JP5869230B2 - Method and apparatus for measuring seam shape of strip member - Google Patents

Description

  The present invention relates to, for example, a method and apparatus for measuring the shape of a seam of a belt-like member such as a carcass ply, and a displacement measuring device suitably used for measuring the shape of a seam of a belt-like member.

Conventionally, as a device for measuring the length of a belt-shaped tire constituent member such as a carcass ply wound around a molding drum, a belt-shaped member using a two-dimensional displacement sensor as shown in FIGS. Is known (see, for example, Patent Document 1).
The length measuring device 30 includes a laser light source 31a that irradiates a line-shaped laser beam and a CCD camera 31b that receives a laser beam reflected from the surface of the object to be measured and images a laser beam irradiation portion. From the two-dimensional displacement sensor 31 provided with the displacement amount measuring means 31c for measuring the displacement amount of the surface of the object to be measured, the belt-shaped tire constituent member 42 attached to the molding drum 41 rotating at a predetermined speed is used. While irradiating a line beam inclined at a predetermined angle with respect to the longitudinal direction of the tire constituent member 42, the reflected light from the irradiated portion of the tire constituent member 42 is received to obtain an image of the irradiated portion, and a displacement measuring means 32, the positions of the start end 42a and the end end 42b of the tire constituent member 42 obtained by measuring the amount of displacement of the tire constituent member 42 from the surface of the molding drum 41 from the image of the irradiated portion. Calculating the length of Luo tire component 42.
The two-dimensional displacement sensor 31 changes the direction of the reflected light when there is a step portion of the tire constituent member 42 in the laser light irradiation portion. By detecting the position of the step, the two-dimensional displacement sensor 31 detects the positions of the start end 42a and the end end 42b. The position can be detected.
At this time, the encoder 33 is attached to the molding drum 41 and the control means 34 is provided, and the detection result of the two-dimensional displacement sensor 31 is sampled every time the molding drum 41 rotates by a predetermined angle. If the step portion is repeatedly detected, position information in the width direction of the step portion of the tire constituent member 42 can be obtained.

WO 2006/019070 A1

By the way, in order to prevent the seam of the tire constituent member 42 wound in a cylindrical shape from being opened when the molding drum 41 is widened in a subsequent process, the seam is crimped. The crimping of the seam is performed by an operator who presses the seam part with a pressure roller and retouches it, or automatically moves along the seam while pressing the pressure roller rotatably mounted on the roller holder. This is done using a device.
Further, when the convex amount (joint amount) of the seam of the tire constituent member 42 is small or when a part of the seam is floating, the seam may be opened in a later process. It was necessary to inspect the shape.

Conventionally, the convex amount of the seam is calculated from the length of the strip-shaped tire constituent member 42 measured by the length measuring device 30 before crimping, and whether or not the seam is likely to open from the calculated convex amount of the seam. However, it is difficult to accurately determine whether or not the seam opens from the convex amount of the seam because the seam may be displaced from the state before the seam by pressure bonding.
In addition to the determination based on the convex amount of the seam, an operator also visually checked the state of the seam after crimping. From the appearance, the position of the lower side of the seam (the position of the start end) after crimping ) Is unknown, it was difficult to accurately inspect the joint shape.
Although it is conceivable to measure the convex amount of the seam again after crimping, if the side of the tire constituent member 42 is floating when the molding drum 41 is photographed in a stationary state, the relationship of the optical path of the laser beam Therefore, it was necessary to rotate the molding drum 41 and photograph the joint portion at different angles a plurality of times.

The present invention has been made in view of the conventional problems, without moving the measuring device or strip, and to provide a seam shape of the belt-shaped member and a method to accurately measure the equipment .

