JP2015024517A - End cord detection method and device for rubber cord composite material, and lug rubber removal method and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect a position of a cord on an endmost position in a width direction of a rubber cord composite material precisely for removing a lug rubber of the rubber cord composite material.SOLUTION: A width direction end region of a rubber cord composite material 4 is measured along the width direction by two-dimensional displacement sensors 6, 7, and waveform data corresponding to a surface shape of the rubber cord composite material 4 in the width direction is acquired. A peak position and height of a mountain of the waveform are determined from the waveform data, and the peak of the mountain where there is no adjacent peak mountain in a predetermined range is detected as a peak of the cord on an endmost in the width direction. Based on the waveform data, wave height of the mountain peak of the waveform and a village peak adjacent to the mountain peak is determined. The peak that the wave height exceeds a predetermined range is detected as a peak of the cord on the endmost in the width direction.

Description

  The present invention relates to a method and an apparatus for detecting an end code of a rubber / cord composite material, and an ear rubber removing method and apparatus.

  For the carcass and belt of a tire, a rubber / cord composite material in which a reinforcing cord is embedded in a rubber sheet is used. This rubber-cord composite material supplies a plurality of organic fiber or steel cords arranged in parallel at approximately equal intervals to a calender device continuously in the longitudinal direction thereof, and a calender roll provided in the calender device. Manufactured by coating rubber around a plurality of cords. The rubber-cord composite material immediately after being covered with rubber by the calender device has a portion made only of rubber called ear rubber at the end in the width direction. This ear rubber is unnecessary for rubber-cord composite materials using tire members such as carcass and belt, so the ear rubber is continuously cut with a cutter provided on the downstream side of the calendar device. Yes.

  There is a method in which the position of the cutter for cutting the ear rubber is cut with reference to the position of the endmost cord in the width direction of the rubber-cord composite material. In this method, it is necessary to detect the position of the endmost cord in the width direction of the rubber-cord composite material with high accuracy.

  A device that detects the position of the end of the rubber-cord composite material in the width direction is equipped with a laser thickness meter that can reciprocate in the width direction of the rubber-cord composite material. Describes an apparatus that calculates the outermost code position by a calculation means based on the distribution of thickness in the width direction obtained in the above (Patent Document 1).

JP 7-195571 A

  Since the apparatus described in Patent Document 1 reciprocates the laser thickness gauge in the width direction of the rubber / cord composite material, it takes a certain amount of time to obtain the thickness distribution in the width direction. When the width variation or meandering of the material occurs, it may be difficult to handle the width variation or meandering with high accuracy.

  The present invention has been made in order to advantageously solve the above problem, and an end portion of a rubber-cord composite material capable of detecting with high accuracy the position of the endmost cord in the width direction of the rubber-cord composite material. It is an object of the present invention to provide a code detection method and apparatus together with an ear rubber removal method and apparatus using the detection method and apparatus.

The rubber cord composite material end code detection method according to the present invention includes a rubber cord composite material in which a plurality of cords arranged in parallel are embedded along the longitudinal direction of the rubber sheet. A method of detecting a position during movement, wherein a two-dimensional displacement sensor measures a width-direction end region of a rubber-cord composite material along the width direction, and a surface shape in the width direction of the rubber-cord composite material Is obtained from this waveform data, and the position and height of the peak of the peak of the waveform are obtained, and the peak of the peak having no adjacent peak in the predetermined range is detected as the peak of the code at the extreme end in the width direction. In addition, from this waveform data, the peak height of the peak of the waveform and the peak of the valley adjacent to the peak of the peak are obtained, and the peak whose peak exceeds a predetermined range is detected as the peak of the code at the extreme end in the width direction. Special To. As described above, in the present invention, the code at the extreme end in the width direction is detected from the waveform data by using two types of detection methods.
In the rubber cord composite material end code detection method of the present invention, the two-dimensional displacement sensor is provided on the downstream side of the calendar device for producing the rubber cord composite material, so that the rubber cord manufactured by the calendar device is provided. The end code detection method is applied to remove the ear rubber of the composite material.

