JP2010101721A - Method and apparatus for inspecting tire structure member on molding drum - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To inspect a tire structure member on a molding drum without halting producing a raw tire, and to associate an inspected member with the raw tire obtained by molding the inspected member. <P>SOLUTION: The tire structure member 5 is stuck to the molding drum 4, and then a distance from the surface of the tire structure member 5 is measured by using a point-observation type laser displacement gage 1 in a waiting period of a machine in which a molding operator carries out a joint matching operation and the like. Then, sticking position data and cross-section shape data of the tire structure member 5 are obtained based on data acquired in above measurement and measurement data of a distance from the surface of the molding drum 4 being previously measured. The obtained data is stored in a database 3 along with a barcode of the raw tire to be molded by using the tire structure member 5. Furthermore, the obtained data is compared with master data by using a comparison processing section 9, and an alarm is output by a comparison result output section 10, when a difference obtained in above comparison exceeds a prescribed threshold. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method and an apparatus for inspecting a tire constituent member attached to a molding drum, and in particular, to determine whether the shape and the attaching position of the tire constituent member are appropriate without stopping production of a raw tire. It is related with the inspection apparatus and method which can be performed.

  A pneumatic tire is generally formed into a predetermined shape by producing a raw tire (green tire) by combining various tire constituent members made of unvulcanized rubber and the like, and vulcanizing and molding the tire. In this green tire molding process, a molding method using a cylindrical molding drum is widely adopted.

  Conventionally, there is no apparatus for inspecting a tire constituent member attached on the molding drum. For this reason, in order to examine the arrangement of the tire constituent members on the molding drum, production of the raw tire is stopped and measurement is performed using a measure or the like. However, in order to suppress the decrease in productivity, the number of measurement points and measurement points are limited.

  Moreover, in order to investigate the cross-sectional shape of a tire structural member, the tire structural member is excised over about 20 cm, and is measured with a separate measuring instrument. However, since the excised tire components cannot be reused for tires, the trend of process capability can be grasped by the shape-measured member, but the shape-measured member and the tire molded from it are completely matched (one pair 1).

  The present invention has been made to solve such a problem, and the object thereof is to inspect tire constituent members on a molding drum without stopping production of raw tires, and to inspect the inspected members and the members. It is possible to make it correspond to the raw tire which shape | molded.

The invention of claim 1 is a method for inspecting a tire constituent member affixed to the surface of a molding drum, wherein a straight line parallel to the axis on the surface of the molding drum intersects the x axis, the straight line and the axis. The first step of acquiring the xy coordinate data of the surface of the tire component when the straight line is the y-axis, and the arrangement data or the cross-sectional shape of the tire component in the x-axis direction based on the xy coordinate data A second step of obtaining data, a third step of comparing the arrangement data or cross-sectional shape data with the reference data set in advance, and a fourth step of outputting the comparison result This is a method for inspecting a tire constituent member on a molding drum.
According to a second aspect of the present invention, in the method for inspecting a tire constituent member on the molding drum according to the first aspect, in the fourth step, a difference between the arrangement data or the cross-sectional shape data and the reference data is preset. An alarm is output when a certain threshold is exceeded.
According to a third aspect of the present invention, in the method for inspecting a tire constituent member on the molding drum according to the first aspect, xy coordinate data of the surface of another tire constituent member laminated on the surface of the tire constituent member is acquired. Based on the fifth step, the xy coordinate data acquired in the fifth step, and the xy coordinate data obtained in the first step, the arrangement data or the cross section of the other tire constituent member in the x-axis direction A sixth step for obtaining shape data; a seventh step for comparing the arrangement data or cross-sectional shape data with preset reference data; and an eighth step for outputting a comparison result. It is characterized by that.
A fourth aspect of the present invention is the method for inspecting a tire constituent member on a molding drum according to the first aspect, wherein the first step is a third parallel to the axis and separated from the surface of the molding drum. A step of acquiring first distance data from a straight line to the surface of the tire constituent member; the first distance data; and second distance data from the third straight line to the x-axis acquired in advance. And a step of calculating a difference between the two.
According to a fifth aspect of the present invention, in the method for inspecting a tire constituent member on the molding drum according to the first aspect, each step is executed at a plurality of positions in the circumferential direction of the molding drum.
The invention according to claim 6 is a point observation type displacement sensor that is movable in a direction parallel to the axis along the surface of the molding drum, and a distance to the surface of the tire constituent member that is measured along with the movement of the point observation type displacement sensor. And data processing means for obtaining arrangement data or cross-sectional shape data of the tire constituent member in the direction based on the distance to the surface of the molding drum, and means for comparing the arrangement data or cross-sectional shape data with reference data thereof And a means for outputting a comparison result, and an inspection device for a tire constituent member on a molding drum.
The invention according to claim 7 is directed to a line observation type displacement sensor disposed opposite to a direction parallel to the axis along the surface of the molding drum, and a distance to the surface of the tire constituent member measured by the line observation type displacement sensor. And data processing means for obtaining arrangement or cross-sectional shape data of the tire constituent member in the direction based on the distance to the surface of the molding drum, and means for comparing the arrangement data or cross-sectional shape data with reference data thereof And an inspection device for a tire constituent member on a molding drum.

