for a tire using the shape measuring device for a rubber material for a tire according to any one of claims 1 to 5,
The pair of upper and lower laser displacement sensors and the color camera are moved along the width direction of the tire rubber material using the moving device,
The position at which the thickness of the rubber material for the tire is first detected by the pair of upper and lower laser displacement sensors is obtained from the data of the encoder as the start position, while the position of the rubber material for the tire is determined by the pair of upper and lower laser displacement sensors. The position where thickness is no longer detected is determined from the data of the encoder as the end position, the distance between the start end position and the end position is calculated as the width of the tire rubber material,
After the color camera detects the mark attached on the tire rubber material, the thickness at the position of the mark attached on the tire rubber material is measured by the pair of upper and lower laser displacement sensors, and the tire It is calculated as the thickness of the rubber material for a tire, and is a method for measuring the shape of the rubber material for a tire.

The invention described in claim 7
A method for measuring the shape of a rubber material for a tire, which measures the shape of the rubber material for a tire using the shape measuring device for a rubber material for a tire according to any one of claims 1 to 5,
Moving the pair of upper and lower laser displacement sensors and the color camera along the width direction of the tire rubber material using the moving device; and
Obtaining a position at which the thickness of the rubber material for the tire is first detected by the pair of upper and lower laser displacement sensors to be moved from the data of the encoder and setting it as a start position of the rubber material for the tire;
Detecting the mark on the tire rubber material by the moving color camera;
Measuring the thickness at the position of the detected mark with the pair of upper and lower laser displacement sensors, calculating the thickness of the tire rubber material, and measuring the thickness of the tire rubber material;
Obtaining the position where the thickness of the rubber material for tire is no longer detected by the pair of upper and lower laser displacement sensors moving from the data of the encoder and setting it as the end position of the tire rubber material;
And a step of calculating the distance between the obtained start end position and the end position as the width of the tire rubber material and measuring the width of the tire rubber material. This is a method for measuring the shape of a rubber material.

The invention according to claim 8 provides:
The measurement of the thickness at the position of the mark attached on the tire rubber material is performed by outputting a trigger signal from the color camera that has detected the mark attached on the tire rubber material. It is a shape measuring method of the rubber material for tires of Claim 6 or Claim 7.

The invention according to claim 9 is:
9. After the measurement of the shape of the rubber material for tire is completed, the pair of upper and lower laser displacement sensors and the color camera are returned to a standby position by the automatic return mechanism. The tire rubber material shape measuring method according to any one of the above.

The invention according to claim 10 is:
The color of the mark attached | subjected on the said rubber material for tires is a color which can be distinguished with respect to the color of the cloth | dough of the said rubber material for tires, The any one of Claim 6 thru | or 9 characterized by the above-mentioned. It is the shape measuring method of the rubber material for tires as described in above.

The invention according to claim 11
The tire rubber material shape measuring method according to any one of claims 6 to 10, wherein the color of the mark attached on the tire rubber material is silver.

The invention according to claim 12
The tire rubber according to any one of claims 6 to 11, wherein a moving speed of the pair of upper and lower laser displacement sensors and the color camera is 3.0 to 6.0 mm / s. This is a method for measuring the shape of a material.

The invention according to claim 13
The tire rubber material shape measuring method according to any one of claims 6 to 12, wherein the tire rubber material to be measured is a tread or a sidewall.

  According to the present invention, when measuring the width and thickness of a rubber member for tires, it is possible to provide a shape measurement technique that can obtain highly reproducible measurement results and can shorten the measurement time. .

It is a figure which illustrates typically the shape measuring device of the rubber material for tires concerning one embodiment of the present invention. It is a figure which illustrates typically the shape measuring method of the rubber material for tires concerning one embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following, the outline of the present embodiment, the shape measuring device, and the shape measuring method will be described in this order.

1. Outline of the Present Embodiment FIG. 1 is a diagram schematically illustrating a shape measuring device for tire rubber material according to the present embodiment. And FIG. 2 is a figure which illustrates typically the shape measuring method of the rubber material for tires which concerns on this Embodiment. 2 is a movement trajectory of the pair of laser displacement sensors 22a and 22b and the color camera 20 that move to face both surfaces of the rubber material G for tire.

