JP2012002522A - Method and apparatus for checking external shape of belt-like members - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and an apparatus for checking the external shape of belt-like members making it possible to know how the external shape of a belt-like member varies in the lengthwise direction of the member.SOLUTION: An external shape checking apparatus for belt-like members prepares data for checkup use by arranging detected two-dimensional contour data in the lengthwise direction of a belt-shaped member, and extracts from the data for checkup use feature data of the external shape of the belt-like member indicating how the contour of the external shape of the belt-like member indicated by each set of the two-dimensional contour data varies in the lengthwise direction of the member. As each set of the feature data extracted from the data for checkup use therefore indicates how the thickness, positions of ends in the widthwise direction of the belt-like member, etc. vary in the lengthwise direction of the member, it reveals how the external shape of the belt-like member varies in the lengthwise direction of the member, which is a remarkable advantage for attempts to improve characteristics of tires.

Description

  The present invention is, for example, in the manufacturing process of an automobile tire, and the outer shape of the belt member for inspecting the outer shape of the belt member such as a belt member wound around a forming drum or the belt member placed on the conveyor. The present invention relates to an inspection method and an apparatus therefor.

  As this type of belt-shaped member inspection device, an irradiation device that irradiates slit light to the end in the width direction of a belt-shaped member wound around a forming drum, and an irradiation line formed on the belt-shaped member by the irradiation device are imaged. An imaging device is provided, and the irradiation line is imaged by the imaging device at a plurality of positions in the drum circumferential direction while rotating the forming drum, and each irradiation line imaged by the imaging device is misaligned with respect to a pre-registered shape pattern. It is known that the amount of positional deviation is added and the amount of positional deviation in the width direction of the belt-like member is determined based on the added value while obtaining the amount (see, for example, Patent Document 1). .)

JP 2004-351810 A

  By the way, in the inspection apparatus, the amount of positional deviation with respect to a pre-registered shape pattern of the shape of the irradiation line imaged at each position in the drum circumferential direction is obtained, and based on the value obtained by adding the amount of each positional deviation, Appropriateness of the amount of positional deviation in the width direction is determined. For this reason, for example, a value obtained by adding each positional deviation amount when the band-shaped member is wound obliquely from one side to the other in the width direction as it goes from one side to the other in the length direction on the molding drum, and on the molding drum A value obtained by adding each positional deviation amount when the belt-like member is wound straightly from one side in the length direction to the other and is biased to one side in the width direction, and the belt-like member is arranged in the width direction on the forming drum. There is a possibility that the value obtained by adding the respective misalignment amounts when winding in a meandering manner is the same. That is, the inspection apparatus cannot detect how the position in the width direction of the band-shaped member changes in the length direction of the band-shaped member on the forming drum.

  Here, how the width direction position of the band-shaped member changes in the length direction, how the position of the band-shaped member in the thickness direction changes in the length direction, etc. For example, it affects the radial force variation (RFV), lateral force variation (LFV), and lateral force deviation (LFD) such as concentric force (COF). It is advantageous to improve the tire characteristics to know how the appearance shape such as the position of the direction changes in the length direction of the belt-like member.

  This invention is made in view of the said subject, The place made into the objective of the strip | belt-shaped member which can know how the external appearance shape of a strip | belt-shaped member is changing in the length direction of a strip | belt-shaped member. An object is to provide an appearance shape inspection method and apparatus.

  In order to achieve the above object, the present invention provides a strip-shaped member appearance shape inspection method for inspecting a strip-shaped member appearance shape, wherein the contour of the strip-shaped member appearance shape is defined in the thickness direction of the strip-shaped member at a plurality of positions in the width direction of the strip-shaped member. Using a extracting means that can extract the two-dimensional contour data of the belt-like member and extracting the two-dimensional contour data of the outer shape of the belt-like member at a plurality of locations in the length direction of the belt-like member, and the two-dimensional contour detected by the detection step From the inspection data creation process that creates data for inspection by arranging data in the length direction of the strip member, and the inspection data created in the inspection data creation process, the appearance shape of the strip member indicated by each two-dimensional contour data A feature data extracting step of extracting feature data of the external shape of the band-shaped member indicating how the contour changes in the length direction of the band-shaped member.

  Further, the present invention provides a strip-shaped member appearance shape inspection apparatus for inspecting a strip-shaped member appearance shape, wherein the contour of the strip-shaped member appearance shape is two-dimensional contour data in the thickness direction of the strip-shaped member at a plurality of positions in the width direction of the strip-shaped member. Detecting means for detecting as, inspection data creating means for creating inspection data by arranging the two-dimensional contour data detected by the detecting means in the length direction of the belt-like member, and for inspection created by the inspection data creating means Feature data extracting means for extracting feature data of the outer shape of the belt-shaped member indicating how the contour of the belt-shaped member indicated by each two-dimensional contour data changes in the length direction of the belt-shaped member from the data; I have.

