Raw cover molding device and inspection system

Abstract

To improve quality of a raw cover to be manufactured.SOLUTION: An inspection system 10 comprises: a cylindrical forming drum 51 in which a code material 5 is attached to an outer periphery; a first camera 61 and a second camera 62 placed facing predetermined positions on the outer periphery of the forming drum 51; and a processing device 90. The processing device 90 acquires images captured by the first camera 61 and the second camera 62. A relatively large amount of light is reflected at an end portion of the code material 5, and therefore the end portions of the code material 5 appear as a line shape in the image. Thereby, the processing device 90 can extract a right end portion and a left end portion of the cord material 5.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a raw cover molding apparatus and an inspection system. [Background technology]

[0002] For example, Patent Document 1 discloses a shape measuring device for tire rubber material, which includes a laser displacement sensor that can move in the width direction of the tire rubber material, an encoder that measures the position of the laser displacement sensor, and a computing device. According to the shape measuring device disclosed in Patent Document 1, a pair of laser displacement sensors are arranged in the upper and lower directions of the tire rubber material, and measure the thickness of the tire rubber material. The laser displacement sensor measures the thickness of the tire rubber material while moving in the width direction of the tire rubber material. At this time, the encoder measures the start position where the thickness of the tire rubber material is first detected and the end position where the thickness of the tire rubber material is no longer detected. The computing device calculates the distance between the start position and the end position as the width direction length of the tire rubber material. Whether or not the shape of the tire rubber material is as specified is confirmed based on the measured thickness and the calculated width. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-086754 A Summary of the Invention [Problem to be solved by the invention]

[0004] According to the shape measuring device as described above, the laser displacement sensors are arranged in pairs in the vertical direction of the rubber material for tires. Here, the tire manufacturing process includes a process of attaching a cord material (e.g., breaker or tread) in which a plurality of cords are covered with a topping rubber to a molding drum. In this process, if the cord material is attached to the molding drum in a state where it is shifted from a desired position in the width direction (so-called meandering), the uniformity of the tire deteriorates and the quality of the tire is reduced. Even in this process, it is considered possible to check whether the cord material is meandering by measuring the length of the rubber material for tires in the width direction. However, since the molding drum has a cylindrical shape, it is difficult to arrange the laser displacement sensors in the vertical direction of the cord material.

[0005] The inventors would like to improve the quality of manufactured row covers. [Means for solving the problem]

[0006] The raw cover forming device disclosed herein includes a cylindrical forming drum on whose periphery a cord material, which is made of a plurality of cords arranged in a predetermined direction and covered with a topping rubber, is attached, at least one camera arranged facing a predetermined position on the outer periphery of the forming drum so as to capture the cord material attached to the forming drum, and a processing device. The arithmetic device is configured to execute a process of acquiring an image of the cord material attached to the outer periphery of the forming drum, which is taken by the camera, and a process of extracting an end of the cord material from the acquired image of the cord material. Effect of the Invention

[0007] According to the raw cover forming device disclosed herein, the condition of the cord material attached to the forming drum can be inspected, thereby improving the quality of the manufactured raw covers. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a cross-sectional view showing the cross-sectional structure of a tire 200. As shown in FIG. [Diagram 2] FIG. 2 is a side view of the raw cover molding apparatus 100. As shown in FIG. [Diagram 3] FIG. 3 is an enlarged view of the vicinity of the forming drum 51 in FIG. [Figure 4] FIG. 4 is a schematic front view of the inspection system 10. As shown in FIG. [Diagram 5] FIG. 5 is an example of an image captured by the second camera 62. As shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, a raw cover molding device and an inspection system according to one embodiment will be described with reference to the drawings. Note that the present invention is not limited to the following embodiment. Each drawing is drawn diagrammatically and does not necessarily reflect the actual product. Each drawing shows only an example and does not limit the present invention unless otherwise specified. In addition, the same reference numerals are appropriately assigned to members and parts that perform the same function, and duplicated explanations are omitted.

[0010] <Tire 200> FIG. 1 is a cross-sectional view showing the cross-sectional structure of a tire 200. In FIG. 1, a cross section along the width direction of a tread portion 210 of the tire 200 is shown. The tire 200 is formed by vulcanizing and integrating a low cover, which is an unvulcanized tire in which a plurality of unvulcanized rubber members are combined, and molding an outer shape such as a tread pattern. The low cover is molded by a low cover molding device 100 (see FIG. 2). In FIG. 1, the boundaries of the rubber members before vulcanization are drawn so that the boundaries of the members constituting the tire 200 in the low cover before vulcanization can be seen. The boundaries of the members constituting the tire 200 in the low cover before vulcanization are integrated after vulcanization. In addition, hatching is omitted in part to make the figure easier to see. Note that FIG. 1 merely illustrates one embodiment of a tire, and the structure of the tire is not limited to the form shown in FIG. 1 unless otherwise specified. In addition, the arrangement of each member and the order of combination may be changed unless otherwise specified.