The invention according to claim 1 of the present application uses a laser irradiation means for irradiating a laser beam to irradiate a line-shaped laser beam at the joint of the belt-shaped member, and irradiates the laser beam irradiation part (a line on which the laser beam is applied). Image of the band-shaped part) with a photographing means, measure the unevenness of the seam of the band-shaped member from the data of the captured image, and based on the measured amount of unevenness, the shape of the seam of the band-shaped member A method for measuring a joint shape of a band-shaped member to be measured, wherein the band-shaped member is a treat member in which a cord is covered with treat rubber, and the laser beam is applied in a normal direction of the band-shaped member (perpendicular to the surface of the band-shaped member). A direction inclined by 45 ° to 65 ° with respect to the longitudinal direction of the laser beam, and the extension direction of the cord is orthogonal to the longitudinal direction of the belt-like member, Irradiating from a direction in which the longitudinal direction of the belt-like member is parallel, and when the extension direction of the cord intersects the longitudinal direction of the belt-like member without being orthogonal, the extension direction of the laser light line and the extension direction of the cord The first optical element for irradiating from the direction orthogonal to the image and imaging the specularly reflected light from the band-shaped member on the photographing means, or the method of the band-shaped member out of the scattered light of the laser light A second optical element that forms an image of the front scattered light, which is scattered light in a linear direction, on the imaging unit, or both the first optical element and the second optical element are provided, An image of specular reflection light and an image of front scattered light are photographed, and a joint shape of the belt-shaped member is measured using the photographed image of specular reflection light and the image of front scattered light. To do.
Thereby, since the image which looked at the joint of the strip | belt-shaped member from two directions of the upper surface side and the front surface side can be obtained, even when a shadow generate | occur | produces in the joint of the strip | belt-shaped member, the shape of the joint can be measured with high accuracy. .
In other words, the surface of the treating member has irregularities such that the portion where the cord is inside is a convex portion and the portion where no cord is inside is a concave portion, and the valley portion and the inclined portion are uneven. Therefore, as in the present invention, if the laser beam is irradiated so that the incident angle of the laser beam is 45 ° to 65 ° and the extension direction of the laser beam line and the extension direction of the cord are orthogonal to each other, Since the reflected light from the portion and the reflected light from the inclined portion can be received effectively, an image with good luminance can be obtained, and the measurement accuracy of the joint shape can be improved.
In addition, by measuring the shape of the seam using the image on the upper surface side and the image on the front surface in this way, the difference in height between the start end and the end of the seam can be obtained with high accuracy. Whether or not the cord at the rear end is located at the tip (whether or not only the rubber covering the cord is extended) can also be reliably determined.

The invention according to claim 2 irradiates the line-shaped laser light at the joint of the belt-shaped member using the laser irradiation means for irradiating the laser light, and takes an image of the laser light irradiation portion with the photographing means. The belt-shaped member seam shape measuring method for measuring the amount of unevenness of the seam of the belt-shaped member from the imaged image data, and measuring the shape of the seam of the belt-shaped member based on the measured amount of unevenness, The belt-like member is a treat member in which a cord is covered with treat rubber, and the laser beam is inclined at 45 ° to 65 ° with respect to the normal direction of the belt-like member, and the cord is extended. When the direction is orthogonal to the longitudinal direction of the belt-shaped member, irradiation is performed from a direction in which the extending direction of the laser beam line and the longitudinal direction of the belt-shaped member are parallel, and the extending direction of the cord is the front When intersecting without orthogonal to the longitudinal direction of the strip-shaped member, irradiation is performed from a direction in which the extending direction of the laser beam line and the extending direction of the cord are orthogonal to each other, and the regular reflection light from the strip-shaped member is emitted from the imaging unit A first optical element that forms an image on the surface, or a plane perpendicular to a plane formed by incident light and specularly reflected light of the scattered light of the laser light or a plane including the perpendicular direction A third optical element that forms side-scattered light, which is scattered light scattered in a direction intersecting with the plane, on the imaging unit, or the first optical element and the third optical element. Both of the elements are provided to capture the image by the regular reflection light and the image by the side scattered light, and use the photographed image by the regular reflection light and the image by the side scattered light to joint the band-shaped member Measure shape Characterized in that it.
Thereby, since the image which looked at the joint of the strip | belt-shaped member from two directions of the upper surface side and the side surface side can be obtained, even when a shadow generate | occur | produces in the joint of the strip | belt-shaped member, the shape of the joint can be measured with high accuracy. At the same time, the incident angle of the laser beam is set to 45 ° to 65 °, the laser beam is irradiated so that the extending direction of the laser beam line and the extending direction of the cord are orthogonal to each other, and the reflected light and the inclination from the uneven valley Since the reflected light from the portion can be received effectively, an image with good luminance can be obtained, and the measurement accuracy of the joint shape can be improved.
Also, by using an image photographed from the side, it is possible to accurately measure the presence or absence of a gap between the start and end of the seam, so whether or not the seam opens when the diameter of the molding drum is expanded. Can be reliably determined.