  In this way, the inspection data is created by arranging the detected two-dimensional contour data in the length direction of the strip member, and the contour of the outer shape of the strip member indicated by each two-dimensional contour data is generated from the inspection data. Since the feature data of the outer shape of the band-shaped member indicating how it changes in the length direction of the band-shaped member is extracted, as the feature data, for example, the band-shaped member at a predetermined position in the width direction of the band-shaped member is extracted from the inspection data. When the data in the thickness direction is extracted in a predetermined range continuous in the length direction of the strip member, the extracted data indicates how the thickness of the strip member changes in the length direction of the strip member. . Further, as the feature data, for example, when the data of the width direction end position of the belt-like member is extracted from the inspection data in a predetermined range continuous in the length direction of the belt-like member, the extracted data is the width direction end of the belt-like member. It shows how the position of the portion changes in the length direction of the belt-like member.

  According to the present invention, the feature data extracted from the inspection data indicates how the thickness of the strip member and the width direction end position of the strip member change in the length direction of the strip member. It can be known easily and reliably how the appearance of the belt-like member changes in the length direction of the belt-like member, which is extremely advantageous for improving tire characteristics.

The top view of the external appearance inspection apparatus of the strip | belt-shaped member which shows one Embodiment of this invention Side view of strip-shaped member appearance shape inspection device Block diagram of strip shape appearance inspection device Example of 2D contour data Flow chart showing operation of control device A plurality of two-dimensional contour data arranged in the length direction of the male strip member Example of inspection data Example of inspection data displayed on a display device Flow chart showing operation of control device Example of feature data Example of data obtained by changing the luminance data in FIG. 10 in units of thickness Flow chart showing operation of control device Flow chart showing operation of control device Example of inspection data Example of processing inspection data Example of processing inspection data Example of processing inspection data Example of processing inspection data Example of feature data Flow chart showing operation of control device Sectional view of strip-shaped member Example of inspection data Example of processing inspection data Example of processing inspection data Example of processing inspection data Example of processing inspection data Example of feature data Flow chart showing operation of control device Example of inspection data Example of processing inspection data Example of processing inspection data

  An apparatus and method for inspecting the appearance of a belt-like member according to an embodiment of the present invention will be described with reference to FIGS.

  The strip-shaped member appearance shape inspection device includes a pair of detection devices 10 disposed at a predetermined distance from the outer peripheral surface of the forming drum 1, a sensor bracket 20 that supports each detection device 10, and each sensor bracket. A first base 30 that supports 20 so as to be movable in the axial direction of the forming drum 1 and a second base 40 that supports the first base 30 so as to be movable in the radial direction of the forming drum 1 are provided. Each detection device 10 is a well-known two-dimensional displacement meter using light such as a laser. In this embodiment, light is irradiated in the radial direction of the forming drum 1 and is wound around the outer peripheral surface of the forming drum 1. It is possible to detect two-dimensional contour data in the thickness direction of the belt-like member at a plurality of positions in the width direction of the member.

  In addition, this external shape inspection apparatus detects a known rotary encoder 50 and counter 51 as a rotational direction position detecting device for detecting the rotational position of the forming drum 1 and a 0 ° position in the rotational direction of the forming drum 1. The origin detection device 60 is provided.

  The forming drum 1 has a well-known configuration that can be expanded and contracted in the radial direction, and a belt member, an edge tape, a tread member, or the like as a belt-like member is wound around to form an annular belt member, or a pair of sidewalls Band-shaped members such as a member, an inner liner member, and a carcass member are sequentially wound to form an annular band member. 1 and 2, the first belt member B1 and the second belt member B2 are wound around the forming drum 1. Further, the second belt member B2 is wound around the outer side in the radial direction of the first belt member B1, and the width dimension is smaller than that of the first belt member 1B.

  Each detection device 10 is configured to detect the distance to the inspection object within the linear detection range DA, and in this embodiment, is wound around the outer peripheral surface of the forming drum 1 as described above. It is possible to detect two-dimensional contour data in the thickness direction of the belt-like member at a plurality of positions in the width direction of the belt-like member. Each bracket 20 is supported by the first base 30 so as to be movable in the axial direction of the molding drum 1 (in the width direction of the belt-like member wound around the molding drum 1), and a ball screw 30a provided inside the first base 30. And it moves to the axial direction of the forming drum 1 by the motor 30b for the base which drives the ball screw 30a. The second base 40 supports the first base 30 so as to be movable in the radial direction of the molding drum 1 via a pair of cylinders 41 made of a known air cylinder or mechanical cylinder.

  The rotary encoder 50 is configured to output a pulse wave as the molding drum 1 rotates. The counter 51 is connected to the rotary encoder 50, and the counter 51 counts the pulse wave of the rotary encoder 50 so that the rotational direction position of the forming drum 1 is detected.

  The origin detection device 60 includes a known proximity switch or the like, and detects, for example, a concave portion provided at a position of the molding drum 1 in the rotation direction of 0 °.

  Each detection device 10, the counter 51, and the origin detection device 60 are connected to a control device 70 composed of a known computer. The control device 70 is connected to a storage device 71 composed of a known hard disk, a display device 72 having a known liquid crystal screen, and an input device 73 composed of a known keyboard. On the other hand, the forming drum 1 has a motor 1 a for rotational driving and a forming drum control device 1 b for controlling the motor 1 a, and the forming drum control device 1 b is connected to the control device 70. The base motor 30 b of the first base 30 and each cylinder 41 of the second base 40 are also connected to the control device 70. The forming drum control device 1b controls the motor 1a when forming the annular belt member.