[0011] In the embodiment shown in FIG. 1, the tire 200 includes, in a low cover state, an inner liner 221, a carcass 222, a cushion rubber 223, a breaker 225, an undertread rubber 226, a tread rubber 227, and a sidewall rubber 228.

[0012] The inner liner 221 is a layer of a rubber sheet disposed inside the tire cord, and is a member for ensuring airtightness of the pneumatic tire. The carcass 222 is a cord layer including a cord. In this embodiment, the carcass 222 is formed of a plurality of layers. The plurality of layers are formed of a cord material 5 described later. The inner liner 221 and the carcass 222 are molded into a cylindrical shape by being attached to a molding drum 51 (see FIG. 3) described later. Beads (not shown) are disposed at both ends in the width direction of the inner liner 221 and the carcass 222. Both ends in the width direction of the inner liner 221 and the carcass 222 are folded back so as to cover the beads. Also, the inner liner 221 and the carcass 222 are molded into a toroidal shape by expanding the center part in the width direction toward the outer diameter side.

[0013] The cushion rubber 223, the breaker 225, the undertread rubber 226, the tread rubber 227, and the sidewall rubber 228 are attached to predetermined positions of the inner liner 221 and the carcass 222, which are formed into a toroidal shape. Then, the shape of the joints of the rubber material, etc., is adjusted, and a raw cover, which is an unvulcanized tire, is produced.

[0014] Here, the tread rubber 227 is a rubber member constituting the tread portion 210 that is the part that comes into contact with the ground during running. The tread rubber 227 is a rubber layer that is attached to the outer peripheral surface of the row cover, and has a required thickness. The breaker 225 is an arranged cord layer.

[0015] The breaker 225 absorbs shocks from the road surface and prevents external damage to the tread rubber 227 from reaching the carcass 222 directly, and also prevents separation between the tread rubber 227 and the carcass 222. The breaker 225 is formed from a cord material 5, which will be described later.

[0016] The cushion rubber 223 is disposed between the breaker 225 and the carcass 222 at the edge portion of the breaker 225. The cushion rubber 223 acts as a buffer material that reduces the force that the edge portion of the breaker 225 receives from acting on the carcass 222.

[0017] The undertread rubber 226 is disposed between the tread rubber 227 and the breaker 225. In this embodiment, the undertread rubber 226 is provided particularly so as to cover the edge portion of the breaker 225, and acts as a buffer material that reduces the force that the edge portion of the breaker 225 receives from acting on the tread rubber 227.

[0018] <Code Material 5> The cord material 5 is a material in which a plurality of cords arranged in a predetermined direction are covered with a topping rubber. The cords may be, for example, textile fibers such as polyester fibers, nylon fibers, or aramid fibers, or metals such as steel wires. The cord material 5 is extruded, for example, by an extrusion molding device (not shown) while covering the cords with the topping rubber, and is extruded into the conveying device 30 (see FIG. 2) of the raw cover molding device 100. As described above, the cord material 5 may include the carcass 222 and the breaker 225 of the tire 200.

[0019] <Low cover molding device 100> Fig. 2 is a side view of the low cover molding apparatus 100. The low cover molding apparatus 100 is an apparatus for molding a low cover. Fig. 2 shows a schematic diagram of the portion of the apparatus for molding the low cover where an inner liner 221 and a carcass 222 (see Fig. 1) as a cord material 5 are assembled. Fig. 3 is an enlarged view of the vicinity of the molding drum 51 in Fig. 2. The low cover molding apparatus 100 may include an apparatus for kneading rubber material and an apparatus for assembling tire parts such as sidewall parts, tread parts, and shoulder parts, but a description thereof will be omitted here.

[0020] In the embodiment shown in Fig. 2, the inner liner 221 is prepared in a state of being wound around the reel 110. A plurality of cord materials 5a-5d constituting the carcass 222 are cut to a predetermined width and prepared in a state of being wound around the reels 111-114. Note that, in the example shown in Fig. 2, the number of cord materials 5a-5d constituting the carcass 222 is four, but the number of cord materials incorporated into the low cover is not particularly limited.

[0021] Here, the downstream side in the conveying direction in which the cord materials 5a to 5d are conveyed is represented as the rear. The directions of front, rear, left, right, up, and down are represented by arrows F, Rr, L, R, U, and D in the drawing, respectively. However, these directions are merely for convenience of explanation and do not limit the installation direction of the raw cover molding apparatus 100, etc. For convenience, the rear, which is the conveying direction of the cord materials 5a to 5d, is represented as one direction, but the conveying direction of the cord materials 5a to 5d may change midway.

[0022] As shown in FIGS. 2 and 3, the raw cover forming apparatus 100 includes a conveying device 30, a cutting device 40, a forming drum 51, and an inspection system 10.

[0023] The conveying device 30 is a device that conveys the inner liner 221 and the multiple cord materials 5a-5d toward the forming drum 51. As shown in Fig. 3, the conveying device 30 has, for example, an endless belt 31 wound around multiple rollers 32 arranged along a predetermined conveying path leading to the forming drum 51. At least one of the multiple rollers 32 is a drive roller. The endless belt 31 runs as the drive roller rotates.