  Another aspect of the present invention is a method for removing an ear rubber from a rubber / cord composite, wherein the rubber / cord composite is based on the position of the endmost cord in the width direction of the rubber / cord composite detected by the above method. Remove the ear rubber. In the ear rubber removal method of the rubber-cord composite material according to the present invention, the conventional rubber in which the outermost cord is cut by cutting the outermost cord in the width direction so as to remain in the rubber-cord composite material.・ Reduce the amount of waste compared to the method of manufacturing cord composite materials.

  Another aspect of the present invention is an end code detecting device for a rubber / cord composite material, which is a two-dimensional displacement sensor and a waveform corresponding to the surface shape in the width direction of the rubber / cord composite material from the two-dimensional displacement sensor. A data signal is input, and the position and height of the peak of the waveform are obtained from this waveform data, and the peak of the peak that does not have an adjacent peak in the predetermined range is detected as the peak of the code at the extreme end in the width direction. From the waveform data, a wave height between the peak of the peak of the waveform and the peak of the valley adjacent to the peak of the peak is obtained, and a calculation unit that detects a peak whose peak exceeds a predetermined range as the peak of the code at the extreme end in the width direction And an arithmetic unit.

  Another aspect of the present invention is an ear rubber removing device for a rubber / cord composite material, wherein the rubber / cord composite material end cord detecting device detects an end cord in the width direction of the rubber / cord composite material. And an excision device for excising the ear rubber on the basis of the position of the end cord in the width direction of the rubber-cord composite material based on the peak position data.

  According to the present invention, the waveform data corresponding to the surface shape in the width direction of the rubber-cord composite material is obtained by the two-dimensional displacement sensor, and one of the codes in the width direction is detected from this waveform data. From this waveform data, the peak position and height of the peak of the waveform are obtained, and the peak of the peak that does not have an adjacent peak in the specified range is detected as the peak of the code at the extreme end in the width direction. Since the wave height between the peak of the peak of the waveform and the peak of the valley adjacent to the peak of the peak is obtained, and the peak whose wave height exceeds a predetermined range is detected as the peak of the cord in the width direction, the rubber cord composite The position of the cord at the end in the width direction of the material can be detected with high accuracy.

It is a schematic diagram which shows the relationship between a rubber cord composite material and a waveform. It is a schematic diagram of an ear rubber removing device for a rubber-cord composite material. It is a flowchart of the detection method of this invention. It is explanatory drawing of the detection method of this invention.

Hereinafter, embodiments of the present invention will be described more specifically with reference to the drawings.
In the rubber-cord composite material ear rubber removing method and apparatus according to the present embodiment, the surface shape (contour) of the surface represented by a cross section perpendicular to the longitudinal direction of the cord in the end region in the width direction of the rubber-cord composite material is obtained. Measurement is performed using a two-dimensional displacement sensor (specifically, a laser displacement meter), the surface shape is obtained as waveform data, and the ear rubber is removed based on the waveform data.

  As shown in FIG. 1, in the width direction of the rubber-cord composite material 4, the portion where the cord 1 is embedded is thicker, while the portion where the cord 1 is not embedded is The composite material 4 is thin. Therefore, when the distance from the sensor to the rubber / cord composite 4 is measured by a two-dimensional displacement sensor such as a laser displacement meter, the distance of the portion where the cord 1 is embedded is short, and the portion where the cord 1 is not embedded is short. The distance gets longer. From this distance, the unevenness of the surface in the width direction of the rubber-cord composite material 4 is expressed as a waveform w having an amplitude. Using the waveform data having this amplitude, an abnormality in which the cutter 5 cuts in the portion where the cord 1 is embedded or the cord 1 is exposed is detected.