  As shown in FIG. 1, a tire shape measuring apparatus for tire material includes a moving device including a pair of linear rails 10 a and 10 b, a color camera 20, a pair of upper and lower laser displacement sensors 22 a and 22 b, and an encoder 18. , Provided with a measuring table and a computing unit (not shown).

  The present embodiment is characterized in that the color camera 20 is used to automatically detect the specific point to which the mark 30 is attached. Thus, by automatically detecting a specific point, the measurement position is not shifted, and a highly reproducible measurement result can be easily obtained regardless of the skill level of the operator.

  In the present embodiment, the color motor 20 and the pair of upper and lower laser displacement sensors 22a and 22b are moved and stopped on the pair of linear rails 10a and 10b by using the drive motor 16. There are features. Thus, by controlling the movement and stop of the color camera 20 and the pair of upper and lower laser displacement sensors 22a and 22b using the drive motor, the measurement position is not displaced due to the manual operation of the operator. In addition to being able to easily obtain highly reproducible measurement results, the measurement time can be shortened.

2. Equipment for measuring the shape of rubber materials for tires

(1) Laser displacement sensor The pair of upper and lower laser displacement sensors 22a and 22b are optical sensors, and are arranged on the sliders 12 and 14 so as to be opposed to the front side and the back side of the tire rubber material G. It is installed. The laser displacement sensors 22a and 22b receive the reflected light by irradiating the tire rubber material G with the laser light L. As a result, the distance between the laser displacement sensor 22a and the front surface of the tire rubber material G and the distance between the laser displacement sensor 22b and the rear surface of the tire rubber material G are known, and signals indicating the two obtained distances are calculated. Is output to the container. Then, in the arithmetic unit, the thickness of the rubber material G for the tire is calculated by subtracting the sum of the two distances obtained above from the distance between the pair of laser displacement sensors 22a and 22b kept constant. Is done.

  The separation distance between the laser displacement sensors 22a and 22b is appropriately set according to the size of the tire rubber material G and the like. Similarly, the maximum movable distance of the color camera 20 and the laser displacement sensors 22a and 22b in the linear rails 10a and 10b is also set as appropriate according to the size of the tire rubber material G and the like.

  And as a specific laser displacement sensor used in this Embodiment, the LK-G spot diameter type by Keyence Corporation etc. can be mentioned, for example.

(2) Color Camera In the present embodiment, as described above, the camera, which also uses the color camera 20, as a member for automatically detecting the mark 30 attached to the tire rubber material G. There is a feature.

  The present inventor has come to consider using a camera as a member for automatically detecting the mark 30, and initially considered a monochrome camera. However, when a black and white camera is used, for example, if the surface shape of the rubber material G for tires is undulated, the light reflected by the undulation is detected as the same white color as the mark 30, and the mark 30 is erroneously detected. As countermeasures, various countermeasures such as resolution adjustment have been attempted, but this has been insufficient to reduce erroneous mark detection.

  Therefore, the camera to be used was changed from a black and white camera to a color camera. As a result, when the color camera 20 is used, the ground color of the tire rubber material G and the mark 30 are immediately identified in order to distinguish the reflection of light due to the undulation of the surface shape as a color tone different from that of the mark. Thus, the color camera 20 in the present embodiment has been adopted.

  Note that, depending on the inclination of the surface shape of the tire rubber material G, it may be difficult to identify the mark 30. Therefore, the detection standard of the mark 30 in the color camera 20 is 2 according to the inclination of the tire rubber material G. It was found that it was preferable to set the stage.

  The color camera 20 is generally nearer to the laser displacement sensor on the side (usually the upper surface side) to which the mark 30 of the tire rubber material G is attached than the laser displacement sensor with respect to the moving direction. Arranged in the previous position. Thus, after the color camera 20 detects the mark 30, the laser displacement sensor can measure the thickness of the tire rubber material G.

  As a specific color camera used in the present embodiment, for example, 350,000 pixels of CV-5000 manufactured by Keyence Corporation can be cited.

  And it is preferable that the color of the mark 30 attached | subjected to the rubber material G for tires is a color which can be distinguished with respect to the color of the fabric of the rubber material for tires, and as a specific color, silver is preferable, for example, The mark 30 is attached to the tire rubber material G using a jig generally called a “silver pen”.