The invention according to claim 3 irradiates a line-shaped laser beam at the joint of the belt-shaped member using a laser irradiation unit that irradiates a laser beam, images an image of the laser beam irradiation part with the imaging unit, A method for measuring a seam shape of a belt-like member, which measures the amount of unevenness of a seam of the belt-like member from data of a photographed image, and measures the seam shape of the belt-like member based on the measured amount of unevenness, The belt-like member is a treat member in which a cord is covered with treat rubber, and the laser beam is inclined at 45 ° to 65 ° with respect to the normal direction of the belt-like member, and the extension direction of the cord is When orthogonal to the longitudinal direction of the belt-shaped member, irradiation is performed from a direction in which the extending direction of the laser beam line and the longitudinal direction of the belt-shaped member are parallel, and the extending direction of the cord is the belt-shaped When intersecting without being orthogonal to the longitudinal direction of the member, irradiation is performed from a direction in which the extension direction of the laser light line and the extension direction of the cord are orthogonal to each other, and the photographing unit is configured to transmit the regular reflection light from the belt-shaped member. Reflection direction, reflection direction of front scattered light that is scattered light in the normal direction of the strip-shaped member of the scattered light of the laser light, or incident light of the laser light of the scattered light of the laser light and Installed in one of the reflection directions of the side scattered light that is scattered light in the direction perpendicular to the plane formed by the specularly reflected light or the direction that intersects the plane in the plane that includes the perpendicular direction. In addition, an optical element that forms an image on the imaging unit of laser light reflected or scattered in a direction other than the direction in which the imaging unit is installed is provided. An image and an image of the side scattered light are photographed, and a joint shape of the belt-like member is measured using the photographed image of the specularly reflected light, the image of the front scattered light, and the image of the side scattered light. It is characterized by.
As a result, the image of the seam seen from three directions can be obtained with a single photographing means, so that the shape of the seam can be accurately measured and the incident angle of the laser beam is set to 45 ° to 65 °. By irradiating the laser beam so that the extension direction of the laser beam line and the extension direction of the cord are orthogonal, the reflected light from the concave and convex valleys and the reflected light from the inclined part can be received effectively. Therefore, an image with good luminance can be obtained. Therefore, it can be reliably determined whether or not the state of the seam of the belt-like member is normal.

The invention described in claim 4 is an apparatus (apparatus for measuring a band-shaped treat member in which a cord is covered with treat rubber) for realizing the method for measuring the shape of a joint of the band-shaped member according to claim 3. A laser irradiating means for irradiating a line-shaped laser beam at the joint of the belt-shaped member; and a photographing means for receiving a reflected light from the belt-shaped member of the laser light and capturing an image of the laser light irradiation portion; A concavo-convex amount measuring means for measuring the concavo-convex amount of the seam of the belt-shaped member from the image, and a shape measuring means for measuring the joint shape of the belt-shaped member based on the concavo-convex amount measured by the concavo-convex amount measuring means An optical element that reflects the reflected light of the laser light from the belt-shaped member (either specularly reflected light or scattered light), and the laser irradiation means is arranged in a direction normal to the belt-shaped member. In 45 ° to 65 ° inclined direction Te, and if the extending direction of the cord is perpendicular to the longitudinal direction of the belt-shaped member, the longitudinal extension direction and the belt-shaped member of the line of the laser beam is parallel Irradiating from the direction, and when the extension direction of the cord intersects the longitudinal direction of the strip member without being orthogonal, the irradiation direction from the direction in which the extension direction of the laser light line and the extension direction of the cord are orthogonal, The imaging means is a reflection direction of specularly reflected light from the band-shaped member, a reflection direction of front scattered light that is scattered light in a normal direction of the band-shaped member of the scattered light of the laser light, or the laser light Of the scattered light, the side scattered light that is scattered in the direction perpendicular to the plane formed by the incident light of the laser light and the specularly reflected light or in the direction intersecting the plane in the plane including the perpendicular direction. It is installed in any one of the reflection directions of light, and the optical element is arranged so as to image reflected light or scattered light other than laser light reflected in the direction of the photographing means, respectively, on the photographing means, The unevenness measuring means measures the unevenness of the seam of the belt-like member using the image by the regular reflection light, the image by the front scattered light and the image by the side scattered light taken by the photographing means. It is characterized by.
Thereby, it is possible to provide a seam shape measuring device for a belt-like member that can accurately measure the shape of the seam. Moreover, if the seam shape measuring device for a belt-shaped member of the present invention is used, it can be reliably determined whether or not the state of the seam is normal.

  The summary of the invention does not list all necessary features of the present invention, and sub-combinations of these feature groups can also be the invention.