  FIG. 2 is a schematic view of an embodiment of the ear rubber removing device of the present invention provided near the calendar device. In FIG. 2, a plurality of codes 1 move so as to pass between calendar rolls 2 of the calendar device. The calendar roll includes a plurality of rolls 2a, 2b, 2c and 2d. By supplying the rubber 3 between the rolls 2a and 2b and between the rolls 2c and 2d, rubber having a predetermined thickness is formed on the peripheral surfaces of the rolls 2b and 2c. In this state, by passing a plurality of cords 1 through the roll gaps of the rolls 2b and 2c, the rubber on the rolls 2b and 2c is pressure-bonded so as to sandwich the plurality of cords 1, and the rubber-cord composite Material 4 is produced.

  On the downstream side of the calender roll 2, a cutter 5 for cutting the ear rubber is provided in contact with the vicinity of both ends of the rubber / cord composite material 4. As the cutter 5, for example, a ring-shaped rotary blade can be used. The cutter 5 is attached so as to be movable in the width direction of the rubber-cord composite material 4 and is controlled at a predetermined distance from the endmost cord in the width direction of the rubber-cord composite material 4 by a control method described later. Control is performed to remove the ear rubber of the composite material 4.

In the vicinity of the cutter 5 provided at each end of the rubber / cord composite material 4, in the illustrated example, a two-dimensional displacement sensor 6 is disposed immediately before the cutter 5 along the moving direction of the rubber / cord composite material 4. Immediately after that, a two-dimensional displacement sensor 7 is provided. By providing the two-dimensional displacement sensors 6 and 7 on the downstream side of the calendar device 2, the two-dimensional displacement sensor 6, 7 is used for excision of the ear rubber of the rubber-cord composite material 4 manufactured by the calendar device 2. 7 can be utilized.
The two-dimensional displacement sensor 6 provided on the upstream side is provided so that it can move integrally with the cutter 5 by being attached to the same fixing member as the cutter 5, for example. The two-dimensional displacement sensor 7 provided on the downstream side is fixed independently of the cutter 5. The two-dimensional displacement sensors 6 and 7 are provided so that the surface shape in the width direction of the rubber-cord composite material 4 can be measured in a predetermined range without contact. The two-dimensional displacement sensors 6 and 7 can specifically use a two-dimensional laser displacement meter, and irradiate laser light to a predetermined range of the measurement object, specifically, for example, a range of about 20 mm. What can measure the surface shape is used. Since the rubber / cord composite material 4 is moving at a speed of about 50 m / min on the downstream side of the calendar device, it is necessary to repeatedly measure the surface shape of the rubber / cord composite material 4 moving at this speed in a short time. A dimensional laser displacement meter is preferred.

The two-dimensional displacement sensors 6 and 7 are connected to the control device 8, and a waveform data signal is input to the control device.
The control device 8 includes an input unit 8a, a calculation unit 8b, a storage unit 8c, and an output unit 8d. The waveform signal output from the two-dimensional displacement sensors 6 and 7 is input to the input unit 8a. The calculation unit 8b performs calculation for detecting the endmost cord in the width direction of the rubber / cord composite material 4 from the waveform signal input to the input unit. Details of this calculation will be described later. The storage unit 8c is a waveform peak data used for calculation in the calculation unit 8b, intermediate data calculated in the calculation process, or the end in the width direction of the rubber cord composite material 4 as a result of the calculation. The position data of the code is stored.
The output unit 8d outputs the position data of the endmost cord in the width direction of the rubber / cord composite material 4 as a result of the calculation in the calculation unit 8b to the monitor 9 or the like.

  The calculation for detecting the endmost cord in the width direction in the rubber-cord composite material 4 performed by the calculation unit 8b of the control device 8 will be described with reference to the flowchart shown in FIG. 3 and the waveform schematic diagram shown in FIG. In addition, since the calculation of detection using the two-dimensional displacement sensor 6 and the calculation of detection using the two-dimensional displacement sensor 7 can be made the same, they will be described together below.

Waveform data is acquired from the input unit 8a (step S1), and noise removal processing is performed on the waveform data (step S2). From the waveform data after performing the noise removal processing, the peak positions p ₁ , p ₂ ,... _{Pn −} 1, pn of the waveform as shown in FIG. (Step S3). Next, the height of the peak of the waveform peak is obtained (step S4). The processing in steps S1 to S4 is preprocessing for detecting an end cord of the rubber-cord composite material 4.

