JP2013190215A - Measuring device for profile of unvulcanized tire and measuring method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a measuring device for a profile of an unvulcanized tire which is compact and in which a tire manufacturing line can be made online, and a measuring method.SOLUTION: A measuring device 1 for a profile of an unvulcanized tire T is configured to measure a profile shape of the unvulcanized tire T and comprises a displacement sensor 8 which measures a distance to the unvulcanized tire T, a servo motor 4 which turns and moves the displacement sensor 8 in an arcuate shape with a predetermined diameter horizontally to the unvulcanized tire T which is positioned in a perpendicular state, an encoder 2 which measures a turning angle of the displacement sensor 8 synchronously with the servo motor 4, and an arithmetic processing unit which calculates the profile shape of the unvulcanized tire T. The arithmetic processing unit performs arithmetic processing on the basis of a distance A between a center C1 of the unvulcanized tire and a turning center C2 of the displacement sensor, a turning radius B of the displacement sensor, measured distance data C by the displacement sensor, and angle data by the encoder 2.

Description

  The present invention relates to a measurement device and a measurement method for a profile of an unvulcanized tire.

  The product tire is manufactured by vulcanizing and molding an unvulcanized tire formed by bonding various tire materials. At this time, if the bonding of the tire material in the unvulcanized tire is not appropriate, there is a risk that quality defects will occur in the product tire after vulcanization.

  For this reason, conventionally, prior to vulcanization, it has been confirmed whether or not each tire material is properly bonded to an unvulcanized tire. Specifically, this confirmation operation is performed by measuring the outer shape of the tire using a profile measuring device (hereinafter also simply referred to as “measuring device”) (for example, Patent Document 1).

  3 and 4 schematically show the structure of a conventional profile measuring apparatus. 3 is a front view, and FIG. 4 is a left side view. As shown in FIGS. 3 and 4, this measuring apparatus includes a motor 51 having a drive shaft 52 extending in the horizontal direction, an L-shaped arm member 54 fixed to the drive shaft 52, and a distal end portion of the arm member 54. A displacement sensor 56 such as an attached laser sensor is provided.

  First, the unvulcanized tire T placed on the carriage 60 in a vertically placed state is fixed on the rotation center axis of the unvulcanized tire T by a pair of support columns 62 and 63 erected on the carriage 60. Thereafter, the cart 60 is installed so that the rotation center of the unvulcanized tire T is located immediately below the displacement sensor 56.

  Next, the motor 51 is driven to rotate the drive shaft 52. The arm member 54 rotates in response to the rotation of the drive shaft 52, and the displacement sensor 56 attached to the tip portion turns in the tire width direction of the unvulcanized tire T as shown in FIG. During this turning movement, the displacement sensor 56 spot-irradiates the surface of the tread portion and the side portion of the unvulcanized tire T with laser light or the like, and measures the distance to the unvulcanized tire T. Then, while rotating the unvulcanized tire T little by little, the above measurement is performed over the entire surface of the unvulcanized tire, and the profile of the entire surface of the unvulcanized tire T is determined from the obtained measurement data. .

  As a result of the profile measurement, the unvulcanized tire T determined that the tire material is properly bonded is removed from the carriage 60 and then sent to the vulcanization process.

JP 2006-192895 A

  However, as shown in FIG. 3, the conventional measuring apparatus as described above generally has a large size because the motor 51 is placed horizontally and has a drive shaft 52 extending in the horizontal direction. At that time, a large installation area is required.

  Further, in order for the displacement sensor 56 to sufficiently measure the surface of the tread portion and the side portion of the unvulcanized tire T, it is necessary to make the rotation center of the arm member 54 lower than the head of the unvulcanized tire T. . For this reason, the unvulcanized tire T cannot be transferred in the direction of the displacement sensor 56, the direction in which the carriage 60 is installed is limited, and the profile cannot be measured in the production line (online).

  Therefore, in view of the above, an object of the present invention is to provide a measurement apparatus and a measurement method for a profile of an unvulcanized tire that is compact and capable of bringing a tire production line online.

The invention described in claim 1
An apparatus for measuring a profile of an unvulcanized tire for measuring a profile shape of an unvulcanized tire,
A displacement sensor for measuring the distance from the unvulcanized tire;
A servomotor that pivots the displacement sensor in a circular shape with a predetermined diameter in a horizontal direction with respect to the unvulcanized tire positioned in a vertical state;
An encoder that measures a turning angle of the displacement sensor in synchronization with the servo motor;
An arithmetic processing unit that calculates the profile shape of the unvulcanized tire,
The arithmetic processing unit is
An arithmetic processing unit that performs arithmetic processing based on a distance between a center of the unvulcanized tire and a turning center of the displacement sensor, a turning radius of the displacement sensor, measurement distance data by the displacement sensor, and angle data by the encoder. An apparatus for measuring a profile of an unvulcanized tire.