(3) Moving device The moving device is arranged on a pair of upper and lower linear rails 10a and 10b arranged to face each other along the width direction of the rubber material G for tire, and each linear rail is arranged on each linear rail 10a and 10b. A pair of upper and lower sliders 12 and 14 that can move freely along 10a and 10b are provided. The pair of upper and lower sliders 12 and 14 are configured to move in synchronization with each other when driven by a drive motor 16, and an encoder 18 is connected to the drive motor 16.

  In the upper slider 12, the color camera 20 and the upper displacement sensor 22a are disposed at a position ahead of the laser displacement sensor in the moving direction with a predetermined interval. On the other hand, a lower laser displacement sensor 22b is disposed on the lower slider 14 at a position facing the upper laser displacement sensor 22a.

  As described above, the color camera 20 and the upper laser displacement sensor 22a are fixedly disposed on the upper slider 12, and the lower laser displacement sensor 22b is disposed on the lower slider 14 so as to face the upper laser displacement sensor 22a. Therefore, when the upper and lower sliders 12 and 14 move while synchronizing the upper and lower linear rails 10a and 10b, the positional relationship between the laser displacement sensors 22a and 22b and the color camera 20 can be fixed.

  The moving device is preferably provided with an automatic return mechanism (not shown) for automatically returning the sliders 12 and 14 after the measurement to the initial standby position. As a result, the sliders 12 and 14 after completion of the measurement can be quickly returned to the initial standby position to prepare for the next measurement.

(4) Encoder The encoder 18 is connected to the drive motor 16 as described above, and calculates the moving distance of the pair of upper and lower sliders 12 and 14 based on the rotation amount (rotation speed and rotation angle) of the drive motor 16. Therefore, the position data of the laser displacement sensors 22a and 22b can be detected with high accuracy.

(5) Calculator The calculator calculates the width of the rubber material G for tires based on the position data of the laser displacement sensors 22a and 22b obtained from the encoder 18, and the thickness obtained from the laser displacement sensors 22a and 22b. A predetermined processing program or the like is stored so as to calculate the thickness of the tire rubber material G based on the data.

  Based on this processing program, when the mark 30 on the rubber material G for tire is detected by the color camera 20 with respect to the thickness, the tire is detected by the laser displacement sensors 22a and 22b at the position where the mark 30 is attached. A value obtained by measuring the distance to the front and back surfaces of the rubber material G for the tire and subtracting the total from the distance between the laser displacement sensors 22a and 22b is calculated as the thickness of the rubber material G for the tire.

  As for the width, the position at which the thickness of the rubber material G for the tire is first detected by the laser displacement sensors 22a and 22b is obtained from the position data of the encoder 18 and is set as the start position, while the tire is detected by the laser displacement sensors 22a and 22b. The position where the thickness of the rubber material G is no longer detected is obtained from the position data of the encoder 18 as the end position, and the distance between the obtained start end position and the end position is calculated as the width of the tire rubber material G. .

  As a specific computing unit used in this embodiment, for example, a personal computer can be cited.

  The calculated width and thickness of the tire rubber material G can then be displayed on an appropriate output device such as a display or a printer.

3. Method for Measuring Shape of Tire Rubber Material Next, a method for measuring the shape of the tire rubber material G using the tire rubber material shape measuring apparatus described above will be described.

  First, a tire rubber material G (see FIG. 2) with a mark 30 on the surface is placed on a measurement table (not shown) and the width direction of the tire rubber material G is parallel to the pair of upper and lower linear rails 10a and 10b. Place it so that At this time, the color of the mark 30 is preferably silver as described above.

  By pressing the measurement start button, the laser displacement sensors 22a and 22b are actuated to start the thickness measurement of the tire rubber material G. Specifically, the drive motor 16 synchronizes the pair of upper and lower sliders 12 and 14 on which the laser displacement sensors 22a and 22b and the color camera 20 are arranged, along the pair of upper and lower linear rails 10a and 10b. The movement is started in the direction of the movement track 40 shown in FIG. Then, by irradiating the tire rubber material G with laser light from the moving laser displacement sensors 22a and 22b and measuring the time until the reflected light is received, the front and back surfaces of the tire rubber material G are measured. Measure the distance.

