JP4869000B2 - Bead filler inspection device - Google Patents

Description

  The present invention relates to a bead filler inspection device that detects defective products of bead fillers with beads.

  Conventionally, for the purpose of downsizing the extrusion equipment, improving the uniformity of tires, or flexibly responding to small lot multi-size production, etc., the ribbon rubber extruded from the small extruder is directly on the rotating support. A method of forming a rubber member having a predetermined cross section by winding and laminating is known, and various methods for forming a bead filler by laminating a ribbon-shaped bead filler rubber have been proposed.

One of these proposals is that the ribbon-shaped bead filler rubber 14 extruded by the extruder is placed on the outer peripheral side of the bead core 13 of the disk 15 as shown in FIG. ) To form a bead filler having a desired cross-sectional shape integrated with an annular bead (see Patent Document 1). Here, an example in which a total of 10 layers of ribbon-shaped bead filler rubber 14 is wound adjacent to the outer periphery of the bead core 13 is shown, but in the actual process, a ribbon-shaped bead filler rubber having a width of 6 mm and a thickness of 0.5 mm is shown. The bead filler 12 is formed by winding 14 about 50 layers. Thus, by laminating and laminating one type of ribbon-shaped bead filler rubber 14 having a small width and thickness, it is possible to form bead fillers 12 of various sizes into desired shapes.
JP 2005-111786 A

  In the molding method described above, in order to change the ribbon-shaped bead filler rubber having the cross-section extruded in a straight line into a donut-shaped bead filler rubber extending inward and outward in the radial direction in the cross section of the product tire, the radially outer portion is formed. It is necessary to greatly extend the inner part. For this reason, the elongation becomes nonuniform in the circumferential direction, and defective products may occur in the bead filler with beads due to the laminating disorder of the ribbon bead filler rubber. In the past, defective products due to this stacking disorder were detected by visual inspection with the human eye by measuring the weight of the bead filler with beads and comparing it with a reference weight value, so the detection accuracy is not very high There was a problem.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a bead filler inspection apparatus with high detection accuracy of defective products due to laminating disturbance of bead fillers with beads.

  In order to achieve the above object, a bead filler inspection apparatus according to the present invention comprises means for measuring two-dimensional measurement shape data by measuring the width and thickness of a bead filler with a bead, the measurement shape data, and a reference shape of the bead filler with a bead. And a means for detecting a defective product of the bead filler with a bead by comparing with the data.

  The means for creating the two-dimensional measurement shape data is preferably a two-dimensional displacement sensor, and the measurement shape data is preferably measurement shape data created at predetermined intervals over the entire circumference of the bead filler with beads. .

  Further, the bead filler inspection method of the present invention creates a two-dimensional measurement shape data by measuring the width and thickness of the bead filler with the bead, and compares the measurement shape data with the reference shape data of the bead filler with the bead. A defective bead filler is detected.

  The present invention measures the width and thickness of a bead filler with a bead, and measures the width and thickness over the entire circumference of the bead filler with a bead, and compares it with a reference value to determine defective products. In this way, it is possible to prevent a mixture of defective products due to human error.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a system configuration diagram showing an embodiment of a bead filler inspection device of the present invention. The bead filler inspection apparatus 10 includes a data acquisition unit 1 that measures the width and thickness of a bead filler with a bead to create two-dimensional measurement shape data (profile), and a two-dimensional that is created at predetermined intervals over the entire circumference of the bead filler with a bead. Data storage means (computer memory) 2 for storing the measured shape data, reference data storage means (computer memory) 3 for storing the reference shape data of the bead filler with beads, and the measurement shape data obtained from the measurement data storage means 2 Are compared with the reference shape data acquired from the reference data storage means 3 to determine whether or not the bead filler with the bead is acceptable, results display means (computer monitor) 5 for outputting the result of the acceptance determination, and these And an overall apparatus control means 6 for controlling the means.

  In FIG. 1, the arithmetic processing means 4 and the overall apparatus control means 6 are realized by executing a computer program.

  The data acquisition means 1 irradiates a bead filler with a bead with a line-shaped laser beam, receives the reflected light, acquires the displacement in the thickness direction of the bead filler with the bead, and creates two-dimensional measurement shape data (profile). A two-dimensional displacement sensor 7, a rotating table 8 on which a bead filler with a bead is mounted, and a tire rotation driving device 9 that rotates the rotating table 8 at a predetermined rotational speed or feeds it in the circumferential direction at a predetermined pitch. It is configured with.

