JP4536532B2 - Peripheral surface inspection equipment for cylindrical products - Google Patents

Description

The present invention relates to an outer peripheral surface inspection device for a cylindrical product provided with LED illumination for forming a ring-shaped irradiation pattern.

Conventionally, when a cylindrical product is manufactured, the state of its outer peripheral surface is inspected (for example, Patent Document 1), and as shown in FIG. When irradiating 102, a laser 103 is generally used.
Japanese Patent Application No. 2004-125092

  However, the width of the pattern 102 irradiated with the laser beam is narrow.

  For this reason, when used when inspecting scratches and dents on the outer peripheral surface of the inspection object 101, a decrease in performance was recognized.

This invention is made | formed in view of such a conventional subject, and provides the outer peripheral surface inspection apparatus of the column-shaped product provided with LED illumination which can form the ring-shaped pattern suitable for a test | inspection. It is intended.

In order to solve the above problems, the cylindrical product outer peripheral surface inspection apparatus of the present invention illuminates the outer peripheral surface of the cylindrical product by irradiating a ring-shaped irradiation pattern around the cylindrical product, in the outer peripheral surface inspection apparatus of a cylindrical product to inspect the outer circumferential surface, a plurality of light emitting diodes are arranged along a ring light portion arranged in a ring and the ring light unit before Symbol emitting diodes A cylindrical lens part formed in a ring shape for condensing the diffused light in a specific direction, LED illumination for forming the illumination pattern, a side imaging lens provided in the vicinity of the LED illumination, and the illumination A camera that images the outer peripheral surface of the cylindrical product illuminated with a pattern through the side surface imaging lens .

  That is, a plurality of light emitting diodes are arranged in a ring shape in the ring illumination unit, and light diffuses from each light emitting diode. For this reason, the ring-shaped light irradiated from this ring-type illumination part spreads in the width direction.

  And in the said LED illumination, the ring-shaped cylindrical lens part which condenses the light from each said light emitting diode is arrange | positioned along the said ring-type illumination part. For this reason, the light from each light emitting diode provided in the ring-type illumination unit is irradiated with a width toward a specific direction.

As described above, in the outer peripheral surface inspection apparatus for cylindrical products according to the present invention, a ring-shaped irradiation pattern can be formed by light from light emitting diodes arranged in a ring shape in a ring-type illumination unit. it can. For this reason, compared with the case where a ring-shaped irradiation pattern is formed with a laser beam, a wide ring-shaped irradiation pattern can be formed.

  And in this LED illumination, the ring-shaped cylindrical lens part which condenses the light from each said light emitting diode is arrange | positioned along the said ring-type illumination part. For this reason, the light from each light emitting diode provided in the ring-type illumination unit can be irradiated in a specific direction with a predetermined width. Thereby, the edge part of the ring-shaped irradiation pattern irradiated from the said LED illumination can be sharpened.

  Therefore, the performance can be improved by irradiating the periphery of the inspection object with this LED illumination and using it for inspection of scratches and dents.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
Figure 1 is a diagram showing a testing apparatus 2 is the outer peripheral surface inspection apparatus for cylindrical products with LED lighting 1 according to this embodiment, the said LED lighting 1 to inspect the outer peripheral surface of the cylindrical product It is used in the inspection device 2.

  That is, the inspection object 11 manufactured in the previous process is configured to be conveyed by the belt conveyor 12 so that the inspection object 11 is conveyed upright on the belt conveyor 12. It is configured. The belt conveyor 12 is made of a material and a color that scatters and reflects irradiated light, and examples of the color include a white color.

  An inspection point 22 for inspecting the outer peripheral surface 21 of the inspection object 11 to be conveyed is set in the middle of the belt conveyor 12, and at least the inspection point 22 is not exposed to light from the outside. For example, it is surrounded by a cover.

  In this inspection location 22, the LED illumination 1 for forming a ring-shaped irradiation pattern 31 around the inspection object 11 is provided on the belt conveyor 12 as shown in FIG. As shown in FIG. 1, a side surface imaging lens 32 is provided below the LED illumination 1. A camera 33 is provided above the side surface imaging lens 32.

  Thereby, the light 35 from the LED illumination 1 turned back by the belt conveyor 12 is reflected by the outer peripheral surface 21 of the inspection object 11 and is condensed on the camera 33 by the side imaging lens 32. The state of the outer peripheral surface 21 of the inspection object 11 can be imaged by the camera 33, and the outer peripheral surface of the inspection object 11 is analyzed by analyzing the captured image with an image processing device (not shown). It is comprised so that the damage | wound and dent which were formed in 21 can be test | inspected.

  As shown in FIG. 2, the LED illumination 1 is a device for forming a ring-shaped irradiation pattern 31 on the belt conveyor 12, and includes a ring-type illumination unit 41 disposed on the upper part, and the ring-type illumination unit. The cylindrical lens unit 42 is arranged at a lower portion of the lens 41.

