JP6433822B2 - The width direction edge part position detection method of a strip | belt-shaped member. - Google Patents

Description

  The present invention relates to a width direction end position detection method for a band-shaped member.

  As part of the tire manufacturing process, there is a process in which a belt-like member such as a belt or an edge tape is laminated on a molding drum. After the process, an inspection is performed to confirm the state of attachment of the end portions in the width direction of the upper layer band-shaped members among the stacked band-shaped members. Conventionally, this inspection has been performed by the method described in Patent Document 1. That is, in a state where a plurality of belt-shaped members are stacked, the contour shape of the cross section is measured, and the position where there is a large step in the contour shape is determined as the position of the end portion in the width direction of the belt-shaped member. Based on the state of the position determined to be the position of the widthwise end of the band-shaped member by this method (for example, the state of deviation from the ideal position of the widthwise end of the band-shaped member), the actual band-shaped member It has been determined whether or not there is an abnormality that is out of the reference in the pasting state of the width direction end of the.

JP 2009-294182 A JP 2012-2522 A

  However, these end portions in the width direction are close to each other in a state where a plurality of belt-like members are laminated. There are also cases where the belt-like member itself is uneven (for example, the belt-like member is formed by joining smaller members and the joint is raised). Therefore, a plurality of steps appear close to the contour shape. For this reason, in the conventional method, it is difficult to determine which of these steps is a step due to the width direction end of the strip-shaped member to be inspected, and it is difficult to detect the end without making a mistake with the other. there were.

  On the other hand, if the measurement area of the contour shape is narrowed down to only an extremely narrow area where the end of the band member to be inspected is supposed to exist, only the end of the band member to be inspected can be detected. It is done. However, when the strip-shaped member to be inspected meanders, the end portion thereof is easily removed from the measurement region.

  As another method, a method described in Patent Document 2 has also been proposed. In this method, the contour shape of the belt-like member is measured every time one belt-like member is attached. However, in the same manner as in the method of Patent Document 1, the position where there is a large step in the contour shape is the belt-like member. It was judged that it was the edge part of the width direction. For this reason, even in this method, in the inspection of the upper-layer belt-shaped member among the stacked belt-shaped members, a plurality of steps appear close to the contour shape, and thus there is a problem similar to the above.

  Then, this invention makes it a subject to provide the width direction edge part position detection method of the strip | belt-shaped member in which the width direction edge part of the upper strip | belt-shaped member is reliably detected among several strip | belt-shaped members laminated | stacked on the molding drum. To do.

  The width direction edge position detection method of the belt-shaped member of the embodiment is a width direction edge position detection method of the belt-shaped member on the upper layer side when a plurality of belt-shaped members constituting the tire are stacked on the drum, After the lower band member is attached on the drum, it is exposed to the outside of one or more belt members attached on the drum including the lower band member as the previous measurement. After measuring the distance from the surface to the measuring device and attaching the upper layer side band member from above the lower layer side band member, as a later measurement, the outside of the plurality of band members stacked on the drum The distance from the surface exposed to the measuring instrument is measured, and the position of the end in the drum width direction of the region where the difference between the distance of the previous measurement and the distance of the subsequent measurement occurs is the It is detected as the end position in the width direction. .

  According to the present embodiment, the end in the width direction of the upper belt-like member among the belt-like members stacked on the molding drum is reliably detected.

The block diagram of the shaping | molding inspection apparatus 1 of embodiment. (A) Sectional drawing of the drum width direction of the 1st belt 20 affixed on the drum in the drum width direction one side. (B) Sectional drawing of the drum width direction of the 1st belt 20 and the edge tape 22 affixed on it in the drum width direction one side. (A) The outline of the surface of the belt-shaped member in the drum width direction obtained by the first measurement on one side in the drum width direction. (B) An outline in the drum width direction of the exposed surface of the band-shaped member, which is obtained by the second measurement on one side in the drum width direction. (C) A line drawn by subtracting the first measurement data from the second measurement data. (A) Sectional drawing of the drum width direction of the 1st belt 20, the edge tape 22, and the 2nd belt 24 affixed on it on the drum width direction one side. (A) The outline of the exposed surface of the belt-shaped member in the drum width direction, which is obtained by the third measurement on one side in the drum width direction. (B) A line drawn by subtracting the second measurement data from the third measurement data. The figure explaining the example 1 of a change.