It is a figure which shows the outline | summary of the joint shape measuring apparatus of the strip | belt-shaped member which concerns on embodiment of this invention. It is a figure which shows the structure of a displacement measuring device. It is a figure which shows the image of an irradiation part. It is a figure which shows the relationship between the irradiation direction of a laser beam, reflected light, and scattered light. It is a figure for demonstrating arrangement | positioning of a laser, a camera, and an optical element when image | photographing the ply from which the longitudinal direction of a strip | belt-shaped member and the extension direction of a cord differ. It is a figure which shows the length measuring apparatus of the strip | belt-shaped member using the conventional two-dimensional displacement sensor.

  Hereinafter, the present invention will be described in detail through embodiments, but the following embodiments do not limit the invention according to the claims, and all combinations of features described in the embodiments are included. It is not necessarily essential for the solution of the invention.

FIG. 1 is a diagram showing an outline of a belt-shaped member seam shape measuring apparatus (hereinafter referred to as a seam shape measuring apparatus) 10 according to the present embodiment, and FIG. 2 is a diagram showing a configuration of a displacement amount measuring apparatus 11.
The joint shape measuring apparatus 10 includes a displacement amount measuring device 11 including a laser irradiation means 12, a photographing means 13, first and third optical elements 14 and 15, and a displacement amount measuring means 16, a joint shape measuring means 17, And a crimping failure determining means 18.
In FIG. 1, reference numeral 20 denotes a carcass ply wound around the molding drum 19, reference numeral 21 denotes a seam of the carcass ply 20, reference numeral 21a denotes a start end, and reference numeral 21b denotes a termination end.
At the time of measurement, the molding drum 19 is assumed to be stationary.
The displacement measuring device 11 is installed on the winding start side of the carcass ply 20.

Here, when the extending direction of the cord 20C of the carcass ply 20 of the present example is set to a direction orthogonal to the longitudinal direction of the carcass ply 20, the laser irradiation means 12 is formed on the surface of the carcass ply 20 on the line of FIGS. A line beam indicated by L and extending in a direction parallel to the longitudinal direction of the carcass ply 20 is arranged so as to be irradiated from a critical angle (about 45 °) at which the amount of reflected light is the largest. That is, the laser irradiation means 12 is indicated by an arrow m _c in FIG. 2, the carcass ply 20 with a laser beam extending in a direction orthogonal to the extending direction of the cord 20C of the carcass ply 20 (line light) L, the incident angle of 45 ° Irradiate the surface.
The first optical element 14 is in front of the carcass ply 20, that is, in a plane formed by the incident light I of the laser light and the normal line n of the carcass ply 20, and the direction of the incident light I with respect to the normal line n The specularly reflected light R _2, which is arranged on an extension in a direction symmetrical to the line and reflected from the surface of the carcass ply 20, is imaged on the photographing means 13.
The third optical element 15 is disposed on the side surface of the carcass ply 20, that is, in a plane parallel to the plane formed by the incident light I of the laser beam and the normal line of the carcass ply 20, and is reflected on the surface of the carcass ply 20. Of the scattered light, the side scattered light R ₃ which is scattered light directed toward the parallel plane is imaged on the photographing means 13.
In this example, each of the first and third optical elements 14 and 15 is a prism.
In the present invention, only two optical elements are used. That is, the displacement measuring device 11 of this example does not require the second optical element that forms an image on the imaging unit 13 with the front scattered light that is scattered light in the normal n direction of the scattered light of the laser light, As the optical element, only the first and third optical elements 14 and 15 are provided.

The imaging means 13 is scattered light in the normal direction of the carcass ply 20 that is arranged in the normal direction of the carcass ply 20 so that the optical axis is in the normal direction of the carcass ply 20. The front scattered light R ₁ is directly received and imaged, and the regular reflected light R ₂ from the first optical element 14 and the side scattered light R ₃ from the third optical element 15 are received and imaged. Let
In this way, the photographing means 13 receives the front scattered light R ₁ , the specularly reflected light R _2, and the side scattered light R _3, and forms a light receiving surface (not shown) in which light receiving elements such as CCD elements are two-dimensionally arranged. since focusing, for example, as shown in FIG. 3, the upper surface image G ₁ is an image by front scattered light R ₁ of the carcass ply 20, regularly reflected light front image G ₂ is an image by R ₂ and the side scattered light A side image G ₃ that is an image of R ₃ can be obtained.
In this example, since the installed displacement measuring device 11 to the winding start side of the carcass ply 20, precision image and a top image G ₁ and the front image G ₂ and the side image G ₃ seams 21 of the carcass ply 20 I can shoot well.
That is, in the displacement measuring apparatus 11 according to the present invention, a top image obtained by installing the photographing means 13 in the reflection direction of the front scattered light R ₁ as shown in FIG. In addition to G ₁ , a front image G ₂ that is the same image as the image obtained by installing the photographing means 13 ′ in the reflection direction of the regular reflection light R ₂ as shown in FIG. ), A side image G ₃ that is the same image as the image obtained by installing the photographing means 13 ″ in the reflection direction of the side scattered light R ₃ can be obtained.