[0024] As shown in Fig. 2, the cutting device 40 is a device that cuts the inner liner 221 and the multiple cord materials 5a-5d fed from the reels 110-114 to a predetermined length. The cutting device 40 includes, for example, a cutter and a cutter operating device (not shown). The cutter operating device operates the cutter. In this embodiment, the cutter cuts the cord materials 5a-5d to a predetermined length for one tire.

[0025] The forming drum 51 is a cylindrical member disposed downstream of the conveying device 30. The forming drum 51 is configured to be rotatable around a rotation center axis CL. The forming drum 51 includes a plurality of segments 51a. Each segment 51a is attached to the forming drum 51 so that it can be contracted and expanded in the circumferential direction. In this embodiment, a winding device 52 for rotating the forming drum 51 is provided on the rotation center axis CL of the forming drum 51. In this embodiment, the winding device 52 is configured so that when the inner liner 221 and the plurality of cord materials 5a to 5d are attached to the forming drum 51, the forming drum 51 rotates from the rear to the front when viewed from above the forming drum 51.

[0026] In the raw cover forming apparatus 100 shown in Fig. 2, the inner liner 221 and the plurality of cord materials 5a to 5d are fed from the reels 110 to 114, respectively. The inner liner 221 and the plurality of cord materials 5a to 5d fed from the reels 110 to 114 are cut to a predetermined length by the cutting device 40. The inner liner 221 and the plurality of cord materials 5a to 5d cut to a predetermined length by the cutting device 40 are conveyed one by one in order toward the forming drum 51 through the conveying device 30, and are attached to the forming drum 51 in order. The cord materials 5a to 5d are conveyed in the order of the cord material 5a, the cord material 5b, the cord material 5c, and the cord material 5d.

[0027] 3 shows a state in which the inner liner 221 sent out from the reel 110 and the cord material 5a sent out from the reel 111 in FIG. 2 are attached to the forming drum 51 in this order, and then the cord material 5b sent out from the reel 112 is attached to the forming drum 51. Here, the cord material 5a will be referred to as the first cord material 5a, and the cord material 5b will be referred to as the second cord material 5b. In the following description, the term cord material 5 refers to the same description of the cord materials 5a to 5d. The first cord material 5a and the second cord material 5b attached to the forming drum 51 have different cord arrangements (directions and patterns) with respect to the circumferential direction of the forming drum 51.

[0028] FIG. 4 is a schematic front view of the inspection system 10. In this embodiment, as shown in FIG. 4, the width of the first code material 5a is wider than the width of the second code material 5b. In FIG. 4, the first code material 5a is disposed below the second code material 5b. That is, the second code material 5b is disposed in a state in which it overlaps the first code material 5a. Note that two or more code materials 5 may be disposed in a state in which they overlap on the forming drum 51. However, even when two or more code materials 5 overlap, the following description is valid for two of the code materials 5. Therefore, in the following description, the first code material 5a and the second code material 5b are used.

[0029] Incidentally, in order to improve the quality of the tire 200, it is desirable that the inner liner 221 sent out from the reel 110 and the cord materials 5a to 5d sent out from the reels 111 to 114 are attached to appropriate positions on the forming drum 51. For example, if the position where the cord material 5 is attached is misaligned in the width direction when the low cover is formed, variation in quality may occur in the tire 200 after vulcanization molding. The inspection system 10 disclosed herein can inspect the width and position of the cord material 5 attached to the forming drum 51 when the low cover is formed. The inspection system 10 will be described below.

[0030] Inspection System 10 As shown in FIG. 3, the inspection system 10 includes a first camera 61, a second camera 62, a first illuminator 63, a second illuminator 64, and a processing device 90 (see FIG. 4).

[0031] <First camera 61, second camera 62> The first camera 61 and the second camera 62 are arranged facing a predetermined position on the outer circumferential surface of the forming drum 51 so as to capture the code material 5 attached to the forming drum 51. As shown in FIG. 3, the first camera 61 and the second camera 62 are arranged facing the rotation center axis CL of the forming drum 51. More preferably, the viewing directions of the first camera 61 and the second camera 62 are each oriented perpendicular to the rotation center axis CL of the forming drum 51. As shown in FIG. 4, the first camera 61 and the second camera 62 are arranged at an interval R3 along the width direction of the code material 5. The first camera 61 and the second camera 62 are arranged so as to capture the ends of the code material 5 in the width direction, respectively. That is, the first camera 61 is arranged so as to capture the left end 5aL of the first code material 5a and the left end 5bL of the second code material 5b. Further, the second camera 62 is disposed so as to capture an image of a right end portion 5aR of the first code material 5a and a right end portion 5bR of the second code material 5b.