  According to the present invention, it is possible to inspect a tire constituent member on a molding drum without stopping production of a raw tire, and it is possible to make the inspected member correspond to a tire molded from it.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram showing a configuration of a tire inspection apparatus according to an embodiment of the present invention. This tire inspection device has a function of inspecting the attaching position and the cross-sectional shape of the tire constituent member 5 attached on the molding drum 4.

  This tire inspection apparatus includes a point observation type laser displacement meter 1, an arithmetic processing unit 2 that processes the measurement data, and a measurement data database 3 that stores data processed by the arithmetic processing unit 2. In the database 3, the raw tire barcode read by the raw tire barcode reader 7 is also stored in association with the measurement data. Further, the tire inspection apparatus compares the measurement data read from the database 3 with the master data read from the on-drum shape master data database 81 provided in the process simulation system 8. A processing unit 9 and a comparison result output unit 10 for outputting the result are provided. The comparison processing unit 9 is connected to a quality recording system 11, and a search system 12 is connected to the quality recording system 11. In the above configuration, the arithmetic processing unit 2 and the comparison processing unit 9 are functional blocks realized by computer software.

  The point observation type laser displacement meter 1 is positioned at a certain distance from the surface (outer peripheral surface) of the molding drum 4 by a guide member fixed to a driving unit such as a motor (not shown) and a holding unit of the molding drum 4. Is configured to be capable of reciprocating in a direction parallel to the axis 41. A laser light emitting element and a light receiving element are provided, and a function of measuring the distance to the reflecting surface of the laser light based on the time difference from the light emission to the light reception is provided. In this embodiment, the distance to the surface (outer peripheral surface) of the tire constituent member 5 attached to the surface of the molding drum 4 is measured. Further, the distance to the surface of the molding drum 4 is measured before the tire constituent member 5 is attached.

  The calculation processing unit 2 stores the distance data to the surface of the molding drum 4 measured by the point observation type laser displacement meter 1 before the tire constituent member 5 is pasted in the database 3 as it is. Further, the difference between the distance data to the surface of the tire component 5 affixed to the surface of the molding drum 4 and the distance data to the surface of the molding drum 4 stored in the database 3 is calculated and the value is calculated. Save to database 3. As a result, the xy orthogonal coordinates are set on the surface of the molding drum 4 and parallel to the axis 41 with the x-axis as a straight line passing through the center of the left end of the molding drum 4 and perpendicular to the x-axis. Position data of the surfaces of the molding drum 4 and the tire component 5 expressed by (x ≧ 0, y ≧ 0) are stored in the database 3.

  In this position data, a region x where y has a positive value represents a region where the tire constituent member 5 is present, and a value y represents the thickness of the tire constituent member 5. Therefore, from this position data, the affixing position (arrangement) and cross-sectional shape of the tire constituent member 5 can be obtained. The operation of measuring the distance to the surface of the tire component 5 with the point observation type laser displacement meter 1 after the molding drum 4 is rotated by a predetermined angle by the motor 6 is executed a plurality of times within one revolution of the molding drum 4. Thus, position data obtained by adding the coordinate of the angle θ in the circumferential direction of the molding drum 4 to the xy orthogonal coordinates can be acquired.

  The master data (reference data) stored in the database 81 creates (simulates) the affixing position, the cross-sectional shape of the tire constituent member 4 to be affixed to the molding drum 4, and the theoretical cross-sectional shape when a plurality of members are affixed. ) Result data.

  The comparison processing unit 9 compares the master data stored in the database 81 and the measurement data stored in the database 3 (pasting position data, cross-sectional shape data), and the difference between them is within a predetermined threshold ( If the threshold value is exceeded, “OK” is generated, and if the threshold value is exceeded, “NG” comparison result data is generated, sent to the comparison result output unit 10, and stored in the database 3.

  The comparison result output unit 10 includes a display device that outputs (displays) video, a speaker that outputs audio, and the like. When data representing “OK” is received, the video is output and “NG” is displayed. When the data to represent is received, the video and alarm sound are output. Therefore, the difference between the pasting position data or cross-sectional shape data of the tire constituent member 5 stored as master data, or the theoretical cross-sectional shape data when a plurality of members are pasted, and the measurement data is a predetermined threshold value. An alarm will be output when the value exceeds. When the difference is within a predetermined threshold, the comparison processing unit 9 does not output the comparison result data (“OK”), and outputs the comparison result data (“NG”) only when the threshold is exceeded. You may comprise as follows.