The displacement amount measuring means 16 that is the unevenness measuring means is viewed from the three directions of the joint 21 of the carcass ply 20 using the top image G ₁ , the front image G _2, and the side image G ₃ taken by the photographing means 13. Measure the shape. Specifically, the longitudinal direction of the carcass ply 20 is the x-axis, the width direction is the y-axis, the thickness direction (normal direction) is the z-axis, and the surface of the molding drum 19 without the carcass ply 20 has a displacement amount. Assuming that the origin is the displacement h ₁ (x _k , y _k ) measured using the top image G ₁ , the displacement h ₂ (x _k , y _k ) measured using the front image G ₂ and the side image G _3. The displacement amounts h ₃ (x _k , y _k ) measured using the above are the thicknesses of the seams 21 when the carcass ply 20 is viewed from the top, front, and side surfaces. Therefore, as will be described later, it is possible to interpolate the displacement amount of the part that has become a shadow when viewed from one azimuth with the displacement amount measured from the image viewed from the other azimuth. Shape can be obtained.
Note that (x _k , y _k ) is the coordinates of the irradiated laser beam, the range of x _k is the length of the line-shaped laser beam, and y _k is the position of the joint shape measuring apparatus 10 (laser beam). Center position).

The seam shape measuring means 17 connects, for example, the displacement h ₂ (x _k , y _k ) in the front image with high luminance in the longitudinal direction of the carcass ply 20 and, in the upper surface image, the portion that cannot be measured due to the shadow. displacement _{h 1 (x k, y k} ) displacement at the side surface image _{h 3 (x k, y k} ) the amount of displacement of the joint portion is hitting by interpolating the linear laser light at h (x _k, y _k ) to determine the shape of the seam.
As shown in FIG. 1, the displacement amount h ₁ (x, y), the displacement amount h ₂ (x, y), and the displacement are measured while the seam shape measuring device 10 is moved in the y direction that is the width direction of the carcass ply 20. If the amount h ₃ (x, y) is measured, the three-dimensional shape of the joint portion of the carcass ply 20 can be obtained.
The crimping failure determination means 18 determines the quality of the seam 21 by comparing the three-dimensional shape of the seam portion measured by the seam shape measuring means 17 with a preset irregularity standard of the seam 21.
When there is a possibility that the seam 21 may be opened in a later process, or when the seam 21 has already been opened after pressure bonding, it is determined as a defective product.
FIG. 1 illustrates the case where the end of the carcass ply 20 is overlapped, that is, the case where the convexity that is the overlap amount of the joint 21 is measured to determine whether the joint 21 is good or bad. When there is a gap between the terminal 21a and the terminal end 21b, the concave amount of the joint 21 which is the size of the gap is obtained to determine whether the joint 21 is good or bad.

Next, a method for measuring the seam shape of the carcass ply 20 using the seam shape measuring apparatus 10 of this example will be described.
First, the joint shape measuring apparatus 10 is arranged so that laser light is irradiated on the surface of the carcass ply 20 wound around the molding drum 19 at an incident angle of 45 °. Then, the laser irradiation means 12 irradiates the surface of the carcass ply 20 with line light extending in a direction perpendicular to the extending direction of the cord 20C of the carcass ply 20. The irradiation range of the line light includes the start end 21 a and the end end 21 b of the carcass ply 20.
Of the reflected light of the laser light reflected on the surface of the carcass ply 20, the reflected light (front scattered light R ₁ ) reflected in the normal direction of the carcass ply 20 is directly incident on the imaging means 13. Further, the regular reflection light R ₂ having a reflection angle of 45 ° is reflected by the first optical element 14 and enters the photographing means 13, and the side scattered light R ₃ reflected in the side surface direction of the carcass ply 20 is the third reflection light R ₃ . Are reflected by the optical element 15 and received by the photographing means 13. Thus, the light receiving surface of the imaging unit 13 includes a top surface image G ₁ is an image by front scattered light R ₁ of the carcass ply 20, front image G ₂ by specularly reflected light R ₂ is an image and the side scattered light R ₃ A side image G ₃ , which is an image of the above, is formed.