(Device of this embodiment)
The inspection apparatus 10 according to the present embodiment detects the position in the width direction of the belt-like member B as a tire constituent member attached to the molding drum D in the manufacturing process of the pneumatic tire, and whether there is an abnormality in the attached state It is a device that inspects. As shown in FIG. 1, the inspection device 10 is provided at a location facing a rotatable molding drum D (hereinafter sometimes referred to as “drum” only). The inspection device 10 and the molding drum D are included in the molding inspection device 1.

  The molding drum D has a known structure, and its surface is formed by a plurality of segments 30 arranged in the circumferential direction. Each segment 30 is embedded with one or more magnets, and when a steel wire is embedded in the strip member B, the strip member B is attached to the surface of each segment 30 by a magnetic force. .

  It is desirable that a concave portion or a convex portion 31 is formed in a portion of the surface of the molding drum D where the band-shaped member molding drum D is not attached. This concave portion or convex portion 31 is used as a mark for alignment of the two measurement data when a difference between the measurement data of the previous measurement and the later measurement described later is obtained. Therefore, the depth or height of the concave portion or the convex portion 31 is a depth or height at which unevenness can be measured by a measuring device (in the case of the present embodiment, the two-dimensional laser displacement meter 11).

  The molding drum D is provided with moving means for moving the molding drum D in the drum axis direction. This moving means includes a traveling rail 32 extending in the drum axis direction, and a motor 33 provided at one end thereof. The traveling rail 32 is a rail provided below the molding drum D, and guides the molding drum D to travel in the drum axis direction by driving the motor 33.

  The inspection apparatus 10 includes two two-dimensional laser displacement meters 11, 11 as measuring instruments, a computer 5, and a control computer 7, and has the following configuration in detail.

  The two-dimensional laser displacement meter 11 measures the distance to the reflection surface by irradiating the laser beam and receiving the reflected light, and has a linear measurement range of a certain length extending in the drum width direction. is there. In the present embodiment, there are two two-dimensional laser displacement meters 11, 11, which are provided so as to face each other on both sides in the width direction of the molding drum D. Two two-dimensional laser displacement meters 11 and 11 are provided as part of the displacement meter unit 16. The displacement meter unit 16 is provided with a servo motor 12, and the distance between the two-dimensional laser displacement meter 11 and the molding drum D is changed by driving the servo motor 12. The displacement meter unit 16 can be moved in parallel to the drum axis by a moving means. This moving means includes a traveling rail 13 extending parallel to the drum shaft and a motor 14 provided at one end thereof. The travel rail 13 is a rail provided below the displacement meter unit 16 and guides the displacement meter unit 16 to travel parallel to the drum axis by driving the motor 14. Further, the distance between the two two-dimensional laser displacement meters 11, 11 of the displacement meter unit 16 is changed by a servo motor 15 provided in the displacement meter unit 16. Therefore, when the width of the band-shaped member B attached to the molding drum D is changed, the distance between the two two-dimensional laser displacement meters 11, 11 can be changed in accordance with the width.

  The two-dimensional laser displacement meter 11 is connected to the computer 5. Further, a servo motor 12 that changes the distance between the two-dimensional laser displacement meter 11 and the molding drum D, a motor 14 that moves the displacement meter unit 16 in a direction parallel to the drum axis, and between the two two-dimensional laser displacement meters 11 and 11. Servo motors 15 that change the distance are respectively connected to the control computer 7.

  A motor 33 that moves the molding drum D in the axial direction is also connected to the control computer 7.