  Next, in the example of the flowchart shown in FIG. 3, as the first detection, that is, “detection A”, for each peak of the peak of the waveform as shown in FIG. A calculation is performed to check whether or not there is an adjacent peak in L, and a peak having no adjacent peak is detected as the peak of the endmost code in the width direction (step S5).

  Next, as the second detection, that is, “detection B”, for each peak of the peak of the waveform, as shown in FIG. 4C, the peak of the peak of the waveform and the peak of the valley adjacent to the peak of the peak The peak of the wave height H exceeding a predetermined range is detected as the peak of the code at the extreme end in the width direction (step S6).

  The peak position of the endmost code in the width direction detected by detection A is compared with the peak position of the endmost code in the width direction detected by detection B (step S7). When the compared peak positions match, the matched peak position is regarded as the endmost code in the width direction. The peak of the code in the end in the width direction and the position of the code center are stored (step S8), and the code in the end in the width direction is detected (step S9).

  If the peak positions compared in step S7 do not match, the peak position of the outermost code in the width direction obtained by the previous detection, the peak position of the outermost code in the width direction detected by detection A, and the detection B Each of the peak positions of the code at the end in the width direction detected in (1) is compared (step S10). Then, the peak position of the end code in the width direction that coincides with the end code in the width direction obtained by the previous detection is regarded as the correct end code in the width direction (step S11). The correct peak in the width direction end and the position of the code center are stored (step S8), and the end code in the width direction is detected (step S9).

  In the present invention, the two methods of detection A and detection B are used in combination for detection of the code at the end in the width direction. With only one method, for example, when a foreign matter adheres to the surface in the vicinity of the end in the width direction of the rubber-cord composite material 4, the code at the extreme end in the width direction may be erroneously detected. By using together, it is possible to avoid erroneous detection as much as possible, and to detect the endmost code in the width direction with high accuracy. Further, the detection of the endmost cord in the width direction is repeatedly detected for a short time, for example, every 20 ms in accordance with the movement of the rubber / cord composite material 4, thereby causing fluctuations in the width and meandering of the rubber / cord composite material 4. Even in this case, it is possible to detect the endmost code in the width direction with high accuracy in response to the width fluctuation and meandering with high accuracy.

  Although FIG. 3 shows an example in which detection A is performed before detection B, in the present invention, the detection order of detection A and detection B is not limited to the example shown in FIG. That is, the detection B may be performed before the detection A, or the detection A and the detection B may be performed simultaneously.

  The position of the endmost cord in the width direction of the rubber / cord composite material 4 detected by the above calculation can be used to correct the shift in the width direction of the rubber / cord composite material 4 (step S12).

  A position at a predetermined distance in the width direction from the center of the width direction endmost cord with reference to the position of the width direction endmost cord detected using the end cord detection method of the rubber cord composite material 4 described above. Then, the ear rubber of the rubber-cord composite material 4 can be cut out by the cutter 5. In order to control the movement of the cutter 5 so that the cutter 5 is located at a predetermined distance in the width direction from the center of the endmost cord in the width direction, the following operation may be performed.

  An input device 9 is connected to the input unit 8a of the control device 8 shown in FIG. Using this input device, a set distance from the center of the outermost cord in the width direction to a predetermined position in the width direction as a position for inserting the blade of the cutter 5 into the rubber-cord composite material 4 is input. The input set distance is stored in the storage unit 8c of the control device and used for calculation in the calculation unit 8b.

  In addition to the above-described calculation for detecting the endmost cord of the rubber / cord composite material 4, the calculation unit 8 b performs calculation for position control of the cutter 5 when cutting the ear rubber. A command for moving the cutter 5 according to the calculation result is output from the output unit 8d to a cutter moving device (not shown).

A specific example of the calculation for controlling the position of the cutter 5 is as follows.
The position data of the outermost cord detected by the two-dimensional displacement sensor 6 provided upstream of the cutter 5 and movable integrally with the cutter 5 is repeatedly detected in accordance with the movement of the rubber / cord composite material 4. Then, when a change in the position of the endmost cord occurs due to meandering or the like, a deviation to be compensated is calculated from a value set by the distance from the center of the endmost cord as the position of the cutter blade, so that the cutter 5 Feed forward control is performed.