The invention described in claim 2
The arithmetic processing unit is
When the center of the unvulcanized tire is the origin, the rotational axis direction of the unvulcanized tire is the X axis, and the radial center line direction of the unvulcanized tire is the Y axis,
The apparatus for measuring a profile of an unvulcanized tire according to claim 1, wherein the apparatus is an arithmetic processing unit that uses (X, Y) calculated by the following expression to obtain a profile shape of the unvulcanized tire. It is.
X = (B−C) × sin {(θ / 360) × 2π}
Y = A + (BC) × cos {(θ / 360) × 2π}
A: Distance between the center of the unvulcanized tire and the turning center of the displacement sensor
B: Turning radius of the displacement sensor
C: Measurement distance data by displacement sensor
θ: Angle data by encoder

The invention according to claim 3
An unvulcanized tire profile measuring method for measuring a profile shape of the unvulcanized tire using the uncured tire profile measuring device according to claim 1 or 2,
The distance between the center of the unvulcanized tire and the turning center of the displacement sensor, and the turning radius of the displacement sensor are fixed,
Positioning the unvulcanized tire in a vertical state;
The displacement sensor is pivoted in a circular shape with a predetermined diameter in a horizontal direction with respect to the unvulcanized tire, and measures the distance from the unvulcanized tire,
Obtain angle data by the encoder,
An arithmetic process is performed based on the distance between the center of the unvulcanized tire and the turning center of the displacement sensor, the turning radius of the displacement sensor, the measured distance data by the displacement sensor, and the angle data by the encoder, and A method for measuring a profile of an unvulcanized tire, characterized in that a profile shape of the cured tire is obtained.

The invention according to claim 4
The arithmetic processing is
When the center of the unvulcanized tire is the origin, the rotational axis direction of the unvulcanized tire is the X axis, and the radial center line direction of the unvulcanized tire is the Y axis,
4. The method for measuring a profile of an unvulcanized tire according to claim 3, wherein the calculation processing is performed to obtain the profile shape of the unvulcanized tire using (X, Y) calculated by the following equation. is there.
X = (B−C) × sin {(θ / 360) × 2π}
Y = A + (BC) × cos {(θ / 360) × 2π}
A: Distance between the center of the unvulcanized tire and the turning center of the displacement sensor
B: Turning radius of the displacement sensor
C: Measurement distance data by displacement sensor
θ: Angle data by encoder

  ADVANTAGE OF THE INVENTION According to this invention, the measuring apparatus and measuring method of the profile of the unvulcanized tire which are compact and can be on-line of a tire production line can be provided.

1 is a front view schematically showing the structure of a profile measuring device for an unvulcanized tire according to an embodiment of the present invention. It is a top view which shows typically the structure of the measuring apparatus of the profile of the unvulcanized tire of one embodiment of this invention. It is a front view which shows typically the structure of the measuring apparatus of the profile of the conventional unvulcanized tire. It is a left view which shows typically the structure of the conventional measuring apparatus of the profile of an unvulcanized tire.

  Hereinafter, the present invention will be specifically described with reference to the drawings.

1. Configuration of Uncured Tire Profile Measuring Device FIG. 1 is a front view schematically showing the structure of an unvulcanized tire profile measuring device according to the present embodiment. FIG. 2 is a plan view schematically showing the structure of the profile measuring device for an unvulcanized tire according to the present embodiment.

  As shown in FIG. 1, a profile measuring apparatus 1 according to the present embodiment includes an encoder 2, a servo motor 4, an arm member 6, a displacement sensor 8, and an arithmetic processing unit (CPU) (not shown). ing.

  The servo motor 4 is placed on the base plate 10. The first rotation drive shaft 40 of the servo motor 4 is connected to the second rotation drive shaft 20 via a gear mechanism (not shown). Accordingly, the driving force of the servo motor 4 is transmitted to the second rotary drive shaft 20 via the gear mechanism. The reduction ratio of the gear mechanism is set so that the rotation speed of the second rotation drive shaft 20 is rotationally driven at a rotation speed suitable for an arcuate turning operation of the displacement sensor 8 described later.