  In the appearance inspection apparatus for the belt-shaped member configured as described above, the belt-shaped members such as the first belt member B1, the second belt member B2, the edge tape, and the tread member are sequentially wound around the molding drum 1 in an enlarged state. When an annular belt member is formed by being attached, or when a belt-shaped member such as a pair of sidewall members, an inner liner member, and a carcass member is sequentially wound around the forming drum 1 to form an annular band member. In addition, the appearance of each belt-like member is inspected. First, the operation of the control device 70 when inspecting the external shape of the first belt member B1 will be described with reference to the flowchart of FIG.

  First, when a signal indicating completion of winding of a belt-like member such as the first belt member B1 is received from the forming drum 1b (S1), the position of each detection device 10 is set for each tire type by the base motor 30a and each cylinder 41. It moves to the predetermined position stored in the memory | storage device 71 for every kind of strip | belt-shaped member (S2). Thereby, for example, each detection device 10 is arranged at a position separated from the axial center of the forming drum 1 by a predetermined distance LD. Moreover, the control apparatus 70 rotates the motor 1a by the forming drum control apparatus 1b (S3). Thereby, the forming drum 1 starts to rotate at a predetermined speed.

  Subsequently, when the origin detection device 60 detects the concave portion provided at the position of 0 ° in the rotation direction of the forming drum 1 (S4), the thicknesses at both ends in the width direction of the first belt member B1 are detected by each detection device 10. Two-dimensional contour data in the vertical direction are continuously detected until the forming drum 1 rotates 360 ° (S5), and each two-dimensional contour data is detected by the rotary encoder 50 and the counter 51 in the rotational direction position data of the forming drum 1. Is stored in the storage device 71 so as to correspond to (S6).

  Here, “continuous” means that, for example, two-dimensional contour data is detected when the forming drum 1 is in a rotational direction position of 0 °, 2 °, 4 °,. Note that the two-dimensional contour data is continuously detected every predetermined time, and the contour data is continuously detected at a plurality of positions in the rotation direction by other methods. Moreover, the example of the two-dimensional outline data of the thickness direction in the width direction edge part of 1st belt member B1 detected by each detection apparatus 10 is shown in FIG. A position M in FIG. 4 is a position away from the center in the axial direction of the forming drum 1 by the predetermined distance LD. Further, as shown in FIG. 4, each two-dimensional contour data is data in the thickness direction of the strip member at a plurality of positions in the width direction of the strip member.

  When the detection in step S6 ends (S7), the rotation of the motor 1b is stopped by the forming drum control device 1b (S8).

  Next, inspection data is created by arranging the two-dimensional contour data in the length direction of the belt-like member in the order of imaging (S9). In the present embodiment, for example, as shown in FIG. 6, after each two-dimensional contour data is arranged in the length direction of the band-shaped member in the imaging order, each thickness of the arranged two-dimensional contour data is shown, for example, as shown in FIG. 7. The inspection data is created by subjecting the vertical data to luminance gradation processing, for example, in 256 gradations based on a predetermined color tone standard. Here, the numerical value of the data in the direction of the thickness of the belt-shaped member in FIGS. 4 and 6 may be the actual thickness (mm) or may represent the other. Equal to thickness. Further, when gradation processing is performed in 256 gradations in FIG. 7, it is possible to set 0 in the thickness direction in FIG. 4 to 0 in 256 gradations and 30 in the thickness direction to 255 in 256 gradations. In the embodiment, a range of ± 2.5 mm with respect to the position of the upper end portion of the first belt member B1 (position of approximately 10.5 in the present embodiment) (± T / 3 or more with respect to the thickness T of the belt-shaped member) Gradation is processed to 256 gradations. The position (for example, 10.5) of the upper end portion of the first belt member B1 is stored in the storage device 71 for each tire type and each belt-like member type.

  When the creation of the inspection data in step S9 is completed, the two-dimensional contour data subjected to gradation processing as shown in FIG. 7 are arranged in the order of imaging and displayed on the display device 72 as shown in FIG. 8 (S10). In FIG. 8, the horizontal direction is the length direction of the strip member (the rotating direction of the forming drum), and the vertical direction is the width direction of the strip member.

  Subsequently, the determination of the amount of deflection in the thickness direction of the belt-shaped member (first belt member B1) (S11), the determination of the presence or absence of the belt-shaped member (S12), the determination of the amount of meandering in the width direction of the belt-shaped member 1 (S13) Then, determination 2 (S14) of the amount of meandering in the width direction of the band-shaped member (S14) and determination of the amount of splice between the lengthwise ends of the band-shaped member (S15) are started. In addition, the determination of step S11-S15 can set the presence or absence of implementation for every kind of strip | belt-shaped member, for example, determination of step S11, step S12, step S13, and step S15 in the case of each belt member B1, B2. In the case of a tread member, the determinations of Step S11, Step S12, Step S14 and Step S15 are performed, and in the case of a carcass member, the determinations of Step S11, Step S12, Step S13 and Step S15 are performed.

  Further, in this embodiment, every time the belt-like member is wound around the forming drum 1, the processing from the step S1 is performed. For this reason, inspection of the external shape of all the strip-shaped members is performed, which is extremely advantageous in improving tire characteristics.

  Next, the operation of the control device 70 when determining the amount of deflection in the thickness direction of the belt-like member will be described with reference to the flowchart of FIG.