[0032] In this embodiment, the first camera 61 is disposed to the right of the left end 5bL of the second code material 5b. The second camera 62 is disposed to the left of the right end 5bR of the second code material 5b. The first camera 61 is disposed to the left of the second camera 62. In the width direction, the distance between the first camera 61 and the left end 5aL of the first code material 5a is R1. In the width direction, the distance between the second camera 62 and the right end 5aR of the first code material 5a is R2. In the width direction, the distance between the first camera 61 and the left end 5bL of the second code material 5b is R4. In the width direction, the distance between the second camera 62 and the right end 5bR of the second code material 5b is R5. The first camera 61 and the second camera 62 may be, for example, high-speed cameras. The first camera 61 and the second camera 62 are electrically connected to the processing device 90 and controlled by the processing device 90. Furthermore, the distance between the center of the code material 5 and the first camera 61 in the width direction is R6. The distance between the center of the code material 5 and the second camera 62 in the width direction is R7. Since the distance between the first camera 61 and the second camera 62 is R3, R3=R6+R7, and R6 and R7 are the same. However, since an error may occur when mounting the first camera 61 and the second camera 62, "R6 and R7 are the same" may include an error. The number of cameras provided in the inspection system 10 is not limited to two. The inspection system 10 may include only one camera, or may include three or more cameras.

[0033] <First Lighting 63, Second Lighting 64> The first lighting 63 and the second lighting 64 are members that irradiate light onto the code material 5. The first lighting 63 and the second lighting 64 are equipped with, for example, LEDs (Light Emitting Diodes). The first lighting 63 and the second lighting 64 are arranged so as to irradiate light toward the outer peripheral surface of the forming drum 51 at a predetermined angle. The first lighting 63 and the second lighting 64 are arranged at intervals along the width direction of the code material 5 attached to the outer peripheral surface of the forming drum 51 so that the ends of the code material 5 attached to the outer peripheral surface of the forming drum 51 are photographed respectively. As shown in FIG. 4, the first lighting 63 is arranged to the left of the second lighting 64. The first lighting 63 and the second lighting 64 are arranged at an interval R8. The first lighting 63 and the second lighting 64 are arranged outside the first camera 61 and the second camera 62 in the width direction of the code material 5. More specifically, the first lighting 63 is disposed to the left of the first camera 61, and the second lighting 64 is disposed to the right of the second camera 62.

[0034] Here, as shown in FIG. 4, the length of the first code material 5a in the width direction is R1+R2+R3. That is, the interval R8 is longer than R1+R2+R3. The number and arrangement of the lights provided in the inspection system 10 are not particularly limited. The number of lights may be one, or may be three or more. The first light 63 and the second light 64 are equipped with LEDs, but are not limited thereto. For example, the first light 63 and the second light 64 may be equipped with fluorescent lights.

[0035] When the code material 5 is attached to the outer peripheral surface of the forming drum 51, the code material 5 is illuminated by the first lighting 63 and the second lighting 64, and a relatively large amount of light is reflected at the ends of the code material 5. Therefore, the ends of the code material 5 appear linearly. That is, the right end 5aR of the first code material 5a, the left end 5aL of the first code material 5a, the right end 5bR of the second code material 5b, and the left end 5bL of the second code material 5b appear linearly. It is preferable that the angle at which the first lighting 63 and the second lighting 64 irradiate light onto the outer peripheral surface of the forming drum 51 is set so that the linear light reflected by the ends of the code material 5 appears prominently in the images of the code material 5 captured by the first camera 61 and the second camera 62.

[0036] Processing device 90 The processing device 90 is a device that performs various processes of the inspection system 10. The processing device 90 can be embodied by a computer that operates according to a predetermined program. Specifically, each function of the processing device 90 is processed by an arithmetic device (also called a processor, a central processing unit (CPU), or a micro-processing unit (MPU)) and a storage device (such as a memory or a hard disk) of each computer that constitutes the processing device 90. For example, each configuration of the processing device 90 can be embodied as a database that stores data embodied by a computer in a predetermined format, a data structure, a processing module that performs a predetermined arithmetic process according to a predetermined program, or a part of them. Although not shown in the figure, the processing device 90 may be one in which multiple control devices work together. For example, when the processing device 90 of the inspection system 10 is connected to an external computer so as to be able to perform data communication through a LAN cable, the Internet, or the like, the processing of the processing device 90 may be performed in cooperation with such an external computer. For example, the information or a part of the information stored in the processing device 90 may be stored by an external computer, and the processing or a part of the processing performed by the processing device 90 may be performed by an external computer.

[0037] The processing device 90 includes a control PLC 91, a camera controller 92, and a lighting controller 93. The control PLC 91 is a PLC (Programmable Logic Controller) that sends instructions to sequentially execute each process executed by the processing device 90. The control PLC 91 is connected to the camera controller 92 and the lighting controller 93.