  The encoder 2 is attached to the second rotary drive shaft 20 and is synchronized with the servo motor 4. As the encoder 2, for example, a rotary encoder that measures a rotation amount, a rotation angle, and a rotation position is used. The encoder 2 generates count pulses (encoder pulses) at constant angular intervals by rotating in synchronization with the servo motor 4. The count pulse is appropriately selected in consideration of how long the moving distance of one pulse is. In the present embodiment, the encoder 2 is separated from the servo motor 4, but the servo motor 4 with the encoder 2 built therein may be used.

  The arm member 6 includes a horizontal arm portion 6 a that is parallel to the base plate 10 and a vertical arm portion 6 b that is orthogonal to the base plate 10. One end of the horizontal arm 6a is joined to the tip of the second rotary drive shaft 20, and the other end is joined to one end of the vertical arm 6b. A displacement sensor 8 is attached to the other end of the vertical arm 6b.

  The displacement sensor 8 is initially located at a height position substantially equal to the center axis C1 of the unvulcanized tire T.

  The specific displacement sensor 8 is appropriately selected in consideration of measurement accuracy and the like. For example, in order to obtain a measurement accuracy of 0.1 mm, it is preferable to use a laser sensor.

2. Next, a method for measuring a profile of an unvulcanized tire using the profile measuring apparatus 1 will be described.

  When the profile of the unvulcanized tire is measured using the profile measuring device 1, the unvulcanized tire T is rotatably supported. The unvulcanized tire T is set at a position in the vicinity of the profile measuring device 1 so that the laser beam of the displacement sensor 8 is applied to the side portion.

  Next, when the servo motor 4 is driven, the second rotation drive shaft 20 rotates by a predetermined angle according to the rotation of the servo motor 4. As a result, the displacement sensor 8 attached to the distal end portion of the arm member 6 turns in the width direction of the unvulcanized tire T in an arc shape with a radius corresponding to the length of the horizontal arm portion 6a. The tread portion and the side portion of the sulfur tire T are spot-irradiated.

  On the other hand, the encoder 2 attached to the second rotary drive shaft 20 rotates in synchronization with the servo motor 4 to generate count pulses at regular angular intervals. The displacement sensor 8 measures the distance from the unvulcanized tire T at every fixed angle by using the count pulse generated by the encoder 2 at a fixed angle interval as a take-in trigger.

  In the above measurement, the unvulcanized tire T is measured so that the distance A between the center C1 of the unvulcanized tire T and the turning center C2 of the displacement sensor 8 and the turning radius B of the displacement sensor 8 are always constant. This is done with a fixed position.

  Next, an arithmetic processing unit (CPU) (not shown) measures measurement distance data with the unvulcanized tire T measured by the displacement sensor 8, angle data acquired by the encoder 2, and the displacement sensor 8 and the unvulcanized tire. Calculation processing is performed based on the positional relationship data with T, and the profile shape of the surface of the unvulcanized tire T is derived.

Specifically, the profile shape of the unvulcanized tire T has the origin O as the center of the unvulcanized tire, the X axis is the rotational axis direction of the unvulcanized tire, and the center line direction of the radial direction of the unvulcanized tire is When the angle data acquired by the encoder 2 is θ and the angle data acquired by the encoder 2 is θ, the profile (X, Y) of the measurement location is the rotation center axis C1 of the unvulcanized tire T and the rotation center axis C2 of the displacement sensor 8. , The turning radius B of the displacement sensor 8 and the measured distance data C measured by the displacement sensor are calculated by the following relational expression.
X = (B−C) × sin {(θ / 360) × 2π}
Y = A + (BC) × cos {(θ / 360) × 2π}

  When measuring the profile of the entire surface of the unvulcanized tire T, the measurement is performed over the entire surface of the unvulcanized tire T while rotating the unvulcanized tire T. The measurement data of the profile of the unvulcanized tire T obtained in this way is stored in the memory of the arithmetic processing unit (CPU) as tire guarantee data.

  As described above, in the present embodiment, the profile is measured by turning the displacement sensor in the horizontal direction with respect to the unvulcanized tire T positioned in the vertical direction. It can be easily made compact. Furthermore, since the unvulcanized tire T can be transferred in the direction of the displacement sensor 56, the direction in which the carriage 60 is installed is not limited, and the measuring device can be easily arranged in the production line. Profile measurement can be performed online.

  In measuring the profile, as described above, the distance A between the center of the unvulcanized tire and the turning center of the displacement sensor and the turning radius B of the displacement sensor are always kept constant. Therefore, simply adding the angle data θ obtained by the encoder 2 to the measurement distance data C obtained by measuring the circumference of the unvulcanized tire T in an arc shape using the displacement sensor 8 can be easily performed. The profile of the vulcanized tire T can be calculated.

