JP2010112827A - Joint inspecting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint inspecting device that can perform continuous inspection of a joint of a continuous sheet such as a ply for a tire in a width direction, can perform a reliable inspection and does not require a large space. <P>SOLUTION: This joint inspection device is adapted to inspect a joint in the way of conveying a continuous sheet of a top counteraction material in which the joint is formed in such a manner that edges of top counteraction materials are superposed and are connected with each other. The joint inspecting device includes a two-dimensional shape measuring sensor that is moved in a width direction of the continuous sheet along the joint under a condition that the continuous sheet is stopped and measures a displacement in the thickness direction of the continuous sheet at the joint. The joint inspecting device performs inspection of the joint on the basis of the measurement result. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a joint inspection apparatus for a continuous sheet of a top anti-material such as a tire ply, which is mainly used for a carcass or a belt layer in manufacturing a tire.

  A continuous sheet of top anti-material such as tire ply used for carcass or belt layer in tire manufacturing (hereinafter also referred to simply as “continuous sheet”) is generally connected by overlapping the ends of the top anti-material. By doing so, it is a continuous sheet. As an inspection device for judging the connection location of the continuous sheet, that is, the quality of the joint, an inspection device for measuring a joint cost using, for example, an optical displacement sensor has been proposed (Patent Document 1).

  FIG. 8 shows a specific example of an inspection apparatus that determines the quality of such a joint. In FIG. 8, a pair of upper and lower optical displacement sensors 81 are arranged on the same optical axis perpendicular to the continuous sheet so that the continuous sheet 82 is sandwiched from above and below at the three ends in the width direction of the continuous sheet 82. Three sets are arranged side by side.

  Then, the joint 83 passes through the optical displacement sensor 81 by moving the optical displacement sensor 81 or the continuous sheet 82 in the longitudinal direction of the continuous sheet 82. At this time, the displacement of the thickness of the joint 83 is measured by the optical displacement sensor 81 at the three locations, and the quality of the joint is evaluated based on the measurement results at the three locations. An example of the measurement result is shown in FIG. In FIG. 9, the horizontal axis indicates the measurement position in the width direction of the continuous sheet, and is shown in a form obtained by rotating FIG. 8 by 90 °.

  As shown in FIG. 8, in the above method, the number of measurement points is limited to three points at both ends and the center. On the other hand, since the width of the continuous sheet is 400 to 800 mm, the measured values at the measurement points at the left end, the center, and the right end are between the maximum allowable value (MAX value) and the minimum allowable value (MIN value) as shown in FIG. Even if it is judged as “good”, it is difficult to guarantee the quality of the joint between the measurement points (between the right end and the center, between the left end and the center). I can't catch it.

For this reason, when a defective sheet that could not be captured in the inspection is introduced into the tire production line, the production of defective tires is invited. Further, even if a sheet defect is noticed, there is a problem that the process cannot be stopped. There is also a problem that a space for installing a plurality of sensors above and below is required.
JP2007-315901

  In view of the above problems, the present invention enables continuous inspection of a joint in the width direction of a continuous sheet such as a tire ply, can perform a highly reliable inspection, and does not require a larger space. It aims at providing a joint inspection device.

In order to achieve the above object, a joint inspection apparatus according to the present invention comprises:
A joint inspection device for inspecting the joint in the course of transporting the continuous sheet of the top anti-material, in which joints are formed by overlapping and connecting the ends of the top anti-material,
In a state where the continuous sheet is stopped, a two-dimensional shape measurement sensor is provided that measures the displacement in the thickness direction of the continuous sheet at the joint by moving in the width direction of the continuous sheet along the joint.
The joint is inspected based on the measurement result.

In addition, the joint inspection device
Displacement in the thickness direction of the continuous sheet at the joint is continuously measured along the width direction of the continuous sheet.

  The present invention provides a joint inspection apparatus that can perform continuous inspection of a joint in the width direction of a continuous sheet such as a tire ply, can perform a highly reliable inspection, and does not require a large space. be able to.

  Hereinafter, the present invention will be described based on the best mode. Note that the present invention is not limited to the following embodiments. Various modifications can be made to the following embodiments within the same and equivalent scope as the present invention.

1. Configuration of Joint Inspection Device First, the configuration of the joint inspection device according to the present embodiment will be described.
FIG. 1 is a block diagram showing an outline of the configuration of the joint inspection apparatus according to the present embodiment. In FIG. 1, the joint inspection apparatus A1 is provided with a traveling means 1 that moves the non-contact (laser scan type) two-dimensional shape measurement sensor S1 and the material detection sensor S2 in the width direction of the continuous sheet B1.

  The traveling means 1 includes a rotating shaft 11, a traveling member 13 inserted through the rotating shaft 11 and connected to the two-dimensional shape measurement sensor S1, a material detection sensor S2, a stopper 12, and a motor M for rotating the rotating shaft 11. Then, as the rotating shaft 11 rotates, the two-dimensional shape measurement sensor S1 and the material detection sensor S2 connected to the traveling member 13 move in the width direction of the continuous sheet B1.

