JP2000081323A - Inspecting instrument for surface of round bar, round bar and printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve the shortening of inspection time and the curtailing of the cost of an inspecting instrument while improving inspection accuracy in an appearance inspecting method of a round bar. SOLUTION: This visual inspection instrument for round bars is provided with a rotation device 10, a linear light flux illuminating device 20 for irradiation at a specified angle and a scattered light illuminating device 40, a line sensor camera 50 for taking in line image information, an image processor 70 which synthesizes multiple pieces of image information to be converted into an area image information and judges the quality of a round bar 100 and a controller 80 to control the operation of the rotation device 10, the image processor 70 and an illumination changeover controller 90.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an inspection apparatus for inspecting the appearance of a round bar having a metal surface or a paint uniformly applied thereon, a round bar inspected by the inspection apparatus, and an apparatus provided with the round bar. For example, it relates to a printing apparatus.

[0002]

2. Description of the Related Art Conventionally, when inspecting the surface of a round bar having a metal surface or a uniform coating of paint, the surface shape and dimensions are measured while rotating the round bar using a laser displacement measuring device. Furthermore, while moving the laser displacement measuring device in the direction of the long procedure correction of the round bar, the surface shape and dimensions of the entire round bar are measured, and the quality of the surface of the round bar is inspected.

[0003] In addition, when inspecting the surface of a round bar in which a solid material is mixed in a paint, the surface cannot be measured by a laser displacement measuring device, so that the inspection is performed by visual inspection. Hereinafter, a conventional round bar surface inspection apparatus will be described with reference to FIG.

FIG. 4 shows a method of inspecting a metal bar or a round bar surface on which a paint is uniformly applied. The round bar 100 is set on the rotating device 10, and the measurement position of the laser displacement measuring device 210 is adjusted to the vertex position of the round bar 100. The rotating device 10 is operated by the measurement control device 200 to
Rotate 00. Measurement control device 2 while measuring the displacement amount of one round of round bar 100 with laser displacement measurement device 200
At 00, the surface shape of the entire surface of the round bar is measured by moving the X moving table 220 in the direction of the arrow E. The quality of the round bar surface shape is determined by sending the measured data to the device 230 for calculating the measured data of the laser displacement measuring device 200 and processing the measured data.

In the case of inspecting the surface of a round bar in which a solid material is mixed in a coating material, the laser light is scattered by the solid material in the laser displacement measuring device 200 and cannot be measured. Therefore, it is performed by visual inspection.

[0006]

However, in the above-mentioned conventional round bar surface inspection apparatus, it takes time for the laser displacement measuring device to capture the displacement of the entire surface of the round bar, and the captured data is not sufficient. It is enormous and it takes time to calculate the quality. On the other hand, if the inspection is to be performed at a high speed, it is necessary to increase the number of laser displacement measurement devices and the number of calculation devices for judging pass / fail, which causes an increase in the cost of the inspection process.

Another problem is that automatic inspection cannot be performed when inspecting the surface of a round bar having a surface on which a solid matter is mixed in a paint.

Therefore, the present invention improves the accuracy of the round bar surface inspection, reduces the cost of the inspection process, and shortens the inspection time. It is an object of the present invention to provide a round bar surface inspection apparatus that enables inspection of the surface of a round bar coated on a surface.

[0009]

According to a first aspect of the present invention, there is provided a round bar surface inspection apparatus for rotating a round bar, which is an object to be inspected, and a round bar on the rotary device for applying a linear light beam. A linear beam illuminating device 20 for irradiating the irradiating device 100 with a predetermined angle;
A scattered light illuminating device 40 for irradiating 0 at a predetermined angle
And an illuminating device selecting device 40 for selecting one of the linear light illuminating device 20 and the scattered light illuminating device 40 as an illuminating device for irradiating the round bar 100 on the rotating device 10.
And a line sensor camera 60 for capturing line image information of the round bar illuminated by the lighting device, and a plurality of line image information captured by the line sensor camera 60 are combined and converted into area image information. An image processing device 70 for determining the quality of the surface of the round bar based on the converted area image information, and a control device for controlling the operations of the rotation device 10, the illumination device selection device 40, and the image processing device 70. 80, the line sensor camera 6
By rotating the round bar once with the rotating device 10 while taking the value to 0, image information of the entire round bar can be obtained at once.
For this reason, image information on the surface of the round bar can be captured at a higher speed than an apparatus that captures the surface shape data of the round bar in the length direction while rotating the round bar, and the inspection processing time is shorter. Further, a mechanism for moving a device for obtaining surface shape data in the length direction of the round bar is not required, so that the cost of the inspection device can be reduced.