  The control computer 7 includes a rotation control unit 70, a movement control unit 71, and a positioning unit 72. The rotation control unit 70 controls the rotation of the molding drum D. The movement control unit 71 controls the motor 33 to move the molding drum D in the drum width direction. The positioning unit 72 adjusts the positional relationship between the molding drum D and the two two-dimensional laser displacement meters 11. Specifically, the positioning unit 72 controls the motor 14 to move the displacement meter unit 16 to a position facing the molding drum D, and controls the servo motor 15 to provide two two-dimensional laser displacement meters 11, 11. Is approximately equal to the width of the belt-like member B, and the servo motor 12 is controlled to adjust the distance between the molding drum D and the two-dimensional laser displacement meter 11. By this adjustment, the positions of the two two-dimensional laser displacement meters 11 become positions suitable for the measurement of the end portions in the width direction of the band-shaped member B.

  The computer 5 includes an arithmetic processing unit 50, a storage unit 51 such as a hard disk, an input unit 52 such as a keyboard, and a display unit 53 such as a monitor.

  The arithmetic processing unit 50 reads a processing program from the storage unit 51 when the computer 5 is started up, and acts as a data acquisition unit 54, a data processing unit 55, and a determination unit 56.

  The data acquisition unit 54 acquires distance data measured by the two-dimensional laser displacement meter 11.

  The data processing unit 55 functions as an end position detection unit and a calculation unit. The end position detection unit detects the positions of both end portions in the width direction of the band-shaped member B based on the distance data acquired by the data acquisition unit 54. The detailed method will be described later. Further, the calculation unit is configured to detect variations in the positions of both ends in the width direction of the band-shaped member B or both ends in the width direction of the band-shaped member B based on the information on the positions of both ends in the width direction of the band-shaped member B detected by the end position detection unit. The amount of deviation of the actual position of the part from the ideal position is calculated.

  The determination unit 56 is based on a determination criterion that is input in advance through the input unit 52, and has excessive variations in the end position in the width direction of the band-shaped member B, excessive shift in the pasting position, turning up of the end portion, and other various standards. The presence or absence of an abnormality is determined. The determination result is displayed on the display unit 53 and stored in the storage unit 51.

  The control computer 7 and the computer 5 are electrically connected so that they can be synchronized with each other by transmitting and receiving signals. Therefore, after the control computer 7 adjusts the positional relationship between the molding drum D and the two-dimensional laser displacement meter 11, each part of the computer 5 starts operating, or the control computer 7 rotates the molding drum D. In the meantime, the computer 5 can acquire data measured by the two-dimensional laser displacement meter 11.

(Width direction end position detection method of the strip-shaped member B)
In the following, a method for detecting the position in the width direction end of the belt-like member on the upper layer side when two belts and an edge tape sandwiched between them are stuck on the drum will be exemplified.

  First, the motor 33 is driven, and the molding drum D is moved to the band member attaching position. Further, the motor 14, the servo motor 15, and the servo motor 12 are driven, and the two two-dimensional laser displacement meters 11 and 11 are moved to positions facing the end portions in the width direction of the belt-shaped member.

  In this state, first, as shown in FIG. 2A, a first belt 20 as a lowermost belt-like member is attached on the drum. Usually, while the first belt 20 is supplied from the supply device to the molding drum D, the molding drum D rotates 360 degrees, whereby the first belt 20 is pasted around the circumference of the drum.

  After the first belt 20 has been pasted, the molding drum D rotates again, and the first measurement is performed by the two-dimensional laser displacement meter 11 that does not move during that time. In this measurement, the distance from the surface of the first belt 20 to the two-dimensional laser displacement meter 11 is measured.