[0038] The camera controller 92 is a controller that controls the first camera 61 and the second camera 62. The camera controller 92 is a controller that sends, for example, instructions to the first camera 61 and the second camera 62 to perform shooting and instructions for settings during shooting. The lighting controller 93 is a controller that controls the first lighting 63 and the second lighting 64. The lighting controller 93 is a controller that adjusts the brightness of the light irradiated by the first lighting 63 and the second lighting 64 and switches the first lighting 63 and the second lighting 64 between ON / OFF, for example.

[0039] In this embodiment, the processing device 90 is configured to execute an image acquisition process, an edge extraction process, a width acquisition process, and a deviation amount acquisition process. In this embodiment, the image acquisition process, the edge extraction process, the width acquisition process, and the deviation amount acquisition process are executed in this order by the control PLC 91. Each process executed by the processing device 90 will be described below.

[0040] The image acquisition process is a process of acquiring images of the code material 5 attached to the outer peripheral surface of the forming drum 51, which are captured by the first camera 61 and the second camera 62. First, the camera controller 92 sends an instruction to perform image capture to the first camera 61 and the second camera 62. As a result, the first camera 61 and the second camera 62 capture images of the code material 5. At this time, the first illumination 63 and the second illumination 64 are turned on by the illumination controller 93. In addition, the first illumination 63 and the second illumination 64 irradiate light at a predetermined brightness. FIG. 5 is an example of an image captured by the second camera 62. In FIG. 5, the right end 5aR of the first code material 5a and the right end 5bR of the second code material 5b are captured. In FIG. 5, the inner liner 221 (see FIG. 2) is omitted from the illustration. The processing device 90 acquires the images captured by the first camera 61 and the second camera 62.

[0041] The end extraction process is a process for extracting the position of the end of the extracted code material 5. As described above, when the code material 5 is attached to the outer peripheral surface of the forming drum 51, the light reflected at the end in the width direction of the code material 5 appears linearly. The processing device 90 acquires the position of the light that appears linearly in the acquired image as the position of the end of the code material 5. In this embodiment, the processing device 90 acquires the left end 5aL and the right end 5aR of the first code material 5a. The processing device 90 also acquires the left end 5bL and the right end 5bR of the second code material 5b. In detail, the processing device 90 acquires the left end 5aL of the first code material 5a and the left end 5bL of the second code material 5b from the image captured by the first camera 61. The processing device 90 also acquires the right end 5aR of the first code material 5a and the right end 5bR of the second code material 5b from the image captured by the second camera 62. In the image captured by the first camera 61, the left end 5aL of the first code material 5a and the left end 5bL of the second code material 5b appear as linear light. The processing device 90 acquires the coordinate positions of the left ends 5aL and 5bL. The same is true for the right end 5aR of the first code material 5a and the right end 5bR of the second code material 5b. The end extraction process may extract light irradiated to the cut end 5F of the cut code material 5. In this case, a relatively large amount of light is reflected by the code appearing on the cut surface.

[0042] In order to accurately extract the position of the end of the code material 5 in the end extraction process, it is preferable that the light of the end of the first code material 5a and the second code material 5b is sufficiently visible in the images of the first code material 5a and the second code material 5b captured by the first camera 61 and the second camera 62. If the light of the end of the first code material 5a and the second code material 5b is sufficiently visible, the first lighting 63 and the second lighting 64 may not be present. Alternatively, the first lighting 63 and the second lighting 64 may be turned off as appropriate. In addition, the brightness of the first lighting 63 and the second lighting 64 may be adjusted by the lighting controller 93 so that the light of the end of the first code material 5a and the second code material 5b is sufficiently visible.

[0043] The width acquisition process is a process for obtaining the width of the code material 5 from the ends of the extracted code material 5. In this embodiment, the widths of the first code material 5a and the second code material 5b are obtained. The processing device 90 obtains the distance in the width direction between the position of the left end 5aL of the first code material 5a obtained by the end extraction process and the first camera 61 as R1. Similarly, the processing device 90 obtains the distance in the width direction between the position of the right end 5aR of the first code material 5a and the first camera 61 as R2. Here, as described above, the first camera 61 and the second camera 62 are arranged apart from each other by the distance R3 in the width direction. The processing device 90 obtains the width direction length of the first code material 5a as R1+R2+R3. In the same manner as the width direction length of the first code material 5a, the processing device 90 obtains the width direction length of the second code material 5b as R3+R4+R5.

[0044] The deviation amount acquisition process is a process for acquiring the deviation amount of the cord material 5 from the extracted end of the cord material 5. In this embodiment, the deviation amount of each of the first cord material 5a and the second cord material 5b is acquired. Here, the deviation amount means the amount of deviation between the circumferential direction of the forming drum 51 and the circumferential direction of the cord material 5 molded into an annular shape. The processing device 90 acquires the deviation amount of the first cord material 5a using the interval acquired by the width acquisition process. The processing device 90 acquires the value acquired as |(R1+R6)-(R2+R7)| as the deviation amount of the first cord material 5a. For example, when |(R1+R6)-(R2+R7)|=0, the first cord material 5a is arranged so as to be symmetrical in the width direction. Therefore, at this time, the first cord material 5a is attached to the forming drum 51 without meandering. On the other hand, when |(R1+R6)-(R2+R7)|≠0, the first cord material 5a is shifted to either the right or the left. Therefore, the first cord material 5a is attached to the forming drum 51 in a meandering manner. Similarly, the processing device 90 obtains the value obtained as |(R4+R6)-(R5+R7)| as the amount of shift of the second cord material 5b.