  At this time, the moving speeds of the pair of upper and lower sliders 12 and 14, that is, the laser displacement sensors 22a and 22b and the color camera 20, can be detected stably and accurately by the color camera 20, and the laser displacement sensors 22a and 22b. Is a speed at which the thickness of the rubber material G for tire can be measured stably and accurately, specifically, 3.0 to 6.0 mm / s is preferable, and 4.3 mm / s is particularly preferable. If the moving speed of the color camera 20 is too slow, the measurement efficiency deteriorates. If the moving speed is too fast, the required accuracy cannot be satisfied.

  Then, the position where the laser displacement sensors 22a and 22b first detected the presence of the tire rubber material G is recognized as the start position in the width direction of the tire rubber material G, and the encoder 18 directs it to the calculator as start end position data. Output. Thereafter, the laser displacement sensors 22a and 22b measure the distance to the front and back surfaces of the tire rubber material G while moving in the width direction of the tire rubber material G along the moving track 40.

  When the moving color camera 20 detects the mark 30 formed on the surface of the tire rubber material G, the color camera 20 outputs a trigger signal to the calculator. When the trigger signal is input to the arithmetic unit, the thickness of the tire rubber material G is determined based on the distance to the front and back surfaces of the tire rubber material G measured by the laser displacement sensors 22a and 22b at the position of the mark 30. Calculated and recorded as thickness data of the tire rubber material G.

  Specifically, as shown in FIG. 1, when the color camera 20 is arranged at a predetermined interval in front of the laser displacement sensors 22a and 22b, the color camera 20 detects the mark 30 and then detects the predetermined value. When the laser displacement sensors 22a and 22b move by a distance corresponding to the distance and pass over the mark 30, the laser displacement sensors 22a and 22b measure the distances to the front and back surfaces of the tire rubber material G, and the results are Output to the calculator. Then, the computing unit calculates the thickness of the tire rubber material G based on the input distance measurement result, and records this as the thickness data of the tire rubber material G.

  At this time, since the mark 30 can be detected with high accuracy based on the detection criterion set in the color camera 20, as described above, highly reproducible thickness data can be obtained with certainty. Further, since the encoder 18 is connected to the drive motor 16, position data with high reproducibility can be obtained with certainty.

  When the moving laser displacement sensors 22a and 22b do not receive the reflected light from the surface of the tire rubber material G, the laser displacement sensors 22a and 22b have reached the end position of the tire rubber material G. Since this determination can be made, the end position data is output to the computing unit by the encoder 18 with the detection end position as the end.

  And based on each obtained data, the calculator calculates the width and thickness of the rubber material G for tire. Thus, the shape measurement of the rubber material G for tire is completed.

  After that, it is preferable that the pair of upper and lower laser displacement sensors 22a and 22b that have finished measuring the tire rubber material G are moved in the opposite directions and automatically returned to the initial standby position.

  As described above, according to the present embodiment, the mark is detected with high accuracy using the color camera, and the width and thickness of the rubber material for tire are automatically measured while moving the pair of upper and lower laser displacement sensors. Therefore, shape measurement with high reproducibility can be performed in a short time.

  As mentioned above, although this invention was demonstrated based on embodiment, this invention is not limited to said embodiment. Various modifications can be made to the above-described embodiment within the same and equivalent scope as the present invention.

10a Upper linear rail 10b Lower linear rail 12 Upper slider 14 Lower slider 16 Drive motor 18 Encoder 20 Color camera 22a Upper laser displacement sensor 22b Lower laser displacement sensor 30 Mark 40 Moving track G Tire rubber material L Laser light

Claims (13)