  Here, as described above, the two-dimensional laser displacement meter 11 has a linear measurement region of a certain length extending in the drum width direction. Therefore, the measurement area of the first measurement has a certain length in the drum width direction. The measurement area of one two-dimensional laser displacement meter 11 is an area on one side in the drum width direction. This measurement region includes at least the positions of the end portion 22a on the outer side in the drum width direction of the edge tape 22 to be subsequently attached and the width direction end portion 24a of the second belt 24. In the present embodiment, the width direction end portion 20a of the first belt 20 and the portion of the drum surface where the belt 20 is not attached are also included in this measurement region. Therefore, in the measurement of the present embodiment, the distance from the portion of the drum surface where the belt 20 is not attached to the two-dimensional laser displacement meter 11 is also measured. Further, when the concave or convex portion 31 is formed on the drum surface as the alignment mark, this is also included in the measurement region. Since two two-dimensional laser displacement meters 11 are provided on both sides in the drum width direction, such a measurement region is set on both sides in the drum width direction.

  As described above, since the two-dimensional laser displacement meter 11 has a linear measurement region extending in the drum width direction, only one position is measured by one measurement in the drum circumferential direction. . However, while the forming drum D rotates 360 degrees at a constant speed, the two-dimensional laser displacement meter 11 that does not move during that time is intermittently measured at short intervals so that it can be regarded as being substantially continuous. In general, the measurement is performed over a range of the drum. The measurement is preferably performed every time the molding drum D rotates at least 0.5 degrees. That is, it is desirable to measure at least 720 times while the molding drum D rotates 360 degrees.

  As a result of the measurement, position information on the surface of the first belt 20 and the drum surface in the measurement region and the distance from each position to the two-dimensional laser displacement meter 11 are obtained as data. From this measurement data, it is possible to draw the drum width and the contour O1 in the drum width direction of the surface of the first belt 20 affixed on the drum surface shown in FIG. Since the contour of the drum surface also appears in the contour O1, the height of the surface of the first belt 20 from the drum surface can be obtained based on the contour O1.

  Data obtained by the first measurement is acquired by the data acquisition unit 54 of the computer 5 and stored in the storage unit 51.

  Next, as shown in FIG. 2B, edge tapes 22 are attached to both sides in the width direction of the first belt 20, respectively. The edge tape 22 is affixed over the circumference of the drum.

  Thereafter, as the second measurement, in the same manner as the first measurement, one of the surface of the first belt 20 and the surface of the edge tape 22 exposed to the outside (exposed to the outside in the drum radial direction). The distance from the surface to the two-dimensional laser displacement meter 11 is measured. Further, the distance from the portion of the drum surface where the belt-like member is not attached to the two-dimensional laser displacement meter 11 is also measured. The measurement area is the same as the first measurement area. This measurement region includes an end 22a of the edge tape 22 on the outer side in the drum width direction.

  As a result of the measurement, as the data, position information on the exposed surface and the drum surface of the belt-shaped member in the measurement region and the distance from each position to the two-dimensional laser displacement meter 11 are obtained. From this measurement data, an outline O2 in the drum width direction of the drum surface and the exposed surface of the belt-like member (first belt 20 and edge tape 22) affixed on the drum surface shown in FIG. 3B is drawn. It is possible. Since the drum surface also appears in the contour O2, the height from the drum surface of the exposed surface of the belt-like member attached on the drum can be obtained based on the contour O2.

  Here, as shown in FIG. 2B, when the first belt 20 protrudes outward in the drum width direction from the edge tape 22, the two-dimensional laser displacement meter 11 is exposed from the surface of the protruding portion. And the distance from the surface of the edge tape 22 to the two-dimensional laser displacement meter 11 are measured. On the other hand, when the first belt 20 is completely hidden under the edge tape 22, the distance from the surface of the first belt 20 to the two-dimensional laser displacement meter 11 is not measured.

  Data obtained by the second measurement is acquired by the data acquisition unit 54 of the computer 5 and stored in the storage unit 51.