According to a second aspect of the present invention, there is provided a round bar surface inspection apparatus according to the first aspect, wherein the line sensor camera 60 is configured so that the linear luminous flux from the linear luminous flux illuminating device 20 is circular. The light reflected by the surface of the rod 100 and the scattered light from the scattered light illuminating device 40 are arranged to receive the light reflected by the surface of the round rod 100.

According to the above configuration, the linear light beam illuminating device 20
Then, a linear light beam applied to the round bar 100 is reflected on the surface of the round bar 100, and the reflected light is captured by the line sensor camera 60 to obtain a surface shape image of the round bar 100. Since the reflected light accurately reflects the irregularities on the surface of the round bar 100, the quality of the surface of the round bar 100 can be easily determined. Further, the scattered light emitted from the scattered light illuminating device 40 to the round bar 100 is reflected on the surface of the round bar 100, and the reflected light is captured by the line sensor camera 60 so that the round bar 100
Is obtained. Since the reflected light is diffuse reflection light, even if the reflectance of the surface of the round bar is high, irregularities on the surface of the round bar 100 can be accurately captured as line image information, and the quality of the surface of the round bar 100 can be determined. Easy and accurate.

In the round bar surface inspection apparatus according to claim 1 or 2, the arrangement angle A between the line sensor camera 60 and the line illumination device 20 is in the range of 10 degrees to 80 degrees (claim 3). Is preferred.

By setting the angle A to 80 degrees or less, a more accurate surface image of the round bar can be obtained, and the effect of obtaining the installation space for the line sensor camera 60 and the line illumination device 20 can be obtained. By doing so, it is possible to obtain an effect that only image information of only the convex portion on the surface of the round bar is obtained and the inspection becomes easy.

In the round bar surface inspection apparatus according to claim 1 or 2, the arrangement angle B between the line sensor camera 60 and the scattered illumination device 40 is 20 to 70 degrees (claim 4).
Is preferably within the range.

By setting the angle B to 70 degrees or less, even if the surface of the round bar is a highly reflective surface, an accurate surface image of the round bar can be obtained, and the installation space for the line sensor camera 60 and the scattering illumination device 40 can be obtained. When the angle is set to 20 degrees or more, a difference in the partial reflectance of the surface of the round bar can be obtained as image information, and the inspection can be easily performed.

In the round bar surface inspection apparatus according to any one of claims 1 to 4, it is preferable that the focus position of the line sensor camera 60 is near the vertex C of the round bar 100 (claim 5). The position is 2 from the vertex C of the round bar 100
It is more preferably within the range D of mm.

According to the above configuration, the linear light beam irradiated on the round bar 100 reflects only the reflected light that is reflected on the surface of the round bar 100 within the focal position of the line sensor camera 60. The image can be captured by the line sensor camera 60, and only the shadow image of the projection 120 can be effectively obtained.

According to a seventh aspect of the present invention, there is provided a round bar surface inspection apparatus according to the first or second aspect, wherein the linear light beam illumination device 20 and the scattered light illumination device 40 are selected. It is characterized in that two round bar surface images with different lighting methods are created, and the quality of the round bar surface is judged based on the two round bar surface images.

According to the above configuration, the linear light beam illuminating device 20
The pass / fail judgment is performed using two types of images, ie, a shadow image of the convex portion 120 due to the difference in the reflectance of the scattered illumination device 40 on the surface of the round bar, and the inspection accuracy is increased.

According to an eighth aspect of the present invention, in the round bar surface inspection apparatus according to any one of the first to seventh aspects, the quality of the coating on the surface of the round bar is determined. For this reason, even if the surface of the round bar is coated with the paint, it is possible to easily obtain an image necessary for the inspection, and it is possible to accurately judge the quality of the coating on the surface of the round bar.