In the joint shape measuring apparatus 10 of this example, the irradiation unit including the joint part of the carcass ply 20 is viewed from three directions using the top image G ₁ , the front image G _2, and the side image G ₃ photographed by the photographing unit 13. After determining the displacement amount h ₁ (x _k , y _k ), displacement amount h ₂ (x _k , y _k ) and displacement amount h ₃ (x _k , y _k ) in the front image with the highest luminance. Using the displacement amount h ₂ (x _k , y _k ), the thickness h (x _k , y _k ) of the irradiated portion of the carcass ply 20 is _obtained . At this time, portions that can not be measured in shade, specifically, the displacement amount _{h 2 (x k, y k} ) For locations has not been determined, the displacement amount _{h 2 (x k, y k} ) instead of the amount of displacement _{h 1 (x k, y k} ) in the top image G ₁ and the displacement amount h ₃ at the side surface image _{G 3 (x k, y k} ) thickness h (x _k of the irradiator, y _k ) Is used to interpolate the missing portion of the displacement h ₂ (x _k , y _k ) at the location that cannot be measured due to the shadow.
Then, the displacement shape h ₁ (x, y) and the displacement amount h ₂ (x, y) are moved while the seam shape measuring device 10 is moved in the y direction which is the width direction of the carcass ply 20 as shown by the arrow in FIG. ) And the displacement amount h ₃ (x, y) are measured, and the three-dimensional shape of the seam portion of the carcass ply 20 is measured.

When determining whether or not the seam shape of the carcass ply 20 is good, the three-dimensional shape of the seam portion is compared with a preset irregularity standard of the seam, and whether or not there is a possibility that the seam 21 may be opened in a later process. Determine.
Specifically, when the end 21b of the carcass ply 20 covers the wound carcass ply 20, if the thickness of the carcass ply 20 is D, the displacement h (x _k , y _k ) is approximately 2D. It becomes. When the displacement amount h (x _k , y _k ) is 2D (length in the x direction) is less than a preset convex amount (for example, 0.6 mm), the rear end of the carcass ply 20 It is determined that the code of the part does not reach the tip of the start end 21a and is defective.
Further, when the carcass ply 20 is not accurately crimped and the side of the joint 21 is in a floating state, a dent is formed in the image. In this case, when the thickness of the carcass ply 20 is D, the displacement h (x _k , y _k ) is substantially 0 (the surface of the molding drum 19). When the length (length in the x direction) at which the displacement amount h (x _k , y _k ) is 0 is larger than a preset concave amount (for example, 0.5 mm), the start end 21a of the joint 21 It is determined that there is a gap between the terminal 21b and the terminal 21b.

As described above, in the present embodiment, the laser irradiation means 12 irradiates the surface of the carcass ply 20 with the line light extending in the direction orthogonal to the extending direction of the cord of the carcass ply 20 at an incident angle of 45 °, and the reflected light. The _first scattered light R ₁ is directly received by the photographing means 13, the specularly reflected light R ₂ is reflected by the first optical element 14, and the side scattered light R ₃ is reflected by the third optical element 15, respectively. in the structure to be received in the means 13, by the front scattered light R and the upper surface image G ₁ is an image by _1, front image G ₂ is an image by regularly reflected light R ₂ and the side scattered light R ₃ of the carcass ply 20 When a side image G _{3 as} an image is photographed, and the irradiated portion including the joint portion of the carcass ply 20 is viewed from three directions using the photographed top image G ₁ , front image G _2, and side image G _3. Displacement h ₁ (x _k , y _k ), h ₂ (X _k , y _k ) and h ₃ (x _k , y _k ) are obtained, and the displacements h ₁ (x _k , y _k ), h ₂ (x _k , y _k ) and h ₃ (x _k , y _Since the thickness of the irradiated portion of the carcass ply 20 is obtained using _k ), the shape of the joint portion of the carcass ply 20 can be measured with high accuracy.
Therefore, by comparing the measured three-dimensional shape of the seam portion with a preset unevenness standard of the seam, it is possible to appropriately determine whether or not the seam 21 may be opened in a subsequent process. .