[0045] Thus, the inspection system 10 includes at least one camera 61, 62 arranged toward a predetermined position on the outer circumferential surface of the forming drum 51 so as to capture the code material 5 attached to the forming drum 51, as shown in FIG. 4, and a processing device 90. The processing device 90 is configured to execute a process of acquiring an image of the code material 5 attached to the outer circumferential surface of the forming drum 51, which is captured by the cameras 61, 62. Furthermore, the processing device 90 is configured to execute a process of extracting the ends of the code material 5 from the acquired image of the code material 5. According to this inspection system 10, the right end and the left end of the code material 5 attached to the forming drum 51 can be extracted from the acquired image of the code material 5. Therefore, a single code material 5 attached to the forming drum 51 can be extracted. Furthermore, as shown in FIG. 4, even when the first code material 5a and the second code material 5b are overlapped on the forming drum 51, the right end 5aR and the left end 5aL of the first code material 5a and the right end 5bR and the left end 5bL of the second code material 5b can be extracted. Therefore, the width and the amount of deviation of the first code material 5a and the second code material 5b attached to the forming drum 51 can be inspected. In addition, it is possible to inspect whether the first code material 5a and the second code material 5b of a predetermined width are attached to the forming drum 51 at a predetermined position. In this way, the inspection system 10 can inspect the state of the code material 5 attached to the forming drum 51, and therefore the quality of the manufactured row covers can be improved.

[0046] In the above-described embodiment, the processing device 90 executes the width acquisition process to acquire the width of the cord material 5. This allows the user to check whether the cord material 5 has the desired width. The user can proceed with the process while checking that the cord material 5 has the desired width. As a result, the quality of the manufactured row cover can be improved.

[0047] In the above-described embodiment, the processing device 90 executes the deviation amount acquisition process to acquire the deviation amount in the width direction of the cord material 5. This makes it possible to check whether the cord material 5 is affixed to the forming drum 51 while meandering. The user can proceed with the process while checking that the cord material 5 is not wobbly. As a result, the quality of the manufactured row covers can be improved.

[0048] In the above-described embodiment, the winding device 52 is connected to the rotation axis CL of the forming drum 51. Therefore, the forming drum 51 is configured to be rotatable around the rotation axis CL. The cameras 61 and 62 may be arranged facing the rotation axis CL as described above. In this case, the cameras 61 and 62 can accurately grasp the distances between the cameras 61 and 62 and the forming drum 51, and further the code material 5, with a predetermined position relative to the rotation axis CL as the center. Furthermore, the distance from the position of the code material 5 at which the first camera 61 and the second camera 62 are directed to the end of the code material 5 can also be accurately grasped using trigonometric functions, etc., based on the images of the code material 5 attached to the outer peripheral surface of the forming drum 51 captured by the cameras 61 and 62.

[0049] In the above-described embodiment, the inspection system 10 includes a first camera 61 and a second camera 62. The first camera 61 and the second camera 62 are arranged at a distance R3 from each other. This makes it possible to more accurately extract the code material 5 using the first camera 61 and the second camera 62 even when the code material 5 is relatively long in the width direction.

[0050] In the embodiment described above, the inspection system 10 includes a first illuminator 63 and a second illuminator 64. The angles of the first illuminator 63 and the second illuminator 64 are determined so that more of the light reflected by the multiple codes of the code material 5 is captured by the first camera 61 or the second camera 62. As a result, the brightness of the range in which the code material 5 is captured is relatively high in the images captured by the first camera 61 and the second camera 62. Therefore, the code material 5 can be extracted by the processing device 90 with higher accuracy.

[0051] In the embodiment described above, the first illuminator 63 and the second illuminator 64 are arranged with a distance R8 between them. This allows light to be irradiated to both ends of the code material 5 in the width direction. Therefore, the positions of both ends of the code material 5 are relatively clearly shown in the images captured by the first camera 61 and the second camera 62. This makes it possible to relatively increase the accuracy of the end extraction process by the processing device 90.

[0052] In the above-described embodiment, the inspection system 10 includes the first camera 61, the second camera 62, the first lighting 63, and the second lighting 64. The first camera 61 and the second camera 62 are separated by a distance R3. The first lighting 63 and the second lighting 64 are separated by a distance R8. The distance R8 is longer than the distance R3. That is, the first lighting 63 and the second lighting 64 are disposed on the outer side in the width direction than the first camera 61 and the second camera 62. Compared to the case where the first lighting 63 and the second lighting 64 are disposed on the inner side in the width direction than the first camera 61 and the second camera 62, the first lighting 63 and the second lighting 64 are disposed in a position where the end of the code material 5 can be easily irradiated. As a result, the positions of both ends of the code material 5 are relatively clearly shown in the images captured by the first camera 61 and the second camera 62. Therefore, the accuracy of the end extraction process by the processing device 90 is relatively high.