  The raw tire code reader 7 reads the bar code of the raw tire molded using the tire constituent member 5 attached to the molding drum 4 and sends it to the database 3. This barcode is stored in association with measurement data (pasting position data, cross-sectional shape data) of the tire component 5 and the like.

  The quality recording system 11 stores the measurement data of the tire constituent member 5 on the molding drum 4, the comparison result data (OK / NG), and the corresponding raw tire barcode. Thereby, quality control of a raw tire can be performed from a member level.

  The search system 12 searches for data stored in the quality recording system 11 by using a bar code as a search key when a defect occurs in a raw tire or a product tire, whereby the position where each tire component is affixed This is a system for investigating the cross-sectional shape. This system makes it possible to quickly respond to defects.

FIG. 2 is a flowchart showing the operation of the tire inspection apparatus according to the embodiment of the present invention. As a premise for executing this operation, the point observation type laser displacement meter 1 is moved in parallel to the axis 41 of the molding drum 4 before the tire constituent member 5 is attached to the molding drum 4, and is moved to the surface of the molding drum 4. The distance D ₀ is measured, and the data is stored in the database 3. Before performing this operation, the molding drum 4 is rotated by the motor 6 and the tire constituent member 5 is pasted on the surface of the molding drum 4 by a pasting device (not shown). The rotation and the operation of the pasting apparatus are stopped. When the operation is stopped, the molder performs joint alignment or the like, or performs a preparatory work for the next tire constituent member in the attaching device.

First, the point observation type laser displacement meter 1 is set to the start position (the position of x = 0 which is the left end of the molding drum 4) (step S1), and then the point observation type laser displacement meter 1 is moved along the surface of the molding drum 4. while it is moving in parallel with a constant speed in the axial line 41, until it reaches the end position (the right end position of the molding drum 4), for measuring the distance D ₁ of the up surface of the tire component 5 (step S2, S3). The measured data is stored in the database 3.

When the point observation type laser displacement meter 1 has reached the end position (S3: YES), the distance D ₀ up to the surface of the building drum 4 which has been previously stored in the database, until this measured surface of the tire component 5 the distance _{D 1} is subtracted. Then, based on the subtraction data from the start position to the end position, the sectional shape data and the pasting position data of the tire constituent member 5 are obtained (step S4).

  Next, it is checked whether or not the distance to the surface of the tire constituent member 5 has been measured for one round of the molding drum 4 (step S5). After the rotation (step S6), steps S1 to S4 are repeated, and when the measurement has been completed, the obtained data is stored in the database (step S7).

  Next, the comparison processing unit 9 reads the cross-sectional shape data and the pasting position data of the tire constituent member 5 on the molding drum 4 obtained previously from the database 6 and also reads the corresponding master data from the database 81, Compare (step S8). If the difference is within a preset threshold, the cross-sectional shape and the pasting position are good (OK), and if the difference exceeds the predetermined threshold, the cross-sectional shape and the pasting position are bad (NG), Comparison result data representing them is generated. This comparison result data is sent to and output from the comparison result output unit 10, sent to the database 3, associated with the measurement data, and stored (step S9).

  Here, in step S8, the cross-sectional shape data and the pasting position data are sequentially compared for each position (angle) in the circumferential direction of the molding drum 4. In addition to comparison result data of individual circumferential positions, comparison result data that combines them may be generated.

  When the inspection of the tire constituent member 5 is completed by the above procedure, the tire constituent member 5 is used to form a raw tire. And after printing a barcode with the printing apparatus which is not shown in figure on the shape | molded raw tire, the barcode is read with the raw tire barcode reader 7, and the cross-sectional shape data and the pasting position of the tire structural member 5 on the molding drum 4 Data and comparison result data with master data are stored in the database 3 in association with each other. Of these data, the bar code and the comparison result data are also stored in the quality recording system 11.