  Next, based on the data stored in the storage unit 51, the position of the end 22 a on the outer side in the width direction of the edge tape 22 is detected by the data processing unit 55. Specifically, first, correspondence between each position in the first measurement data and each position in the second measurement data is taken. For each position, the distance obtained by the first measurement (the distance from the surface exposed to the outside of the first belt 20 to the two-dimensional laser displacement meter 11) and the second measurement are obtained. And the distance (distance from the surface exposed to the outside of the surface of the edge tape 22 and the surface of the first belt 20 to the two-dimensional laser displacement meter 11).

  Here, when the concave portion or the convex portion 31 is detected in the first measurement and the second measurement and the positional information is obtained, the concave portion or the convex portion 31 is used as a mark for positioning the measurement data for two times. . That is, the concave or convex portion 31 in the first and second measurement data is used as a mark, and the correspondence between each position in the first measurement data and each position in the second measurement data is taken. Then, the difference between the distance obtained by the first measurement at each position and the distance obtained by the second measurement is obtained.

  As a result, at each position in the region where the edge tape 22 exists, a value corresponding to the thickness of the edge tape 22 is obtained as a difference. The difference is zero at each position in the region where the edge tape 22 does not exist. Therefore, the region where the difference between the distance obtained by the first measurement and the distance obtained by the second measurement is a region where the edge tape 22 exists. Based on this, the position of the outer end in the drum width direction of the region where the difference occurs is detected as the position of the outer end 22 a in the width direction of the edge tape 22.

  FIG. 3C shows the difference described above, where the horizontal axis indicates the position in the drum width direction, and the vertical axis indicates the difference between the first measurement distance and the second measurement distance at each position. It represents. The line L1 depicting this difference can be regarded as depicting the outline of the cross section in the drum width direction of only the edge tape 22. In FIG. 3C, the position of the outer end of the edge tape 22 in the drum width direction in the region where the contour of the edge tape 22 appears (that is, the region where the difference is not 0) is the position of the end 22a of the outer side of the edge tape 22 in the width direction. It is.

  Next, as shown in FIG. 4, a second belt 24 as the uppermost belt-like member is attached from above the edge tape 22. The second belt 24 is affixed over the entire circumference of the drum.

  Thereafter, as the third measurement, in the same manner as the first measurement and the second measurement, the surface of the first belt 20, the surface of the edge tape 22 and the surface of the second belt 24 are arranged outside. The distance from the exposed surface (exposed surface) to the two-dimensional laser displacement meter 11 is measured. Further, the distance from the portion of the drum surface where the belt-like member is not attached to the two-dimensional laser displacement meter 11 is also measured. The measurement area is the same as the second measurement area. This measurement region includes the end 24a in the width direction of the second belt 24.

  As a result of the measurement, as the data, position information on the exposed surface and the drum surface of the belt-shaped member in the measurement region and the distance from each position to the two-dimensional laser displacement meter 11 are obtained. From this measurement data, the drum on the exposed surface of the drum surface and the belt-like member (first belt 20, edge tape 22, and second belt 24) affixed on the drum shown in FIG. 5 (a). It is possible to draw an outline O3 in the width direction. Since the drum surface also appears in the contour O3, the height from the drum surface of the exposed surface of the belt-like member attached on the drum can be obtained based on the contour O3.

  Here, when the first belt 20 or the edge tape 22 protrudes outward in the drum width direction from the second belt 24 as shown in FIG. The distance to the two-dimensional laser displacement meter 11 and the distance from the surface of the second belt 24 to the two-dimensional laser displacement meter 11 are measured. On the other hand, when another belt-like member is completely hidden under the second belt 24, the distance from the surface of the hidden belt-like member to the two-dimensional laser displacement meter 11 is not measured.

  Data obtained by the third measurement is acquired by the data acquisition unit 54 of the computer 5 and stored in the storage unit 51.