  First, in the inspection data created in step S9 (image data that has been subjected to luminance gradation processing to 256 gradations), as shown in FIG. 8, the two-dimensional contour data detected by one of the detection devices 10 is strip-shaped. In the two-dimensional contour data detected by the other detection device 10 at the predetermined position P1 in the width direction of the member (for example, a position of 40 mm), the luminance data (in the band shape) at the predetermined position P2 in the width direction of the band-shaped member (for example, a position of 20 mm). (Data in the thickness direction of the member) is extracted in a continuous predetermined range in the length direction of the belt-like member (for example, a range of 360 ° in the rotation direction of the forming drum) (S101). The extracted data is, for example, data as shown in FIG. 10, and this data is handled as feature data.

  Subsequently, in the extracted feature data as shown in FIG. 10, the maximum value and the minimum value of the luminance are obtained (S102), and the difference between the maximum value and the minimum value of the luminance is performed by reversing the step S9. The actual thickness unit (mm) is converted (S103), the value after the conversion in step S103 is compared with a predetermined threshold value (S104), and if the converted value is equal to or less than the predetermined threshold value, it is normal. A determination is made (S105), and if the converted value exceeds a predetermined threshold value, it is determined that there is an abnormality (S106), and if it is abnormal, for example, a predetermined display is performed by the display device 72 (S107). In this case, the value obtained in step S103 is the amount of deflection in the thickness direction of the belt-shaped member. In the present embodiment, the value obtained in step S103 is compared with the predetermined threshold value. However, the difference between the maximum value and the minimum value of the luminance can be compared with the threshold value.

  As shown in FIG. 11, it is also possible to convert all the luminance data in FIG. 10 into actual thickness units (mm) and handle the entire feature data as the amount of deflection in the thickness direction of the belt-shaped member. . In this case, it is possible to easily and reliably grasp how the amount of deflection in the thickness direction of the band-shaped member changes over the length direction of the band-shaped member. This is extremely effective in knowing how the length of the member changes. Further, the amount of deflection of the belt-shaped member and how the amount of deflection changes in the length direction of the belt-shaped member (the circumferential direction of the forming drum) affects the RVF of the tire characteristics.

  Next, the operation of the control device 70 when determining the presence or absence of a belt-like member will be described with reference to the flowchart of FIG.

  First, in the inspection data created in step S9 (image data that has been subjected to luminance gradation processing to 256 gradations), as shown in FIG. 8, the two-dimensional contour data detected by one of the detection devices 10 is strip-shaped. In the two-dimensional contour data detected by the other detection device 10 at the predetermined position P1 in the width direction of the member (for example, a position of 40 mm), the luminance data (in the band shape) at the predetermined position P2 in the width direction of the band-shaped member (for example, a position of 20 mm). (Data in the thickness direction of the member) is extracted in a continuous predetermined range in the length direction of the belt-like member (for example, a range of 360 ° in the rotation direction of the forming drum) (S111). The extracted data is, for example, data as shown in FIG. 10, and this data is handled as feature data.

  Subsequently, in the extracted feature data as shown in FIG. 10, an average value of luminance is obtained (S112), and the average value obtained in step S112 is converted into an actual thickness unit ( mm) (S113), the value after the conversion in step S113 is compared with a predetermined threshold (S114), and if the value after the conversion is equal to or greater than the predetermined threshold, it is determined as normal (S115). If the converted value is less than the predetermined threshold value, it is determined that there is an abnormality (S116). If the value is abnormal, for example, the display device 72 performs a predetermined display (S117). Thereby, it is possible to easily and reliably detect forgetting to wind the belt-like member from the feature data.

  Next, the operation of the control device 70 when performing the determination 1 of the meandering amount in the width direction of the belt-like member will be described with reference to the flowchart of FIG.

  First, in the inspection data created in step S9 (image data subjected to luminance gradation processing to 256 gradations), for example, inspection data as shown in FIG. 14, a known edge is used using a Prewitt filter, a Sobel filter, or the like. By performing enhancement processing or extracting a range of a predetermined luminance or higher (for example, luminance of 25 or higher), as shown in FIG. 15, an area AR where the band-like member appears on the inspection data is extracted (S121). ). At this time, since there is a possibility that the area AR1 other than the belt-shaped member may be extracted as noise, by performing an area reduction process for reducing the area to a certain extent, or by performing a process for deleting an area having a predetermined area or less, As shown in FIG. 16, the area AR1 other than the area AR of the belt-like member is deleted (S122). In addition, as shown by AR2 in FIG. 16, in the splice portion between the longitudinal ends of the belt-like member, when a part of the widthwise end of the belt-like member is acute, or as shown by AR3 Since the data in the area of the belt-shaped member may be missing, the area enlargement process for enlarging the area to a certain extent is performed, or the area enlargement process for enlarging the size of each pixel in the area AR by a certain extent. By doing so, as shown in FIG. 17, an acute angle portion or a portion lacking data is deleted (S123).

  Then, as shown in FIG. 18, only the boundary line AL is extracted from the area AR of the strip-shaped member (S124). Here, the boundary line AL represents the position in the width direction end of the belt-shaped member. Further, the half width of the belt-like member is obtained at each rotational position of the forming drum 1 (S125). The half width of the belt-like member can be obtained by calculation because the position M in FIG. 18 is a position away from the center in the axial direction of the forming drum 1 by the predetermined distance LD. The obtained width of the belt-like member is, for example, data as shown in FIG. 19, and this data is handled as feature data.