  The joint inspection apparatus A1 is a material detection sensor that moves the two-dimensional shape measurement sensor S1 and the material detection sensor S2 in the width direction of the continuous sheet B1 between two stoppers 12 provided outside the continuous sheet B1. While S2 detects the continuous sheet B1, the laser is irradiated from the two-dimensional shape measurement sensor S1 toward the continuous sheet B1, and the displacement in the thickness direction of the continuous sheet B1 is measured.

  The movement of the continuous sheet B1 in the width direction of the two-dimensional shape measurement sensor S1 and the material detection sensor S2 is controlled by adjusting the rotation of the motor M, that is, the movement amount, that is, the two-dimensional shape measurement sensor S1, the material detection sensor. The displacement in the width direction of S2 is sent to the control unit 2 via the motor amplifier 4.

  The joint measurement result by the two-dimensional shape measurement sensor S1 and the material detection result by the material detection sensor S2 are sent to the control unit 2 via the sensor amplifiers 3 and 6, respectively. And the control part 2 determines the quality of a joint based on the measurement result of the joint by two-dimensional shape measurement sensor S1, and when a defect is detected, the warning means 5 outputs warning signals, such as sound and light.

  As described above, the joint inspection apparatus A1 according to the present embodiment moves the displacement in the thickness direction of the continuous sheet while moving the two-dimensional shape measurement sensor S1 between the two stoppers 12 in the width direction of the continuous sheet B1. Measuring. For this reason, the joint can be continuously inspected over the entire width of the continuous sheet, and the reliability of the joint inspection can be improved.

  Depending on the accuracy required, it may not be necessary to inspect the joint continuously. In that case, according to the required accuracy or the like, an interval for inspection can be determined as appropriate within a range in which the accuracy does not decrease.

  Further, when the two-dimensional shape measuring sensor S1 moves in the width direction of the continuous sheet B1, it measures the displacement in the thickness direction of the continuous sheet in a wide range including the joint margin, and therefore can efficiently measure the entire joint. it can.

  And since the two-dimensional shape measurement sensor S1 is adopted as a sensor, it is not necessary to arrange a pair of sensors above and below the joint of the continuous sheet, and the displacement in the thickness direction of the joint is measured only by inspection from above the joint. A large space becomes unnecessary.

2. Joint Inspection Method Next, a joint inspection method using the joint inspection apparatus will be described.
(A) Continuous sheet production line provided with joint inspection device FIG. 2 is a perspective view showing an outline of a continuous sheet production line provided with the joint inspection device. As shown in FIG. 2, the continuous sheet B1 is conveyed in the direction indicated by the horizontal arrow, and a joint device A2, a joint passage detection device A3, and a joint inspection device A1 are provided in order on the way to the winding device A4. ing. These devices are controlled by control means (not shown).

  As described above, since the joint inspection device A1 is disposed at the fixed position, in order to perform a reliable inspection, it is necessary to reliably stop the joint B3 of the continuous sheet B1 within the inspection range. Therefore, the continuous sheet B1 is surely stopped by providing the joint passage detection device A3 on the upstream side of the joint inspection device A1.

  Specifically, when the joint passage detection device A3 detects the joint B3 of the continuous sheet B1, a detection signal is output, and when the detected joint B3 reaches the inspection range of the joint inspection device A1, the winding device A4 is activated. Stop. If the passing inspection is missed, the continuous sheet B1 is stopped when the continuous sheet B1 moves, for example, by 1500 mm (prep width is 1500 mm or less, for example).

(B) Measurement of displacement in thickness direction of joint FIG. 3 is a diagram schematically showing a joint inspection apparatus before the start of joint inspection. In FIG. 3, the continuous sheet B <b> 1 is stopped so that the joint B <b> 3 is located immediately below where the two-dimensional shape measurement sensor S <b> 1 travels.

  Next, when the rotating shaft 11 is rotated by the motor M, the traveling member 13 moves along the rotating shaft 11 in the width direction of the continuous sheet B1, and together with this, the two-dimensional shape measurement coupled to the traveling member 13 is performed. Sensor S1 and material detection sensor S2 move. The laser is irradiated downward (in the continuous sheet B1 direction) from the two-dimensional shape measurement sensor S1 and the material detection sensor S2 at predetermined measurement points (five points 1 to 5 in FIG. 3) to detect the material. While the sensor S2 confirms that there is the continuous sheet B1 below, the two-dimensional shape measurement sensor S1 measures the displacement in the thickness direction of the joint B3.