  Next, the position of the end 24a in the width direction of the second belt 24 is determined based on the data stored in the storage unit 51 by the same method as the method for detecting the position of the end 22a on the outer side in the width direction of the edge tape 22. Is detected. Specifically, first, correspondence between each position in the second measurement data and each position in the third measurement data is taken. For each position, the distance obtained by the second measurement (the distance from the surface exposed to the outside of the surface of the edge tape 22 and the surface of the first belt 20 to the two-dimensional laser displacement meter 11). And the distance obtained by the third measurement (from the surface exposed to the outside of the surface of the second belt 24, the surface of the edge tape 22, and the surface of the first belt 20) The distance to 11) is determined. When the concave or convex portion 31 is detected and the positional information is obtained in the second and third measurements, the concave or convex portion 31 is used as a mark for alignment of the measurement data for two times as described above. It is done.

  As a result, a value corresponding to the thickness of the second belt 24 is obtained as a difference at each position in the region where the second belt 24 exists. The difference is zero at each position in the region where the second belt 24 is not present. Therefore, the region where the difference between the distance obtained by the second measurement and the distance obtained by the third measurement is a region where the second belt 24 is present. Based on this, the end position in the drum width direction of the region where the difference occurs is detected as the position of the end 24a in the width direction of the second belt 24.

  FIG. 5B illustrates the difference described above, where the horizontal axis represents the position in the drum width direction, and the vertical axis represents the difference between the second measurement distance and the third measurement distance at each position. It represents. The line L2 depicting this difference can be regarded as depicting the outline of the cross section in the drum width direction of only the second belt 24. In FIG. 5B, the position of the outer end in the drum width direction of the region where the shape of the second belt 24 appears (that is, the region where the difference is not 0) is the outer side in the width direction of the second belt 24. This is the position of the end 24a.

  When the positions of the end portion 22a on the outer side in the width direction of the edge tape 22 and the width direction end portion 24a of the second belt 24 are detected as described above, the amount of deviation of these end portions from the ideal position is detected. Etc. are calculated, and the determination unit 56 determines the presence or absence of abnormality.

(effect)
According to this method, since the stepped portion in the contour shape of the cross section of the plurality of strip-shaped members stacked is not determined to be the width direction end portion of these strip-shaped members, any of the plurality of contour-shaped steps is the upper layer. There is no problem that it is difficult to determine whether or not it is the end in the width direction of the belt-like member on the side. In this method, the distance from the two-dimensional laser displacement meter 11 of the surface exposed to the outside of one or two or more belt-like members is measured before and after the upper-layer belt-like member is attached, and these distances are measured. The region where the difference is generated is determined as the region where the upper-layer belt-like member is attached, and the end in the drum width direction of that region is determined as the width-direction end of the upper-layer belt-like member. Therefore, even when the width direction end portions of the plurality of band-shaped members are close to each other, the width direction end portions of the upper layer side band-shaped member are reliably detected without being affected by this.

  For this reason, the measurement region is not narrowed down to a very narrow region in order to detect the end in the width direction of the upper belt member. For this reason, when the upper-layer belt-shaped member meanders, the possibility that the end portion thereof is out of the measurement region is low.

  Furthermore, even when the unevenness is formed on the belt-shaped member itself, the unevenness is not determined as the end of the belt-shaped member.

  Further, if the concave portion or the convex portion 31 is used as a mark for positioning the measurement data for the second time, the positional deviation does not occur in the measurement data for the second time. The position of the end in the width direction is accurately detected.

(Modification 1)
As in the above-described embodiment, the distance from the drum surface to the measuring instrument may be measured in the previous measurement performed before the upper-layer belt-shaped member is bonded and in the measurement performed after the bonding. desirable. If there is a difference between these distances, the distance data of the previous measurement or the subsequent measurement is corrected so that the difference is eliminated, and then the distance data of the previous measurement and the subsequent measurement (either It is desirable that the difference between the one data is corrected).