  The ring-shaped illumination unit 41 includes a holder 51 formed in a circular ring shape, and the holder 51 is formed in a U-shaped cross section that opens downward. A circular ring-shaped substrate 52 is accommodated in the holder 51, and light emitting diodes 53 arranged in a ring shape in the circumferential direction are arranged in parallel in three rows in the radial direction. Thereby, as shown in FIG. 3, the light 35 from each of the light emitting diodes 53 is irradiated toward the cylindrical lens portion 42.

  The cylindrical lens unit 42 includes a ring-shaped ring-shaped cylindrical lens 61 disposed along the ring-shaped illumination unit 41, and a support unit 62 that supports the ring-shaped cylindrical lens 61 at the outer periphery. . The ring-type cylindrical lens 61 is formed by forming a general cylindrical lens into a ring shape suitable for the ring-type illumination unit 41, and the cross-sectional shape of the ring-type cylindrical lens 61 is a saddle type in which a central portion projects downward. Is formed.

  Accordingly, the ring-type cylindrical lens 61 is configured to collect the light 35 diffused from each light-emitting diode 53 in the ring-type illumination unit 41 toward the central portion in the width direction. As shown, the ring-shaped irradiation pattern 31 can be formed around the inspection object 11 arranged on the belt conveyor 12.

  The ring illumination unit 41 and the cylindrical lens unit 42 are connected by a support bracket 71 as shown in FIG. 2, and the upper end of the support bracket 71 is connected to the ring illumination unit 41. The holder 51 is fixed. In addition, an elongated hole 72 extending in the vertical direction is formed in the lower end portion of the support bracket 71, and a screw portion extending from the support portion 62 of the cylindrical lens portion 42 is formed in the elongated hole 72. 73 is inserted so as to be movable up and down. As shown in FIG. 3, the screw portion 73 is configured so that a nut 74 can be screwed. By tightening the nut 74, the cylindrical lens portion 42 is fixed to the support bracket 71. It is configured to be determined. As a result, an adjustment mechanism 75 that adjusts the separation distance between the ring illumination unit 41 and the cylindrical lens unit 42 is configured.

  In the present embodiment having the above configuration, a plurality of light emitting diodes 53 are arranged in a ring shape in the ring illumination unit 41 of the LED illumination 1, and light 35 diffuses from each light emitting diode 53. For this reason, the ring-shaped light 35 irradiated from this ring type illumination part 41 can be expanded in the width H direction.

  Thus, the ring-shaped irradiation pattern 31 can be formed by the light 35 from the light-emitting diodes 53 arranged in a ring shape in the ring-type illumination unit 41. For this reason, compared with the case where a ring-shaped irradiation pattern is formed with a laser beam, a wide ring-shaped irradiation pattern 31 can be formed.

  Further, in the LED illumination 1, a ring-shaped cylindrical lens portion 42 that condenses the light 35 from each of the light emitting diodes 53 is disposed along the ring illumination portion 41. For this reason, it is possible to irradiate the light 35 from each light emitting diode 53 provided in the ring illumination unit 41 in a specific direction with a predetermined width H. Thereby, the edge part 81 of the ring-shaped irradiation pattern 31 irradiated from the LED illumination 1 can be sharpened.

  Therefore, the performance can be improved by irradiating the periphery of the inspection object 11 with the LED illumination 1 and using it for inspection of scratches and dents.

  The LED illumination 1 includes an adjustment mechanism 75 that adjusts a separation distance between the ring illumination unit 41 and the cylindrical lens unit 42. For this reason, by changing the fixing position of the cylindrical lens portion 42 with respect to the support bracket 71, the ring-shaped illumination portion 41 that forms the ring-shaped light 35 and the light 35 from each of the light emitting diodes 53 are condensed. The separation distance from the cylindrical lens portion 42 to be adjusted can be adjusted.

  Thereby, focusing by the cylindrical lens part 42 becomes possible, and the edge part 81 of the irradiation pattern 31 is kept sharp by performing focusing according to the separation distance from the LED illumination 1 to the belt conveyor 12. be able to.

It is a schematic diagram which shows one embodiment of this invention. It is a partial cross section figure which shows the principal part of the embodiment. It is sectional drawing which shows the principal part of the embodiment. It is a perspective view which shows the state which irradiated the surrounding part of the test target object in the embodiment. It is a schematic diagram which shows the inspection apparatus of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 LED illumination 2 Inspection apparatus 31 Irradiation pattern 35 Light 41 Ring type illumination part 42 Cylindrical lens part 53 Light emitting diode 75 Adjustment mechanism H Width

Claims (1)

In the outer peripheral surface inspection apparatus for a cylindrical product that irradiates the outer peripheral surface of the cylindrical product by irradiating the peripheral part of the cylindrical product with a ring-shaped irradiation pattern, and inspecting the outer peripheral surface,
A plurality of light emitting diodes formed in a ring shape to condense the light diffused from the previous SL respective light emitting diodes are arranged along a ring light portion which is arranged in a ring and the ring light portion in a particular direction LED lighting comprising a cylindrical lens part and forming the irradiation pattern;
A side imaging lens provided in the vicinity of the LED illumination;
A camera that images the outer peripheral surface of the cylindrical product illuminated by the irradiation pattern via the side surface imaging lens;
An apparatus for inspecting the outer peripheral surface of a columnar product, comprising:

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