[0053] The inspection system 10 may include a determination unit that determines whether or not the end position acquired by the end extraction process, the width acquired by the width acquisition process, and the displacement amount acquired by the displacement amount acquisition process are each within a predetermined range. For example, the inspection system 10 may be configured to notify the user of an error when it is determined that any one or more of the end position, width, and displacement amount are not within the respective predetermined ranges.

[0054] Although the invention disclosed herein has been described in various ways, the invention disclosed herein is not limited to the above-mentioned embodiments and modifications unless otherwise specified. Furthermore, the configurations of the various embodiments and modifications mentioned above can be appropriately combined as long as they are not mutually inhibiting.

[0055] The present invention (1) relates to a raw cover molding device. The raw cover molding device according to the present invention (1) is a cylindrical forming drum on whose outer periphery a cord material is attached, the cord material being made of a plurality of cords arranged in a predetermined direction and covered with a topping rubber; At least one camera is arranged toward a predetermined position on the outer circumferential surface of the forming drum so as to capture the code material attached to the forming drum; Processing equipment and having The processing device includes: A process of acquiring an image of the code material attached to the outer peripheral surface of the forming drum taken by the camera; A process of extracting an edge of the code material from the acquired image of the code material; is configured to run.

[0056] The present invention (2) is a raw cover molding apparatus according to (1), The processing device is configured to further perform a process of obtaining a width of the cord material from the extracted ends of the cord material.

[0057] The present invention (3) is a raw cover molding apparatus according to (1), The processing device is configured to further perform a process of obtaining a deviation amount of the code material from the extracted end of the code material.

[0058] The present invention (4) is a raw cover molding apparatus according to (1), The forming drum is configured to be rotatable around a rotation central axis, The camera is disposed facing the central axis of rotation.

[0059] The present invention (5) is a raw cover molding apparatus according to (1), The camera includes two cameras arranged at an interval along the width direction of the code material so that each of the ends in the width direction of the code material affixed to the forming drum is photographed.

[0060] The present invention (6) is a raw cover molding apparatus according to (1), At least one light is provided that is arranged to irradiate light at a predetermined angle toward the outer circumferential surface of the forming drum.

[0061] The present invention (7) is a raw cover molding apparatus according to (6), The lighting includes two lights spaced apart along the width direction of the code material so that each of the width direction ends of the code material affixed to the forming drum is photographed.

[0062] The present invention (8) is a raw cover molding apparatus according to (1), The low cover molding device is provided with a light arranged to irradiate light at a predetermined angle toward the outer circumferential surface of the molding drum, The camera includes two cameras arranged at an interval along the width direction of the code material so that each end of the width direction of the code material attached to the forming drum is photographed, The lighting includes two lighting devices arranged at an interval along the width direction of the code material so that each end of the width direction of the code material attached to the forming drum is photographed, The two lights are positioned outboard of the two cameras in the width direction of the code material.

[0063] The present invention (9) relates to an inspection system. The raw cover molding device according to the present invention (9) is a cylindrical forming drum on whose outer periphery a cord material is attached, the cord material being made of a plurality of cords arranged in a predetermined direction and covered with a topping rubber; At least one camera is arranged toward a predetermined position on the outer circumferential surface of the forming drum so as to capture the code material attached to the forming drum; a processing device; The processing device includes: A process of acquiring an image of the code material attached to the outer peripheral surface of the forming drum taken by the camera; A process of extracting an edge of the code material from the acquired image of the code material; is configured to run.

[0064] The present invention (10) is an inspection system according to (9), The processing device is configured to further perform a process of obtaining a width of the cord material from the extracted ends of the cord material.

[0065] The present invention (11) is an inspection system according to (9), The processing device is configured to further perform a process of obtaining a deviation amount of the code material from the extracted end of the code material.

[0066] The present invention (12) is an inspection system according to (9), The forming drum is configured to be rotatable around a rotation central axis, The camera is disposed facing the central axis of rotation.

[0067] The present invention (13) is an inspection system according to (9), The camera includes two cameras arranged at an interval along the width direction of the code material so that each of the ends in the width direction of the code material affixed to the forming drum is photographed.

[0068] The present invention (14) is an inspection system according to (9), At least one light is provided that is arranged to irradiate light at a predetermined angle toward the outer circumferential surface of the forming drum.

[0069] The present invention (15) is an inspection system according to (14), The lighting includes two lights spaced apart along the width direction of the code material so that each of the width direction ends of the code material affixed to the forming drum is photographed.