  Here, the calculation method of the displacement amount in the thickness direction based on the measurement of the displacement in the thickness direction of the joint B3 by the two-dimensional shape measurement sensor S1 will be specifically described with reference to FIG. The displacement amount ΔA in the thickness direction is the distance (displacement reference value) A from the bottom surface of the continuous sheet to the two-dimensional shape measurement sensor S1 (strictly the sensor head surface) and the two-dimensional shape measurement sensor S1 from the top surface of the continuous sheet at the joint B3. To the distance A ′, that is, ΔA = A−A ′. And the joint allowance B is calculated | required from the change of (DELTA) A in the length direction in each measurement location.

(C) Judgment of joint quality FIGS. 5 and 6 show examples of measurement results obtained by the above-described method, and are examples in which the number of measurement points is five. In FIG. 5, the horizontal axis indicates the displacement in the width direction of the continuous sheet, that is, the measurement position, and the vertical axis indicates the position in the longitudinal direction of the continuous sheet. And the displacement of the thickness direction of the joint with respect to the longitudinal direction of the continuous sheet in each measurement location is shown as a measurement value, and the thickness and joint cost of the joint in each measurement location can be known.

  FIG. 6 is a plot of the joint thickness (ΔA) extracted from the measurement results shown in FIG. 5, and each measured value is a predetermined maximum allowable value (MAX value) and minimum allowable value (MIN value). ) To determine whether the joint is good or bad.

  In FIG. 6, the quality of the joint is determined using the joint thickness as an index, but the quality of the joint can also be determined using the joint cost as an index. By using both the joint thickness and the joint cost as an index, The quality of the joint can be determined more accurately.

  An example of determining the quality of a joint using the joint cost as an index is shown in FIG. FIG. 7 is a plot of joint margins measured at 9 locations on a continuous sheet, similar to the measurement results at 5 locations shown in FIG. 5, with the horizontal displacement (measurement position) in the width direction of the continuous sheet. The quality of the joint is determined based on whether each measured value is between a predetermined maximum allowable value (MAX value) and a minimum allowable value (MIN value).

  In FIG. 7, as described above, the number of measurement points is nine. However, by increasing the number of measurement points, finer measurement is possible, so that more reliable determination can be performed and required accuracy is obtained. The number of measurement points can be increased or decreased as appropriate.

  The criterion for determining pass / fail is that if all measured values are between the maximum allowable value and the minimum allowable value, the joint status is determined to be “good”, and even one location is outside the allowable range (the fourth location in FIG. 6). If so, it is judged as “bad”. Specifically, the control unit 2 compares the measured value with the allowable range to calculate an excess / deficiency amount. The allowable value can be appropriately changed depending on the material of the top anti-material B2.

  As described above, in the inspection of the joint of the continuous sheet such as the tire ply, the joint can be continuously inspected in the width direction of the continuous sheet by performing the inspection using the joint inspection apparatus according to the present invention. Highly reliable inspection can be performed.

It is a block diagram which shows the outline | summary of a structure of the joint inspection apparatus which concerns on embodiment of this invention. It is a perspective view which shows the outline | summary of the manufacturing line of the continuous sheet using the joint inspection apparatus which concerns on embodiment of this invention. It is a figure which shows typically the mode immediately before the joint inspection by the joint inspection apparatus which concerns on embodiment of this invention. It is a figure which shows typically the mode of the joint inspection by the joint inspection apparatus which concerns on embodiment of this invention. It is a figure which shows typically the result of the joint test | inspection by the joint test | inspection apparatus which concerns on embodiment of this invention. FIG. 6 is an explanatory diagram for explaining a method of determining the quality of a joint based on the measurement result of the joint thickness by the joint inspection apparatus according to the embodiment of the present invention. FIG. 7 is an explanatory diagram for explaining a method for determining the quality of a joint based on the measurement result of the joint allowance by the joint inspection apparatus according to the embodiment of the present invention. It is a figure which shows the outline | summary of the joint inspection by the conventional joint inspection apparatus. It is explanatory drawing explaining the method to determine the quality of a joint based on the measurement result of the joint cost by the conventional joint inspection apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Traveling means 2 Control part 3, 6 Sensor amplifier 4 Motor amplifier 5 Warning means 11 Rotating shaft 12 Stopper 13 Traveling member 81 Optical displacement sensor A1 Joint inspection apparatus A2 Joint apparatus A3 Joint passage detection apparatus A4 Winding apparatus B1, 82 Continuous Sheet B2 Top anti-material B3, 83 Joint M Motor S1 Two-dimensional shape measurement sensor S2 Material detection sensor

Claims (2)

A joint inspection device for inspecting the joint in the course of transporting the continuous sheet of the top anti-material, in which joints are formed by overlapping and connecting the ends of the top anti-material,
In a state where the continuous sheet is stopped, a two-dimensional shape measurement sensor is provided that measures the displacement in the thickness direction of the continuous sheet at the joint by moving in the width direction of the continuous sheet along the joint.
A joint inspection apparatus that inspects the joint based on a result of the measurement.   The joint inspection apparatus according to claim 1, wherein the displacement in the thickness direction of the continuous sheet at the joint is continuously measured along the width direction of the continuous sheet.

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