  Subsequently, the full width of the belt-like member at each rotational position of the forming drum 1 is obtained by adding half widths at each rotational position of the forming drum 1 obtained for each detection device 10 (S126).

  Subsequently, in the extracted feature data as shown in FIG. 19, the difference between the maximum value and the minimum value of the full width of the belt-like member is obtained (S127), and the value obtained in step S127 is compared with a predetermined threshold value ( S128), if it is equal to or less than the threshold value, it is determined as normal (S129), if it exceeds the threshold value, it is determined as abnormal (S130), and if it is abnormal, for example, a predetermined display is performed by the display device 72 (S131). In this case, the value obtained in step S127 is the amount of meandering in the width direction of the belt-shaped member.

  It is also possible to treat the entire feature data as shown in FIG. 19 as the amount of meandering in the width direction of the belt-like member, and at each rotational position of the forming drum 1 as determined in step S126. It is also possible to treat the entire width of the obtained band-shaped member as the amount of meandering in the width direction of the band-shaped member. In these cases, how the amount of meandering in the width direction of the band-shaped member extends over the length direction of the band-shaped member. Since it can be easily and reliably grasped by the feature data, it is extremely effective in knowing how the appearance shape of the belt-like member changes in the length direction of the belt-like member. Further, the value obtained in step S127 and how the amount of meandering in the width direction of the belt-shaped member changes in the length direction of the belt-shaped member (the circumferential direction of the forming drum) affects the LFD of the tire characteristics. give.

  Next, the operation of the control device 70 when performing the determination 2 of the meandering amount in the width direction of the belt-like member will be described with reference to the flowchart of FIG. Note that the determination 2 of the amount of meandering in the width direction of the band-shaped member is performed on the band-shaped member such as a tread member, and the band-shaped member has a band shape at a predetermined position in the width direction on one surface of the band-shaped member where the determination is performed. A groove GR extending over the length direction of the member is provided (see FIG. 21). Further, the groove GR is formed by a protrusion provided on a base when the strip-like member is extruded. Further, when the groove GR is formed on one surface in the thickness direction of the belt-shaped member by the base, both sides in the width direction of the groove GR are slightly raised in the thickness direction from one surface in the thickness direction of the belt-shaped member, and the length of the belt-shaped member is increased. A pair of convex portions CV extending in the width direction is formed.

  When performing determination 2 of the meandering amount in the width direction of the band-shaped member, first, in one of the detection devices 10 in Step S2 to Step S6, a groove on one surface in the thickness direction of the band-shaped member is used. Two-dimensional contour data at the position of GR is detected.

  Subsequently, when the determination 2 of the meandering amount in the width direction of the belt-shaped member is started, first, the inspection data (image data that has been subjected to the luminance gradation process to 256 gradations) created in step S9, for example, FIG. The dynamic binarization process is performed on the inspection data as shown in (S141). The dynamic binarization process, for example, obtains an average value of the strip member thickness direction data at each position in the forming drum rotation direction, and calculates the thickness data of each strip member on the inspection data and the average value. Do this by finding the difference. Thereby, the unevenness | corrugation which generate | occur | produced in the thickness direction one surface of a strip | belt-shaped member appears as a difference with the said average value.

  Subsequently, by extracting a range of a predetermined size or more from the difference data of the average values obtained for the thickness data of each strip member on the inspection data, as shown in FIG. 23, the inspection data Above, the area | region AR of each convex-shaped part CV is extracted (S142). In this case, the region AR1 other than the region AR of each convex portion CV may be extracted as noise, and the region AR of each convex portion CV may be divided in the rotation direction of the molding drum 1. Therefore, first, a region enlargement process is performed to enlarge the region to a certain extent in the rotation direction of the molding drum 1 (S143), and the region AR of each convex portion CV is moved in the rotation direction of the molding drum 1 as shown in FIG. As shown in FIG. 25, by performing a region reduction process that continuously reduces the region to a certain extent or a process that deletes a region having a predetermined area or less, the region other than the region AR of each convex portion CV Area AR1 is deleted (S144).

  Next, as shown in FIG. 26, a region RAR other than the region AR is extracted (S145), and as shown in FIG. 27, a region RAR having a predetermined area or less is extracted and the region is strip-shaped. A reduction process for reducing in the width direction of the member is performed, and a reduction line AL is extracted (S146). The position data (FIG. 27) of the reduction line AL obtained in this way in the width direction of the strip-shaped member is handled as feature data.

  Subsequently, in the extracted feature data as shown in FIG. 27, a difference between the maximum value and the minimum value in the band member width direction is obtained (S147), and the value obtained in step S147 is compared with a predetermined threshold value ( S148), if it is equal to or less than the threshold, it is determined to be normal (S149), if it exceeds the threshold, it is determined to be abnormal (S150), and if it is abnormal, for example, the display device 72 performs a predetermined display (S151). In this case, the value obtained in step S147 is the amount of meandering in the width direction of the belt-shaped member.