In the above embodiment, the shape of the joint portion of the carcass ply 20 is measured using the top image G ₁ , the front image G _2, and the side image G ₃ , but the top image G ₁ and the front image G ₂ , or Even if the front image G ₂ and the side image G ₃ are used, the shape of the joint portion can be measured with high accuracy.
In this case, since the front scattered light R ₁ and the regular reflected light R ₂ , or the regular reflected light R ₂ and the side scattered light R ₃ are used, as the optical element, the first optical element 14 or Both the first optical element 14 and the third optical element 15 are used. It is possible to use only the third optical element 15 as an optical element and measure the shape of the seam portion of the carcass ply 20 from the top image G ₁ and the side image G ₃ . It is preferable to use the front image G ₂ , which is an image of the high regular reflection light R _2, because the accuracy becomes higher.
In the above example, the photographing means 13 is installed in the reflection direction of the front scattered light R ₁ , but it may be installed in the reflection direction of the regular reflection light R ₂ or the reflection direction of the side scattered light R ₃ . In this case, it goes without saying that the other reflected light is imaged on the photographing means 13 using an optical element.
In the above example, the shape of the joint portion of the carcass ply 20 is measured while the molding drum 19 is stationary. However, the shape may be measured by rotating the molding drum 19. In this case, since the seam 21 of the carcass ply 20 rotates in the circumferential direction of the molding drum 19, it is sufficient to capture only the front image G ₂ and the side image G ₃ .

Further, the measurement object of the present invention is not limited to the carcass ply 20 but can be applied to a belt-shaped tire constituent member such as a belt or a tread.
In addition, when the belt-shaped tire constituent member is a treat member, it is preferable that the incident angle of the laser beam is 45 ° to 65 °. Thereby, since the brightness | luminance of regular reflection light can fully be ensured, the measurement precision of a joint shape can be improved. At this time, it is preferable to irradiate the laser light so that the extending direction of the line light is perpendicular to the cord of the treating member. That is, in the belt or the like, the extension direction of the cord intersects the longitudinal direction (winding direction), but in this case, the laser beam is not in the direction orthogonal to the longitudinal direction of the belt 25 as shown in FIG. Irradiate in a direction orthogonal to
Moreover, in the said example, although the 1st and 3rd optical elements 14 and 15 were each comprised with the prism, you may comprise by combining a some mirror.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the embodiment. It is apparent from the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

  According to the present invention, the shape of the seam of the belt-like member can be easily and accurately measured with a simple configuration, so that the quality of the seam can be determined efficiently.

10 Joint shape measuring device for belt-shaped member, 11 Displacement measuring device,
12 laser irradiation means, 13 photographing means, 14 first optical element,
15 third optical element, 16 displacement amount measuring means, 17 joint shape measuring means,
18 Crimping failure judgment means, 19 molding drum, 20 carcass ply,
21 Seam, 21a start, 21b end.

Claims (4)