Thus, according to the tire inspection apparatus of the embodiment of the present invention, since the cross-sectional shape data and the pasting position data of the tire constituent member 5 are acquired using the waiting time of the tire constituent member pasting apparatus, The tire constituent member 5 on the molding drum 4 can be inspected without impeding productivity. For this reason, it is possible to measure a plurality of locations for one tire or to measure all the tires to be produced.
Further, when the difference between the cross-sectional shape data of the tire constituent member 5 on the molding drum 4 and the master data exceeds a predetermined threshold value, an alarm is output to prevent the molding using the defective member. be able to. Similarly, when the difference between the pasting position data of the tire constituent member 5 on the molding drum 4 and the master data exceeds a predetermined threshold value, an alarm is output to mold using the defective member, and You can prevent forgetting to paste.
Further, when a defect occurs in the raw tire or the product tire, the data stored in the quality recording system 11 is searched using the barcode as a search key, so that it is possible to quickly cope with the defect.
Further, since the raw tire can be molded using the inspected tire constituent member 5, it is effective for the start-up of manufacturing (manufacture of the first product) and the like, such as the investigation of the relationship between the cross-sectional shape and the workmanship.

The present invention can be modified as described in the following (1) to (3).
(1) Instead of the point observation type laser displacement meter 1, a line observation type laser displacement meter is used. In this case, the distance to the surface of the tire component 5 with respect to one position (angle) in the circumferential direction of the molding drum 4 can be measured simultaneously.
(2) Instead of the point observation type laser displacement meter 1, a surface observation type laser displacement meter is used. In this case, the measurement can be performed over the entire circumference of the molding drum 4 by performing the measurement while the molding drum 4 is rotating.
(3) When laminating a plurality of tire constituent members, by measuring each time the individual tire constituent members are pasted, the cross-sectional shape data and pasting position data of the individual tire constituent members are obtained, Pass / fail can be determined.

It is a figure which shows the structure of the tire inspection apparatus of embodiment of this invention. It is a flowchart which shows operation | movement of the tire inspection apparatus of embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Point observation type laser displacement meter, 2 ... Operation processing part, 3 ... Database of measurement data, 4 ... Molding drum, 5 ... Tire component, 6 ... Motor, 7 ... Raw tire bar code reader, 9 ... Comparison processing unit, 10 ... Comparison result output unit, 81 ... Database of master data of on-drum shape.

Claims (7)

A method for inspecting a tire component attached to the surface of a molding drum,
A first step of acquiring xy coordinate data of the surface of the tire component when a straight line parallel to an axis on the surface of the molding drum is an x-axis and a straight line intersecting the straight line and the axis is a y-axis; The second step for obtaining the arrangement data or the cross-sectional shape data in the x-axis direction of the tire constituent member based on the xy coordinate data, the arrangement data or the cross-sectional shape data, and their reference data set in advance A method for inspecting a tire constituent member on a molding drum, comprising: a third step of comparing the first and second steps, and a fourth step of outputting a comparison result. In the inspection method of the tire structural member on the molding drum according to claim 1,
The fourth step outputs a warning when a difference between the arrangement data or the cross-sectional shape data and the reference data exceeds a preset threshold value. Inspection method. In the inspection method of the tire structural member on the molding drum according to claim 1,
For another tire constituent member laminated on the surface of the tire constituent member, a fifth step of acquiring xy coordinate data of the surface, the xy coordinate data acquired in the fifth step, and the first step The sixth step for obtaining the arrangement data or the cross-sectional shape data in the x-axis direction of the other tire constituent member based on the xy coordinate data obtained in step, and the arrangement data or the cross-sectional shape data are preset. A method for inspecting a tire constituent member on a molding drum, comprising a seventh step of comparing the reference data with an eighth step of outputting a comparison result. In the inspection method of the tire structural member on the molding drum according to claim 1,
The first step includes obtaining first distance data from a third straight line parallel to the axis and away from the surface of the molding drum to the surface of the tire constituent member, and the first step. And a step of calculating a difference between the distance data of the second distance data acquired in advance from the third straight line to the x-axis, and inspecting a tire constituent member on the molding drum, Method. In the inspection method of the tire structural member on the molding drum according to claim 1,
A method for inspecting a tire constituent member on a molding drum, wherein each step is executed at a plurality of positions in the circumferential direction of the molding drum.   A point observation type displacement sensor that can move along the surface of the molding drum in a direction parallel to the axis, and the distance to the surface of the tire component measured along with the movement of the point observation type displacement sensor and the surface of the molding drum Data processing means for obtaining the arrangement data or cross-sectional shape data of the tire constituent member in the direction based on the distance of the tire; means for comparing the arrangement data or cross-sectional shape data with their reference data; and outputting a comparison result And an inspection device for a tire constituent member on a molding drum.   A line observation type displacement sensor disposed opposite to the molding drum in a direction parallel to the axis, a distance to the surface of the tire component measured by the line observation type displacement sensor, and a surface of the molding drum Data processing means for obtaining arrangement or cross-sectional shape data of the tire component in the direction based on the distance of the tire, means for comparing the arrangement data or cross-sectional shape data with their reference data, and means for outputting the comparison result And a tire component inspection device on a molding drum.

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