[0070] The present invention (16) is an inspection system according to (9), The low cover molding device is provided with a light arranged to irradiate light at a predetermined angle toward the outer circumferential surface of the molding drum, The camera includes two cameras arranged at an interval along the width direction of the code material so that each end of the width direction of the code material attached to the forming drum is photographed, The lighting includes two lighting devices arranged at an interval along the width direction of the code material so that each end of the width direction of the code material attached to the forming drum is photographed, The two lights are positioned outboard of the two cameras in the width direction of the code material. [Explanation of symbols]

[0071] 5, 5a~5d Code materials 5a First cord material 5aL left end 5aR Right end 5b Second cord material 5bL left end 5bR Right end 10 Inspection System 30 Conveyor device 31 Endless Belt 32 Laura 40 Cutting device 51 Forming drum Segment 51a 52 Winding device 61,62 Camera 90 Processing Equipment 91 Control PLC 92 Camera Controller 93 Lighting Controller 100 Low cover molding device 110~114 reel 200 Tires 210 Tread 221 Inner Liner 222 Carcass 223 Cushion Rubber 225 Breaker 226 Undertread rubber 227 Tread Rubber 228 Sidewall rubber CL Rotational axis R1~R8 Interval

Claims

1. a cylindrical forming drum on whose outer periphery a cord material is attached, the cord material being made of a plurality of cords arranged in a predetermined direction and covered with a topping rubber; At least one camera is arranged toward a predetermined position on the outer circumferential surface of the forming drum so as to capture the code material attached to the forming drum; Processing equipment and having The processing device includes: A process of acquiring an image of the code material attached to the outer peripheral surface of the forming drum taken by the camera; A process of extracting an edge of the code material from the acquired image of the code material; configured to run, Low cover molding device.

2. The raw cover forming apparatus according to claim 1 , wherein the processing device is further configured to perform a process of obtaining a width of the cord material from the extracted end portion of the cord material.

3. The raw cover forming apparatus according to claim 1 , wherein the processing device is further configured to execute a process of obtaining a deviation amount of the cord material from the extracted end portion of the cord material.

4. The forming drum is configured to be rotatable around a rotation central axis, The raw cover molding device according to claim 1 , wherein the camera is disposed facing the central axis of rotation.

5. The camera includes two cameras arranged at an interval along the width direction of the code material so that each of the width direction ends of the code material affixed to the forming drum is photographed. The raw cover forming apparatus described in claim 1.

6. 2. The raw cover molding apparatus of claim 1, further comprising at least one light positioned to project light at a predetermined angle toward the outer circumferential surface of the molding drum.

7. The low cover forming apparatus according to claim 6, wherein the lighting includes two lighting units spaced apart along the width direction of the code material so that each of the width direction ends of the code material affixed to the forming drum is photographed.

8. The low cover molding device is provided with a light arranged to irradiate light at a predetermined angle toward the outer circumferential surface of the molding drum, The camera includes two cameras arranged at an interval along the width direction of the code material so that each end of the width direction of the code material attached to the forming drum is photographed, The lighting includes two lighting devices arranged at an interval along the width direction of the code material so that each end of the width direction of the code material attached to the forming drum is photographed, The two lights are disposed on the outer side of the two cameras in the width direction of the code material.

2. The raw cover molding apparatus according to claim 1.

9. An inspection system for inspecting a cord material in which a plurality of cords arranged in a predetermined direction are attached to a cylindrical forming drum and covered with a topping rubber, comprising: At least one camera is arranged toward a predetermined position on the outer circumferential surface of the forming drum so as to capture the code material attached to the forming drum; Processing equipment and having The processing device includes: A process of acquiring an image of the code material attached to the outer peripheral surface of the forming drum taken by the camera; A process of extracting an edge of the code material from the acquired image of the code material; configured to run, Inspection system.

10. 10. The inspection system of claim 9, wherein the processing device is further configured to perform a process of obtaining a width of the code material from the extracted ends of the code material.

11. 10. The inspection system of claim 9, wherein the processing device is further configured to perform a process of obtaining a deviation of the code material from the extracted end of the code material.

12. The forming drum is configured to be rotatable around a rotation central axis, The inspection system of claim 9 , wherein the camera is positioned toward the central axis of rotation.

13. The inspection system according to claim 9, wherein the camera includes two cameras arranged at an interval along the width direction of the code material so that each of the ends of the code material affixed to the forming drum in the width direction is photographed.

14. 10. The inspection system of claim 9, further comprising at least one light positioned to project light at a predetermined angle toward the outer circumferential surface of the building drum.

15. The inspection system according to claim 14, wherein the lighting includes two lighting units arranged at intervals along the width direction of the code material so that each end of the code material affixed to the forming drum in the width direction is photographed.

16. At least one light is provided that is arranged to irradiate light at a predetermined angle toward the outer peripheral surface of the forming drum, The camera includes two cameras arranged at an interval along the width direction of the code material so that each end of the width direction of the code material attached to the forming drum is photographed, The lighting includes two lighting devices arranged at an interval along the width direction of the code material so that each end of the width direction of the code material attached to the forming drum is photographed, The two lights are disposed on the outer side of the two cameras in the width direction of the code material.

10. The inspection system of claim 9.

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