Using a laser irradiation means for irradiating laser light, irradiate a line-shaped laser light at the joint of the belt-like member, take an image of the laser light irradiation portion with an imaging means, and use the data of the taken image to form the belt-like shape A method for measuring a seam shape of a band-shaped member, which measures the amount of unevenness of a seam of a member, and measures the seam shape of the band-shaped member based on the measured amount of unevenness,
The belt-like member is a treat member whose cord is covered with treat rubber,
When the laser beam is in a direction inclined by 45 ° to 65 ° with respect to the normal direction of the belt-shaped member and the extension direction of the cord is orthogonal to the longitudinal direction of the belt-shaped member, Irradiate from the direction in which the extension direction and the longitudinal direction of the belt-like member are parallel,
When the extension direction of the cord intersects with the longitudinal direction of the belt-like member without being orthogonal, the irradiation is performed from the direction in which the extension direction of the laser light line and the extension direction of the cord are orthogonal,
A first optical element that forms an image of specularly reflected light from the band-shaped member on the photographing unit, or a front surface that is scattered light in a normal direction of the band-shaped member out of the scattered light of the laser light; A second optical element that forms an image of the scattered light on the photographing means is provided, or both the first optical element and the second optical element are provided, and the image and the front scattering by the specularly reflected light are provided. Take a picture with light,
A method for measuring the shape of a seam of a belt-like member, wherein the shape of the seam of the belt-like member is measured using the photographed image of specular reflection light and the image of the front scattered light. Using a laser irradiation means for irradiating laser light, irradiate a line-shaped laser light at the joint of the belt-like member, take an image of the laser light irradiation portion with an imaging means, and use the data of the taken image to form the belt-like shape A method for measuring a seam shape of a band-shaped member, which measures the amount of unevenness of a seam of a member, and measures the seam shape of the band-shaped member based on the measured amount of unevenness,
The belt-like member is a treat member whose cord is covered with treat rubber,
When the laser beam is in a direction inclined by 45 ° to 65 ° with respect to the normal direction of the belt-shaped member and the extension direction of the cord is orthogonal to the longitudinal direction of the belt-shaped member, Irradiate from the direction in which the extension direction and the longitudinal direction of the belt-like member are parallel,
When the extension direction of the cord intersects with the longitudinal direction of the belt-like member without being orthogonal, the irradiation is performed from the direction in which the extension direction of the laser light line and the extension direction of the cord are orthogonal,
A first optical element that forms an image of specularly reflected light from the belt-shaped member on the photographing means, or a plane formed by incident light of the laser light and specularly reflected light of the scattered light of the laser light A third optical element that forms an image on the imaging means of side scattered light that is scattered light in a direction perpendicular to or in a direction that intersects the plane in a plane that includes the perpendicular direction, or Provide both the first optical element and the third optical element, and take an image by the regular reflection light and an image by the side scattered light,
A method for measuring the shape of a seam of a belt-like member, wherein the shape of the seam of the belt-like member is measured using the photographed image of regular reflected light and the image of side scattered light. Using a laser irradiation means for irradiating laser light, irradiate a line-shaped laser light at the joint of the belt-like member, take an image of the laser light irradiation portion with an imaging means, and use the data of the taken image to form the belt-like shape A method for measuring a seam shape of a band-shaped member, which measures the amount of unevenness of a seam of a member, and measures the seam shape of the band-shaped member based on the measured amount of unevenness,
The belt-like member is a treat member whose cord is covered with treat rubber,
When the laser beam is in a direction inclined by 45 ° to 65 ° with respect to the normal direction of the belt-shaped member and the extension direction of the cord is orthogonal to the longitudinal direction of the belt-shaped member, Irradiate from the direction in which the extension direction and the longitudinal direction of the belt-like member are parallel,
When the extension direction of the cord intersects with the longitudinal direction of the belt-like member without being orthogonal, the irradiation is performed from the direction in which the extension direction of the laser light line and the extension direction of the cord are orthogonal,
The imaging means includes a reflection direction of specularly reflected light from the band-shaped member, a reflection direction of front scattered light that is scattered light in a normal direction of the band-shaped member of the scattered light of the laser light, or the laser Side surface which is scattered light scattered in the direction perpendicular to the plane formed by the incident light of the laser light and the specularly reflected light or the plane including the perpendicular direction out of the scattered light. Installed in one of the reflected directions of scattered light,
Furthermore, an optical element that forms an image on the photographing unit that reflects or scatters laser light reflected in a direction other than the direction in which the photographing unit is installed is provided, and the image by the regular reflection light, the image by the front scattered light, and the Take an image with side scattered light,
A method for measuring a joint shape of a belt-shaped member, wherein the joint shape of the belt-shaped member is measured using the photographed image by regular reflection light, the image by front scattered light, and the image by side scattered light. Laser irradiation means for irradiating a line-shaped laser beam at the joint of the belt-shaped member, photographing means for receiving a reflected light of the laser light from the belt-shaped member and photographing an image of the laser light irradiation portion, and the image A belt-like shape comprising: an unevenness measuring means for measuring the unevenness amount of the seam of the belt-like member; and a shape measuring means for measuring the joint shape of the belt-like member based on the unevenness amount measured by the unevenness amount measuring means A seam shape measuring device for members,
The band-shaped member is a treat member in which a cord is covered with a treat rubber,
An optical element that reflects the reflected light from the belt-shaped member of the laser light;
When the laser irradiation means is in a direction inclined by 45 ° to 65 ° with respect to the normal direction of the belt-shaped member and the extension direction of the cord is orthogonal to the longitudinal direction of the belt-shaped member, Irradiate the laser beam from the direction in which the extension direction and the longitudinal direction of the belt-like member are parallel,
When the extension direction of the cord intersects the longitudinal direction of the belt-shaped member without being orthogonal, the laser beam is irradiated from the direction in which the extension direction of the laser beam line and the extension direction of the cord are orthogonal,
The imaging means includes a reflection direction of specularly reflected light from the band-shaped member, a reflection direction of front-scattered light that is scattered light in a normal direction of the band-shaped member of the scattered light of the laser light, or the laser Side surface which is scattered light scattered in the direction perpendicular to the plane formed by the incident light of the laser light and the specularly reflected light or the plane including the perpendicular direction out of the scattered light. Installed in one of the reflected directions of scattered light,
The optical element is arranged so as to image reflected light or scattered light other than laser light reflected in the direction of the photographing means on the photographing means, respectively.
The unevenness measuring means measures the unevenness amount of the seam of the belt-like member using the image by the regular reflection light, the image by the front scattered light and the image by the side scattered light taken by the photographing means. A device for measuring the shape of a seam of a band-shaped member characterized by

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