Position data of the endmost cord detected by a two-dimensional displacement sensor 7 provided on the downstream side of the cutter 5 and fixed separately from the cutter 5 and positions of the remaining ear rubber ends after being cut by the cutter 5 The data is repeatedly detected in accordance with the movement of the rubber-cord composite material 4, and the length from the outermost cord to the end of the ear rubber, that is, the amount of ear rubber is calculated. Then, the deviation between the calculated amount of ear rubber and the set amount of ear rubber is calculated, and feedback control is performed in which the cutter 5 is moved so as to eliminate the deviation. This feedback control can be PI control.
The position of the cutter 5 can be controlled by such feedforward control and feedback control.
The ear rubber of the rubber cord composite material 4 can be cut so that the cord at the end in the width direction is left in the rubber cord composite material 4. When the rubber / cord composite material 4 is used as a rubber member of a tire, a plurality of rubber / cord composite materials 4 are joined and used. In this case, conventionally, the endmost cord in the width direction has been cut off. According to the present invention, the amount of waste can be reduced as compared with the prior art by cutting the outermost cord in the width direction so as to remain in the rubber cord composite material 4.

1: Cord, 2: Calendar roll, 3: Rubber, 4: Rubber / cord composite material, 5: Cutter, 6: Two-dimensional displacement sensor, 7: Two-dimensional displacement sensor, 8: Control device, 9: Output device (monitor) 10) Input device

Claims (6)

A method of detecting the position of the cord in the end in the width direction in a rubber-cord composite material in which a plurality of cords arranged in parallel are embedded along the longitudinal direction of the rubber sheet while the rubber-cord composite material is moving Because
The two-dimensional displacement sensor measures the width direction end region of the rubber-cord composite material along the width direction, and obtains waveform data corresponding to the surface shape in the width direction of the rubber-cord composite material,
From this waveform data, the peak position and height of the peak of the waveform are obtained, and the peak of the peak that does not have an adjacent peak in a predetermined range is detected as the peak of the code at the extreme end in the width direction,
From this waveform data, find the peak of the peak of the waveform and the peak of the valley adjacent to the peak of the peak, and detect the peak whose peak exceeds a predetermined range as the peak of the code at the extreme end in the width direction.
A method for detecting an end code of a rubber-cord composite material.   2. The end code detection method for a rubber / cord composite material according to claim 1, wherein the two-dimensional displacement sensor is provided on the downstream side of a calender device for manufacturing the rubber / cord composite material.   The ear rubber of the rubber / cord composite material is cut out based on the position of the end cord in the width direction in the rubber / cord composite material detected by the end cord detection method of the rubber / cord composite material according to claim 1. How to remove the ear rubber from rubber cord composites.   4. The method for removing an ear rubber from a rubber / cord composite according to claim 3, wherein the cord at the end in the width direction is cut so as to remain in the rubber / cord composite. A two-dimensional displacement sensor;
The waveform data signal corresponding to the surface shape in the width direction of the rubber cord composite material from the two-dimensional displacement sensor is input, and from this waveform data, the position and height of the peak of the waveform peak are obtained, While detecting the peak of the peak without a peak as the peak of the code at the end of the width direction,
From this waveform data, obtain a wave height between the peak of the peak of the waveform and the peak of the valley adjacent to the peak of the peak, and an arithmetic unit that detects a peak whose peak exceeds a predetermined range as the peak of the code at the extreme end in the width direction. A control device comprising:
A device for detecting an end code of a rubber / cord composite material. The end code detection device according to claim 5;
Based on the position data of the end of the cord in the width direction of the rubber / cord composite material detected by the end cord detecting device, the position of the end of the cord in the width direction of the rubber / cord composite is used as a reference. A cutting device for cutting rubber;
A rubber-cord composite material for removing the ear rubber.

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