A shape measuring device for measuring the shape of a rubber material for tires,
A pair of upper and lower laser displacement sensors disposed opposite to both surfaces of the tire rubber material to measure the distance to each surface of the tire rubber material;
A color camera for detecting a mark on the tire rubber material;
A moving device that moves the pair of upper and lower laser displacement sensors and the color camera along the width direction of the rubber material for tires;
An encoder that measures the position of the pair of upper and lower laser displacement sensors that move; and
A shape measurement of a rubber material for a tire, comprising: a calculator that takes in data transmitted from the pair of upper and lower laser displacement sensors and the encoder and calculates a thickness and a width of the tire rubber material. apparatus. The moving device is a slider attached to each of two upper and lower linear rails;
The upper slider has the upper laser displacement sensor and the color camera arranged at predetermined intervals.
2. The tire rubber material shape measuring device according to claim 1, wherein the lower laser displacement sensor is disposed so that the lower laser displacement sensor faces the upper laser displacement sensor. 3.   The shape measuring device for a rubber material for a tire according to claim 2, wherein a slider attached to each of the two upper and lower linear rails is configured to move in synchronization by a drive motor. .   The shape of the rubber material for tire according to claim 2 or 3, wherein the moving device is provided with an automatic return mechanism for automatically returning the slider after completion of measurement to an initial standby position. measuring device.   5. The detection reference of the mark attached on the tire rubber material in the color camera is set in two stages according to the inclination of the tire rubber material. The shape measuring apparatus of the rubber material for tires of any one of Claims 1. A method for measuring the shape of a rubber material for a tire, which measures the shape of the rubber material for a tire using the shape measuring device for a rubber material for a tire according to any one of claims 1 to 5,
The pair of upper and lower laser displacement sensors and the color camera are moved along the width direction of the tire rubber material using the moving device,
The position at which the thickness of the rubber material for the tire is first detected by the pair of upper and lower laser displacement sensors is obtained from the data of the encoder as the start position, while the position of the rubber material for the tire is determined by the pair of upper and lower laser displacement sensors. The position where thickness is no longer detected is determined from the data of the encoder as the end position, the distance between the start end position and the end position is calculated as the width of the tire rubber material,
After the color camera detects the mark attached on the tire rubber material, the thickness at the position of the mark attached on the tire rubber material is measured by the pair of upper and lower laser displacement sensors, and the tire A method for measuring the shape of a rubber material for tires, wherein the thickness is calculated as the thickness of the rubber material for tires. A method for measuring the shape of a rubber material for a tire, which measures the shape of the rubber material for a tire using the shape measuring device for a rubber material for a tire according to any one of claims 1 to 5,
Moving the pair of upper and lower laser displacement sensors and the color camera along the width direction of the tire rubber material using the moving device; and
Obtaining a position at which the thickness of the rubber material for the tire is first detected by the pair of upper and lower laser displacement sensors to be moved from the data of the encoder and setting it as a start position of the rubber material for the tire;
Detecting the mark on the tire rubber material by the moving color camera;
Measuring the thickness at the position of the detected mark with the pair of upper and lower laser displacement sensors, calculating the thickness of the tire rubber material, and measuring the thickness of the tire rubber material;
Obtaining the position where the thickness of the rubber material for tire is no longer detected by the pair of upper and lower laser displacement sensors moving from the data of the encoder and setting it as the end position of the tire rubber material;
And a step of calculating the distance between the obtained start end position and the end position as the width of the tire rubber material and measuring the width of the tire rubber material. Measuring method of rubber material   The measurement of the thickness at the position of the mark attached on the tire rubber material is performed by outputting a trigger signal from the color camera that has detected the mark attached on the tire rubber material. The shape measuring method of the rubber material for tires according to claim 6 or 7.   9. After the measurement of the shape of the rubber material for tire is completed, the pair of upper and lower laser displacement sensors and the color camera are returned to a standby position by the automatic return mechanism. The shape measuring method of the rubber material for tires according to any one of the above.   The color of the mark attached | subjected on the said rubber material for tires is a color which can be distinguished with respect to the color of the cloth | dough of the said rubber material for tires, The any one of Claim 6 thru | or 9 characterized by the above-mentioned. The shape measuring method of the rubber material for tires as described in 2.   The shape measurement method of the rubber material for tires according to any one of claims 6 to 10, wherein the color of the mark given on the rubber material for tires is silver.   The tire rubber according to any one of claims 6 to 11, wherein a moving speed of the pair of upper and lower laser displacement sensors and the color camera is 3.0 to 6.0 mm / s. Material shape measurement method.   The tire rubber material shape measuring method according to any one of claims 6 to 12, wherein the tire rubber material to be measured is a tread or a sidewall.

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