  It is also possible to treat the entire feature data as shown in FIG. 27 as the meandering amount in the width direction of the belt-like member. In this case, the meandering amount in the width direction of the belt-like member is the length direction of the belt-like member. It is very effective in knowing how the external shape of the belt-like member changes in the length direction of the belt-like member because it can be easily and reliably grasped by the feature data. It is. Further, the value obtained in step S147 and how the amount of meandering in the width direction of the belt-like member changes in the length direction of the belt-like member (the circumferential direction of the forming drum) affects the LFD of the tire characteristics. give.

  As described above, according to the present embodiment, the feature data extracted from the inspection data indicates that the thickness of the strip member, the width direction end position of the strip member, and the like in the length direction of the strip member. Therefore, it is possible to know how the appearance of the belt-like member changes in the length direction of the belt-like member, which is extremely advantageous for improving tire characteristics.

  Next, the operation of the control device 70 when determining the splice amount between the lengthwise ends of the belt-like member will be described with reference to the flowchart of FIG. Note that the determination of the amount of splice between the longitudinal ends of the belt-shaped member is performed on the belt-shaped member such as a carcass member.

  When determining the amount of splice between the lengthwise ends of the strip-shaped member, first, the inspection data (image data subjected to luminance gradation processing in 256 gradations) created in step S9, for example, FIG. In the inspection data as shown, the data in the thickness direction of the belt-shaped member at a predetermined position P3 in the width direction of the belt-shaped member (for example, a position of 40 mm) is continuously determined in the length direction of the belt-shaped member (for example, the rotation direction of the forming drum) The average value of the luminance data is obtained by averaging in a range of 360 ° (S161). FIG. 29 shows the range of 20 ° in the direction of rotation of the forming drum. Further, for example, a range of ± 2 mm with respect to the average value obtained in step 161 (preferably a range of ± T / 3 or more and ± T or less with respect to the thickness T of the belt-like member) is gradation processed to 256 gradations (S162). ). As a result, the difference in luminance between the splice portion that is thicker than the other portions and the other portions is increased.

  Subsequently, by performing well-known edge emphasis processing using a Prewitt filter, a Sobel filter, or the like, or by extracting a range of a predetermined luminance or higher (for example, luminance of 25 or higher), as shown in FIG. The splice region AR is extracted (S163). At this time, since the area AR1 other than the splice part may be extracted as noise, the area reduction process for reducing the area to a certain extent or the process for deleting the area of a predetermined area or less is performed. As shown in FIG. 31, the area AR1 other than the area AR of the belt-shaped member is deleted (S164).

  Subsequently, the number of pixels in the band member length direction of the region AR is obtained at a predetermined position in the width direction of the band member (for example, the position of P3) (S165), the number of pixels in the band member length direction, and the rotation direction of the forming drum 1 From the angle and the radius of the forming drum 1, the dimension of the region AR in the longitudinal direction of the region AR at the predetermined position in the width direction is obtained (S166), and the value obtained in step S166 is compared with a predetermined threshold value (S167). If it is equal to or less than the threshold value, it is determined as normal (S168). If it exceeds the threshold value, it is determined as abnormal (S169). If abnormal, a predetermined display is performed by the display device 72 (S170). In this case, the value obtained in step S166 is the splice amount between the end portions in the length direction of the band-shaped member.

  Thus, according to the present embodiment, the amount of splice can be easily and reliably confirmed, which is extremely advantageous in improving tire characteristics. That is, in the past, there was no means for automatically and reliably confirming the amount of splice, so the operator confirmed it visually, and it took time to confirm and it was difficult to improve the accuracy of confirmation. However, according to the present embodiment, it takes less time to confirm the splice amount, and it is possible to improve the confirmation accuracy.

  In the present embodiment, the two-dimensional contour data continuously detected in the length direction of the belt-like member in the belt-like member wound around the forming drum 1 is shown. On the other hand, for example, at the stage where the belt-shaped member for molding the tire is placed on the plate before being wound around the molding drum 1, the two-dimensional contour data is obtained from the belt-shaped member in the length direction of the belt-shaped member. It is also possible to detect continuously and perform the same processing as described above on the detection result.

  In the present embodiment, each detection device 10 is configured by a two-dimensional displacement meter. However, instead of the two-dimensional displacement meter, a light source that irradiates slit light and slit light is irradiated to the belt-shaped member. It is also possible to provide an image pickup device for picking up the irradiation line and to detect two-dimensional contour data from the belt-like member by a known light cutting method.

  DESCRIPTION OF SYMBOLS 1 ... Molding drum, 10 ... Two-dimensional displacement meter, 20 ... Sensor bracket, 30 ... 1st base, 30a ... Ball screw, 30b ... Motor for base, 40 ... 2nd base, 41 ... Cylinder, 50 ... Rotary encoder, 51 ... Counter, 60 ... Origin detecting device, 70 ... Control device, 71 ... Storage device, 72 ... Display device, 73 ... Input device, B1 ... First belt member, B2 ... Second belt member.