  For example, when the distance from the drum surface to the measuring instrument in the previous measurement (drum surface distance from the previous measurement) is longer than the distance from the drum surface to the measuring instrument in the subsequent measurement (drum surface distance from the subsequent measurement) When the distance data of the subsequent measurement is subtracted from the distance data of the previous measurement, the subtraction result becomes positive even in the region where the upper-layer side band-like member including the drum surface is not attached. Then, in reality, it is determined that the upper layer side band-like member exists also in the region where the upper layer side band member is not attached. As a countermeasure, the absolute value of the difference between the drum surface distance of the previous measurement and the drum surface distance of the subsequent measurement is subtracted from all the data of the previous measurement. Then, regarding the region where the upper-layer belt-like member is not attached, the corrected distance data of the previous measurement and the distance data of the subsequent measurement are equal. After that, when the difference between the corrected distance data of the previous measurement and the distance data of the subsequent measurement is obtained, the difference becomes 0 in the area where the upper band member is not attached, and the upper layer There is a difference in the region where the belt-like member on the side is attached. For this reason, the region where the upper belt-like member exists is accurately recognized.

  This example will be described with reference to FIG. In FIG. 6, reference numeral 90 denotes a drum surface, reference numeral 91 denotes a lower band member, reference numeral 92 denotes an upper layer member, and reference numeral 93 denotes a measuring instrument. In each of (a) to (c), the left side shows the arrangement in the previous measurement, and the right side shows the arrangement in the subsequent measurement. First, when the drum surface distance of the previous measurement is equal to the drum surface distance of the subsequent measurement (in the case of FIG. 6A), the difference between the data of the distance of the previous measurement and the data of the distance of the subsequent measurement. Is required, a difference occurs only in the region 94 where the upper-layer belt-like member 92 is attached. However, when the drum surface distance of the previous measurement is longer than the drum surface distance of the subsequent measurement by the distance d (in the case of FIG. 6B), the data of the distance of the previous measurement and the data of the distance of the subsequent measurement. If the difference is obtained, a difference also occurs in the region excluding the region 94 where the upper-layer belt-like member 92 is attached. Therefore, in such a case, the drum surface 90 is moved by the distance d in the direction indicated by the arrow A in FIG. 6C so that the drum surface distance of the previous measurement and the subsequent measurement can be regarded as being equal (that is, FIG. The distance data of the previous measurement is corrected so that it can be considered that the state is the same as 6 (a).

  By this method, even when the distance from the drum surface to the measuring instrument changes between the previous measurement and the subsequent measurement, the region where the upper-layer belt-like member is attached is accurately recognized, and the upper-layer belt-like member is recognized. The position of the end portion in the width direction of the member is accurately detected. In particular, when the application of the lower-layer side belt-like member and the upper-layer side belt-like member are performed at different locations (for example, the molding drum D moves on the traveling rail 32 after the lower-layer side belt-like member is attached). Accordingly, when the displacement meter unit 16 also moves on the traveling rail 13), the distance from the drum surface to the measuring device may change. However, according to this method, even if the distance from the drum surface to the measuring instrument changes, the position of the end portion in the width direction of the upper belt member is accurately detected.

(Modification 2)
The measuring device that measures the distance to the surface of the belt-like member is not limited to the two-dimensional laser displacement meter. Any measuring device may be used as long as the distance from the measuring device to the surface of the belt-like member can be obtained directly or indirectly, and various measuring devices known in the art are listed as candidates. The two-dimensional laser displacement meter is one of optical displacement meters, but another optical displacement meter suitable for measurement includes, for example, a one-dimensional laser displacement meter. In the case of measurement with a one-dimensional laser displacement meter, it is desirable that the measurement is performed every time the molding drum D rotates at least 0.5 degrees, and the measurement interval in the drum axis direction is the same as the measurement interval in the drum circumferential direction. It is desirable. In addition, for example, an ultrasonic displacement meter that measures the distance to the reflecting surface by transmitting ultrasonic waves and receiving reflected ultrasonic waves is also a candidate for a measuring instrument.