  The two-dimensional displacement sensor irradiates a bead filler with a bead with a laser beam and condenses the reflected light on the light position detecting element on the light receiving side, and the shape is displaced in the thickness direction (Z-axis direction) of the bead filler with the bead. If there is, the spot condensed on the optical position detecting element in the thickness direction is displaced according to the shape, and the displacement amount in the thickness direction of the bead filler with beads is measured. In addition, the scanner inside the two-dimensional displacement sensor scans the laser beam at high speed in the width direction (X-axis direction), and detects the position where the measurement is performed by the optical position detection element in the width direction. Two-dimensional shape data (profile) can be created from the displacement in the thickness direction.

  The data acquisition means 1 of this embodiment irradiates a laser beam while sending a bead filler with a bead, collects the reflected light and creates shape data of the bead filler with the bead, and the width and thickness of the bead filler with the bead from the shape data. Can be obtained with high accuracy.

  The reference data storage means 2 stores reference shape data that is shape data (profile) of a bead filler with a bead having a reference width and thickness.

  The arithmetic processing unit 4 acquires the shape data of the bead filler with beads (measured product) from the measurement data storage unit 2 and acquires the reference shape data from the reference data storage unit 3 based on a command from the overall apparatus control unit 6. The reference width obtained from the reference shape data and the measured product width obtained from the shape data of the measured product are compared to obtain a degree of coincidence between the reference width and the measured product width, and further obtained from the reference shape data. Compare the reference thickness with the measured product thickness obtained from the shape data of the measured product to determine the degree of coincidence between the reference thickness and the measured product thickness. judge.

  2 and 4 are graphs showing the reference shape data of the bead filler with beads, and FIGS. 3 and 5 are graphs showing the measurement shape data of the bead filler with beads (measured product). In FIG. 3 and FIG. 5, measurement shape data created at predetermined intervals over the entire circumference of the bead filler with beads is displayed in an overlapping manner. Compare the reference width obtained from the reference shape data shown in FIG. 3 with the measured product width obtained from the measured shape data shown in FIG. 4 to determine whether the bead filler with a bead corresponds to a defective product, and By comparing the reference thickness obtained from the reference shape data shown in FIG. 5 and the measured product thickness obtained from the measured shape data shown in FIG. 5, it is determined whether or not the bead filler with a bead corresponds to a defective product.

  As described above, the bead filler inspecting device of the present invention measures the width and thickness of the bead filler with the bead, and measures the width and thickness over the entire circumference of the bead filler with the bead, and compares it with the reference value to determine the defective product. Therefore, it is possible to prevent defective products from being mixed due to human error.

It is a system configuration figure showing an embodiment of a bead filler inspection device of the present invention. It is a figure which shows reference | standard shape data on a graph. It is a figure which shows measurement shape data on a graph. It is a figure which shows reference | standard shape data on a graph. It is a figure which shows measurement shape data on a graph. It is a schematic explanatory drawing of a bead filler forming process with a bead.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Data acquisition means 2 Measurement data storage means 3 Reference data storage means 4 Operation processing means 5 Result display means 6 Overall apparatus control means 7 Two-dimensional displacement sensor 8 Turntable 9 Tire rotation drive device 10 Bead filler inspection device 12 Bead filler 13 Bead core 14 Ribbon Bead filler rubber 15 disc

Claims (4)

Means for measuring the width and thickness of a bead filler with a bead to create two-dimensional measurement shape data;
Means for comparing the measured shape data with reference shape data of a bead filler with a bead and detecting a defective product of the bead filler with a bead;
A bead filler inspection device comprising:   2. The bead filler inspection apparatus according to claim 1, wherein the means for creating the two-dimensional measurement shape data is a two-dimensional displacement sensor.   The bead filler inspection device according to claim 1, wherein the measurement shape data is measurement shape data created at predetermined intervals over the entire circumference of the bead filler with beads.   Measure the width and thickness of the bead filler with the bead to create two-dimensional measurement shape data, and compare the measurement shape data with the reference shape data of the bead filler with the bead to detect defective products of the bead filler with the bead. Characteristic bead filler inspection method.

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