Claims (18)

In the appearance shape inspection method of the band-shaped member for inspecting the appearance shape of the band-shaped member,
Using extraction means that can extract the contour of the outer shape of the belt-like member as two-dimensional contour data in the thickness direction of the belt-like member at a plurality of positions in the width direction of the belt-like member, the two-dimensional contour data of the outer shape of the belt-like member is A detection process for extracting at multiple points in the length direction;
An inspection data creation step for creating inspection data by arranging the two-dimensional contour data detected by the detection step in the length direction of the belt-shaped member;
From the inspection data created in the inspection data creation process, the appearance of the strip member indicating how the contour of the strip member indicated by each two-dimensional contour data changes in the length direction of the strip member. And a feature data extraction step for extracting feature data. In the detection step, the two-dimensional contour data of one surface in the thickness direction of the belt-shaped member in which a groove or a protrusion extending in the length direction is formed at a predetermined position in the width direction on one surface in the thickness direction is used as the length of the belt-shaped member. Configured to extract at multiple locations in the direction,
The feature data extraction step extracts the width direction position of the groove or protrusion of the strip member from the inspection data created in the inspection data creation step in a predetermined range continuous in the length direction of the strip member, Configure the extracted data as the feature data,
2. The external shape of the band-shaped member according to claim 1, further comprising a comparison step of obtaining a meandering amount in the width direction of the band-shaped member based on the characteristic data, and comparing the calculated amount of deflection with a predetermined threshold value. Inspection method. In the detection step, the two-dimensional contour data of one surface in the thickness direction of the belt-shaped member in which a groove or a protrusion extending in the length direction is formed at a predetermined position in the width direction on one surface in the thickness direction is used as the length of the belt-shaped member. Configured to extract at multiple locations in the direction,
After arranging the two-dimensional contour data detected by the detecting step in the length direction of the strip-shaped member in the inspection data creation step, the data in each thickness direction of the arranged two-dimensional contour data is used as a predetermined color standard. The gradation processing is performed based on the image data composed of the data in each thickness direction subjected to the gradation processing.
The feature data extraction step extracts the width direction position of the groove or protrusion of the strip member from the inspection data created in the inspection data creation step in a predetermined range continuous in the length direction of the strip member, Configure the extracted data as the feature data,
2. The external shape of the band-shaped member according to claim 1, further comprising a comparison step of obtaining a meandering amount in the width direction of the band-shaped member based on the characteristic data, and comparing the calculated amount of deflection with a predetermined threshold value. Inspection method. In the feature data extraction step, the position, half-width, or full-width data of the width direction end of the band-shaped member from the inspection data created in the inspection data creation step is continuous within a predetermined range in the length direction of the band-shaped member. Extracting and configuring the extracted data as the feature data;
2. The external shape of the band-shaped member according to claim 1, further comprising a comparison step of obtaining a meandering amount in the width direction of the band-shaped member based on the characteristic data, and comparing the calculated amount of deflection with a predetermined threshold value. Inspection method. After arranging the two-dimensional contour data detected by the detecting step in the length direction of the strip-shaped member in the inspection data creation step, the data in each thickness direction of the arranged two-dimensional contour data is used as a predetermined color standard. The gradation processing is performed based on the image data composed of the data in each thickness direction subjected to the gradation processing.
In the feature data extraction step, the position, half-width, or full-width data of the width direction end of the band-shaped member from the inspection data created in the inspection data creation step is continuous within a predetermined range in the length direction of the band-shaped member. Extracting and configuring the extracted data as the feature data;
The appearance inspection of the band-shaped member according to claim 1, further comprising a comparison step of obtaining a meandering amount in the width direction of the band-shaped member based on the feature data and comparing the obtained amount of deflection with a predetermined threshold value. Method. The feature data extracting step is a predetermined range in which the data in the thickness direction of the belt-shaped member at a predetermined position in the width direction of the belt-shaped member is continuously in the length direction of the belt-shaped member from the data for inspection created in the data creation step for inspection. And extracting the extracted data as the feature data,
The appearance of the band-shaped member according to claim 1, further comprising a comparison step of obtaining a deflection amount in the thickness direction of the strip-shaped member based on the feature data, and comparing the determined deflection amount with a predetermined threshold value. Shape inspection method. After arranging the two-dimensional contour data detected by the detecting step in the length direction of the strip-shaped member in the inspection data creation step, the data in each thickness direction of the arranged two-dimensional contour data is used as a predetermined color standard. The gradation processing is performed based on the image data composed of the data in each thickness direction subjected to the gradation processing.
The feature data extracting step is a predetermined range in which the data in the thickness direction of the belt-shaped member at a predetermined position in the width direction of the belt-shaped member is continuously in the length direction of the belt-shaped member from the data for inspection created in the data creation step for inspection. And extracting the extracted data as the feature data,
The appearance of the band-shaped member according to claim 1, further comprising a comparison step of obtaining a deflection amount in the thickness direction of the strip-shaped member based on the feature data, and comparing the determined deflection amount with a predetermined threshold value. Inspection method. 8. The method according to claim 4, further comprising a determination step of determining the presence or absence of a belt-like member by comparing an average value of data in each thickness direction of the feature data with a predetermined threshold value. The appearance inspection method of the strip-shaped member as described in 2. Based on the feature data extracted by the feature data extraction step, the amount of deflection in the thickness direction of the strip member and / or the amount of meandering in the width direction of the strip member is obtained, and the comparison is performed by comparing the obtained amount with a predetermined threshold value. The method according to claim 1, further comprising a step. In the appearance shape inspection device for the band-shaped member for inspecting the appearance shape of the band-shaped member,