The round bar according to the ninth aspect is the same as the first to eighth aspects.
The inspection was carried out using the round bar surface inspection device according to any one of the above.

For this reason, this round bar can be provided with a short delivery time and has a low price because the inspection processing time and the inspection cost are reduced, and has a high quality because the quality judgment is performed accurately. There is an effect that there is.

According to a tenth aspect of the present invention, there is provided a printing apparatus including the round bar according to the first aspect as a paper feed roller.

For this reason, this printing apparatus has the effect of high quality and low price.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on examples.

(Embodiment 1) FIG. 1 is a diagram showing a main part of a round bar surface inspection apparatus of Embodiment 1. This round bar surface inspection apparatus includes a rotating device 10 for rotating a round bar, a linear light beam illuminating device 20, a scattered light illuminating device 40, and an illumination switching device 4
0, the line sensor camera 60, and the image processing device 70
And a control device 80. The rotating device 10 mounts the round bar 100 to be inspected and rotates the round bar 100. An illumination power supply 30 is connected to the linear light beam illuminating device 20, and can irradiate a linear light beam. The illumination power supply 50 is connected to the scattered light illuminating device 40 and can irradiate the scattered light. Line sensor camera 60
Captures line image information. The image processing device 70 combines a plurality of pieces of line image information captured by the line sensor camera 60, converts the combined information into area image information, and determines the quality of the round bar 100 based on the area image information. Control device 80
Controls the rotation speed, the rotation direction, the rotation start, and the rotation end of the rotation device 10 and controls the start and the end timing of the capture of the line image information by the image processing device 70.

Here, as a configuration for capturing the image of the round bar 100, a line sensor camera 60 is provided at a position where the linear beam illuminating device 20 and the scattered light illuminating device 40 receive the light reflected by the surface of the round bar 100 and reflected. Was installed. Then, while rotating the round bar 100 by the rotation of the rotation device 10, the line sensor camera 60 takes in a plurality of the line image information and the image processing device 70 combines the plurality of line image information with the area image information. As a result, area shape image information on the surface of the round bar 100 is directly obtained at a time. Based on the area shape image information, the image processing device 70 can determine the quality of the round bar surface appearance.

The installation angle A of the linear light beam illuminating device 20 and the line sensor camera 60 shown in FIG. 2 is 10 to 80 degrees, preferably 50 to 80 degrees, depending on the surface inspection accuracy of the convex portion 120 of the round bar 100. Degrees, particularly preferably from 60 degrees to 8 degrees.
0 degrees. If it is larger than this range, the convex portion 1 of the round bar 100
There is a tendency that an uneven image of the surface of the round bar 20 cannot be captured. On the other hand, if it is too small, an image other than the surface image of the convex portion 120 of the round bar 100 tends to be captured.

The installation angle B of the scattered light illuminating device 40 and the line sensor camera 60 shown in FIG. 2 depends on the surface glossiness of the round bar 100, and is preferably 20 to 70 degrees, and more preferably 20 to 4 degrees.
0 degree, particularly preferably 20 degrees to 30 degrees. If it is smaller than this range, there is a tendency that an uneven image on the surface of the round bar 100 cannot be taken in. On the other hand, if it is too large, there is a tendency that there is no difference between the surface reflection images of the round bar 100.

The line sensor camera 60 shown in FIG.
Is 2 mm around the vertex C of the round bar 100.
The following is preferred. If the focal position dimension D of the line sensor camera 60 becomes large, there is a possibility that the surface image of the convex portion 120 of the round bar 100 may not be captured, and the convex portion of the round bar 100 may be rotated due to rotation of the round bar and variation in the diameter of the round bar. There is a tendency that 120 surface images cannot be captured.

According to the above-described configuration, since only the surface image of the convex portion 120 of the round bar 100 and the image of the difference in the reflectance of the round bar surface can be captured at one time, the inspection time can be reduced. Become. In addition, the projection 120 of the round bar 100 is directly provided.
Since the quality can be determined by taking in the surface image, the inspection accuracy can be improved, the inspection time can be shortened, and the cost of the inspection apparatus can be reduced.