(Modification 3)
In the above embodiment, the belt-like member is laminated in three layers, but it may be laminated in two layers or in four or more layers. No matter how many layers are stacked, up to the band member (lower band member) that is one layer below the band member (upper band member) to be inspected is stuck on the drum. The previous measurement is performed in the state, and the subsequent measurement is performed in a state where the upper layer side band member is attached on the lower layer side band member, and the upper layer is determined from the difference between the previous measurement result and the subsequent measurement result. The position of the end of the side strip is revealed. It should be noted that the previous measurement area and the subsequent measurement area are the same, and this area includes the position of the end portion of the upper-layer strip member to be inspected. Examples of the belt-like member B attached to the drum include a carcass ply and a tread in addition to the belt and the edge tape.

(Modification 4)
In the above embodiment, one two-dimensional laser displacement meter 11 is used to detect one end in the width direction of the belt-shaped member. Then, the two two-dimensional laser displacement meters 11 detected both ends in the width direction of the belt-like member. However, when the measuring range in the drum width direction of a measuring instrument such as the two-dimensional laser displacement meter 11 is wide, detection of both ends in the width direction of the belt-shaped member may be performed with one measuring instrument. Note that the distance from the drum surface to the two-dimensional laser displacement meter 11 does not have to be measured when the data alignment using the concave or convex portion 31 on the drum surface or the method of the first modification example is not performed. .

B ... strip member, D ... molding drum, O1, O2, O3 ... contour, L1, L2 ... line, 1 ... molding inspection device, 10 ... inspection device, 11 ... two-dimensional laser displacement meter, 12 ... servo motor, 13 ... Traveling rail, 14 ... motor, 15 ... servo motor, 16 ... displacement meter unit, 20 ... first belt, 20a ... end in width direction of first belt 20, 22 ... edge tape, 22a ... edge tape 22 The outer end of the drum in the width direction of the drum, 24 ... the second belt, 24a ... the end of the second belt 24 in the width direction, 30 ... segment, 31 ... concave or convex, 32 ... running rail, 33 ... motor DESCRIPTION OF SYMBOLS 5 ... Computer, 50 ... Arithmetic processing part, 51 ... Memory | storage part, 52 ... Input part, 53 ... Display part, 54 ... Data acquisition part, 55 ... Data processing part, 56 ... Determination part, 7 ... Control computer, 70 ... Rotation control unit, 7 ... Movement control part, 72 ... Positioning part, 90 ... Drum surface, 91 ... Lower layer side band member, 92 ... Upper layer side band member, 93 ... Measuring instrument, 94 ... Upper layer side band member 92 region

Claims (3)

When a plurality of belt-shaped members constituting a tire are stacked on a drum, the width direction end position detection method of the belt-shaped member on the upper layer side,
After the lower band member is attached on the drum, it is exposed to the outside of one or more belt members attached on the drum including the lower band member as the previous measurement. The distance from the surface to the measuring instrument is measured,
After the upper belt member is pasted from above the lower belt member, as a later measurement, from the surface exposed to the outside of the plurality of belt members stacked on the drum to the measuring instrument The distance is measured,
The end in the width direction of the belt-shaped member, wherein the end position in the drum width direction of the region in which the difference between the distance of the previous measurement and the distance of the subsequent measurement occurs is detected as the width-direction end position of the upper-layer belt-shaped member Part position detection method. A concave portion or a convex portion is formed in a portion where the belt-like member of the drum is not attached,
In the previous measurement and the subsequent measurement, the concave portion or the convex portion is included in the measurement region, and the position thereof is detected.
The concave portion or the convex portion is a mark, and the correspondence between the position of the result of the previous measurement and the result of the subsequent measurement is taken, and the distance between the previous measurement and the distance of the subsequent measurement The width direction edge part position detection method of the strip | belt-shaped member of Claim 1 with which the area | region where a difference arises is confirmed.   In the previous measurement and the subsequent measurement, the distance from the drum surface to the measuring device is measured, and if there is a difference between these measured distances, the previous measurement or The width direction edge part position detection method of the strip | belt-shaped member of Claim 1 or 2 with which the result of the said subsequent measurement is correct | amended.

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