Detecting means for detecting the outline of the outer shape of the belt-like member as two-dimensional contour data in the thickness direction of the belt-like member at a plurality of positions in the width direction of the belt-like member;
Inspection data creation means for creating inspection data by arranging the two-dimensional contour data detected by the detection means in the length direction of the belt-shaped member;
From the inspection data created by the inspection data creation means, the appearance of the belt-shaped member indicating how the contour of the belt-shaped member indicated by each two-dimensional contour data changes in the length direction of the belt-shaped member. An apparatus for inspecting the appearance of a belt-like member, comprising: feature data extracting means for extracting feature data. The detection means uses the two-dimensional contour data of one surface in the thickness direction of the belt-shaped member formed with a groove or projection extending in the length direction at a predetermined position in the width direction on one surface in the thickness direction. Configured to extract at multiple locations in the direction,
The feature data extraction unit extracts the width direction position of the groove or the protrusion of the strip member from the inspection data created by the inspection data creation unit in a predetermined range continuous in the length direction of the strip member, Configure the extracted data as the feature data,
The external shape of the band-shaped member according to claim 10, further comprising a comparison unit that calculates a meandering amount in the width direction of the band-shaped member based on the characteristic data and compares the calculated amount of deflection with a predetermined threshold value. Inspection device. The detection means uses the two-dimensional contour data of one surface in the thickness direction of the belt-shaped member formed with a groove or projection extending in the length direction at a predetermined position in the width direction on one surface in the thickness direction. Configured to extract at multiple locations in the direction,
The inspection data creation means arranges the two-dimensional contour data detected by the detection means in the length direction of the belt-like member, and then uses the data in each thickness direction of the arranged two-dimensional contour data as a predetermined color standard. The gradation processing is performed based on the image data composed of the data in each thickness direction subjected to the gradation processing.
The feature data extraction unit extracts the width direction position of the groove or the protrusion of the strip member from the inspection data created by the inspection data creation unit in a predetermined range continuous in the length direction of the strip member, Configure the extracted data as the feature data,
The external shape of the band-shaped member according to claim 10, further comprising a comparison unit that calculates a meandering amount in the width direction of the band-shaped member based on the characteristic data and compares the calculated amount of deflection with a predetermined threshold value. Inspection device. The feature data extracting means is configured to obtain the position, half width, or full width data of the end in the width direction of the belt-like member from the inspection data created by the inspection data creating means in a predetermined continuous range in the length direction of the belt-like member. Extracting and configuring the extracted data as the feature data;
The external shape of the band-shaped member according to claim 10, further comprising a comparison unit that calculates a meandering amount in the width direction of the band-shaped member based on the characteristic data and compares the calculated amount of deflection with a predetermined threshold value. Inspection device. The inspection data creation means arranges the two-dimensional contour data detected by the detection means in the length direction of the belt-like member, and then uses the data in each thickness direction of the arranged two-dimensional contour data as a predetermined color standard. The gradation processing is performed based on the image data composed of the data in each thickness direction subjected to the gradation processing.
The feature data extracting means is configured to obtain the position, half width, or full width data of the end in the width direction of the belt-like member from the inspection data created by the inspection data creating means in a predetermined continuous range in the length direction of the belt-like member. Extracting and configuring the extracted data as the feature data;
11. The appearance inspection of the band-shaped member according to claim 10, further comprising a comparison unit that calculates a meandering amount in the width direction of the band-shaped member based on the feature data, and compares the calculated amount of deflection with a predetermined threshold value. apparatus. The feature data extracting means converts the data in the thickness direction of the belt-like member at a predetermined position in the width direction of the belt-like member from the inspection data created by the inspection data creating means into a predetermined range in the length direction of the belt-like member. And extracting the extracted data as the feature data,
The appearance of the band-shaped member according to claim 10, further comprising a comparison unit that obtains a deflection amount in the thickness direction of the strip-shaped member based on the feature data and compares the calculated deflection amount with a predetermined threshold value. Shape inspection device. The inspection data creation means arranges the two-dimensional contour data detected by the detection means in the length direction of the belt-like member, and then uses the data in each thickness direction of the arranged two-dimensional contour data as a predetermined color standard. The gradation processing is performed based on the image data composed of the data in each thickness direction subjected to the gradation processing.
The feature data extracting means converts the data in the thickness direction of the belt-like member at a predetermined position in the width direction of the belt-like member from the inspection data created by the inspection data creating means into a predetermined range in the length direction of the belt-like member. And extracting the extracted data as the feature data,
The appearance of the band-shaped member according to claim 10, further comprising a comparison unit that obtains a deflection amount in the thickness direction of the strip-shaped member based on the feature data and compares the calculated deflection amount with a predetermined threshold value. Inspection device. The determination means which determines the presence or absence of a strip | belt-shaped member by comparing the average value of the data of each thickness direction of characteristic data with a predetermined threshold value, The any one of Claim 13, 14, 15 or 16 characterized by the above-mentioned. 2. An appearance inspection apparatus for the band-shaped member according to 1. Based on the feature data extracted by the feature data extraction means, the amount of deflection in the thickness direction of the strip member and / or the amount of meandering in the width direction of the strip member is obtained, and the comparison is performed by comparing the obtained amount with a predetermined threshold value. The strip-shaped member appearance shape inspection apparatus according to claim 10, further comprising means.