Further, when a high-quality round bar determined to be good or bad by the round-bar visual inspection device of the present invention is used as a paper feed roller which is a component of the printing device, a high-quality and low-cost printing device is realized. did it.

[0033]

As described above, according to the round bar appearance inspection apparatus of the present invention, the light beam of the line illumination is emitted obliquely while rotating the round bar, and the reflected light is taken into the line sensor camera. The scattered illumination light is emitted obliquely and the reflected light is taken into the line sensor camera to capture the image of only the inspection part of the round bar at a time. Can be reduced.

[Brief description of the drawings]

FIG. 1 is a main part view of a round bar appearance inspection apparatus according to a first embodiment.

FIG. 2 is a main part view of a round bar appearance inspection apparatus according to a second embodiment.

FIG. 3 is a layout diagram of a lighting device and a line sensor camera.

FIG. 4 is an explanatory view of a conventional round bar appearance inspection apparatus.

[Explanation of symbols]

10. Rotating device 20. Linear light beam illumination device 30. Power supply for linear luminous flux illumination device 40. Scattered light illumination device 50. Power supply for scattered light illumination device 60. Line sensor camera 70. Image processing device 80. Control device 90. Lighting switching control device 100. Round bar 110. Lighting switch 120. Round bar surface convex part A. B. Installation angle of linear light beam illuminating device 20 and line sensor camera 50 B. Installation angle of scattered light illumination device 40 and line sensor camera 50 Round bar vertex D. Focus position dimensions

Claims (10)

[Claims] 1. A rotating device 10 for rotating a round bar 100 as an object to be inspected, and a linear light beam illuminating device 20 for irradiating a linear beam on the round bar 100 on the rotating device 10 at a predetermined angle. A scattered light illuminating device 40 for irradiating the round bar 100 on the rotating device 10 with a scattered light at a predetermined angle; and a linear luminous flux illuminating device 20 as an illuminating device for irradiating the round bar 100 on the rotating device 10. Light illumination device 40
Lighting device selecting device 110 for selecting any of
And a line sensor camera 60 for capturing line image information of the round bar irradiated by the lighting device; and converting a plurality of line image information captured by the line sensor camera 60 into area image information. An image processing device 70 for determining the quality of the surface of the round bar based on the converted area image information; and a control device for controlling the operations of the rotation device 10, the illumination device selection device 110, and the image processing device 70. 80
A surface inspection device for a round bar, comprising: 2. The round bar surface inspection device according to claim 1, wherein the line sensor camera 60 is configured to determine whether the linear light beam from the linear light beam illuminating device 20 is reflected by the surface of the round bar 100 and The scattered light from the scattered light illuminating device 40 is
A round bar surface inspection apparatus, which is arranged so as to be able to receive light reflected on a surface of the round bar. 3. The round bar surface inspection device according to claim 1, wherein the line sensor camera 60 and the linear light beam illumination device 2
A round bar surface inspection device, wherein an arrangement angle A with 0 is within a range of 10 degrees to 80 degrees. 4. The round bar surface inspection device according to claim 1, wherein the line sensor camera 60 and the scattered light illumination device 40.
The arrangement angle B of the round bar is in the range of 20 to 70 degrees. 5. The round bar surface inspection apparatus according to claim 1, wherein a focal position of the line sensor camera 60 is near a vertex C of the round bar 100. 6. The round bar surface inspection apparatus according to claim 1, wherein the focus position of the line sensor camera 60 is within a range D of 2 mm from the vertex C of the round bar 100. Inspection equipment. 7. The round bar surface inspection apparatus according to claim 1 or 2, wherein the linear light beam illuminating device 20 and the scattered light illuminating device 40 are selected to obtain two round bar surface images having different illumination methods. A round bar surface inspection apparatus which is created and judges the quality of the round bar surface based on the round bar surface image. 8. A round bar surface inspection apparatus according to claim 1, wherein the quality of said round bar surface coating is judged. 9. A round bar inspected by using the round bar surface inspection apparatus according to claim 1. 10. A printing apparatus comprising the round bar according to claim 9 as a paper feed roller.