  And by measuring the profile of the unvulcanized tire T, by registering the appropriate profile of each size, it is possible to easily confirm whether or not the proper dimension has been formed by the measurement for each tire formation. it can.

  Furthermore, by applying the present invention, it is also possible to confirm the profile of the raw cover before the vulcanizer is introduced in the core molding.

  While the present invention has been described based on the embodiments, the present invention is not limited to the above embodiments. Various modifications can be made to the above-described embodiments within the same and equivalent scope as the present invention. The present invention is not limited to unvulcanized tires, and can be applied as long as the center can be fixed.

DESCRIPTION OF SYMBOLS 1 Profile measuring apparatus of unvulcanized tire 2 Encoder 4 Servo motor 6, 54 Arm member 6a Horizontal arm part 6b Vertical arm part 8, 56 Displacement sensor 10 Base plate 20 Second rotation drive shaft 40 First rotation drive shaft 51 Motor 52 Drive shaft 60 Bogie 62, 63 Prop C1 Center of unvulcanized tire C2 Center of rotation of displacement sensor A Distance between center of unvulcanized tire and center of rotation of displacement sensor B Bending radius of displacement sensor C Distance measured by displacement sensor Data O Origin T Unvulcanized tire θ Angle data by encoder

Claims (4)

An apparatus for measuring a profile of an unvulcanized tire for measuring a profile shape of an unvulcanized tire,
A displacement sensor for measuring the distance from the unvulcanized tire;
A servomotor that pivots the displacement sensor in a circular shape with a predetermined diameter in a horizontal direction with respect to the unvulcanized tire positioned in a vertical state;
An encoder that measures a turning angle of the displacement sensor in synchronization with the servo motor;
An arithmetic processing unit that calculates the profile shape of the unvulcanized tire,
The arithmetic processing unit is
An arithmetic processing unit that performs arithmetic processing based on a distance between a center of the unvulcanized tire and a turning center of the displacement sensor, a turning radius of the displacement sensor, measurement distance data by the displacement sensor, and angle data by the encoder. An apparatus for measuring a profile of an unvulcanized tire. The arithmetic processing unit is
When the center of the unvulcanized tire is the origin, the rotational axis direction of the unvulcanized tire is the X axis, and the radial center line direction of the unvulcanized tire is the Y axis,
The apparatus for measuring a profile of an unvulcanized tire according to claim 1, wherein the apparatus is an arithmetic processing unit that uses (X, Y) calculated by the following expression to obtain a profile shape of the unvulcanized tire. .
X = (B−C) × sin {(θ / 360) × 2π}
Y = A + (BC) × cos {(θ / 360) × 2π}
A: Distance between the center of the unvulcanized tire and the turning center of the displacement sensor
B: Turning radius of the displacement sensor
C: Measurement distance data by displacement sensor
θ: Angle data by encoder An unvulcanized tire profile measuring method for measuring a profile shape of the unvulcanized tire using the uncured tire profile measuring device according to claim 1 or 2,
The distance between the center of the unvulcanized tire and the turning center of the displacement sensor, and the turning radius of the displacement sensor are fixed,
Positioning the unvulcanized tire in a vertical state;
The displacement sensor is pivoted in a circular shape with a predetermined diameter in a horizontal direction with respect to the unvulcanized tire, and measures the distance from the unvulcanized tire,
Obtain angle data by the encoder,
An arithmetic process is performed based on the distance between the center of the unvulcanized tire and the turning center of the displacement sensor, the turning radius of the displacement sensor, the measured distance data by the displacement sensor, and the angle data by the encoder. A method for measuring a profile of an unvulcanized tire, wherein a profile shape of the cured tire is obtained. The arithmetic processing is
When the center of the unvulcanized tire is the origin, the rotational axis direction of the unvulcanized tire is the X axis, and the radial center line direction of the unvulcanized tire is the Y axis,
4. The method for measuring a profile of an unvulcanized tire according to claim 3, wherein the calculation processing is performed to obtain the profile shape of the unvulcanized tire using (X, Y) calculated by the following equation.
X = (B−C) × sin {(θ / 360) × 2π}
Y = A + (BC) × cos {(θ / 360) × 2π}
A: Distance between the center of the unvulcanized tire and the turning center of the displacement sensor
B: Turning radius of the displacement sensor
C: Measurement distance data by displacement sensor
θ: Angle data by encoder

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