JP2013092395A - Defect inspection system and marking method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a defect inspection system capable of continuously performing optimal marking by dispensing with position adjusting work of marking means, and to provide a marking method.SOLUTION: A defect inspection system 1 comprises: a motor (21) including a cam (22) at a rotary shaft; a driving link (23) one end of which is connected to the cam, the other end of which includes marking means (23a), and that reciprocates according to the rotation of the cam and causes the marking means to mark; an input unit (24) that inputs a setting value for defining a driving range; and a control unit (25) that causes the motor to normally rotate or inversely rotate according to the setting value input from the input unit, so as to reciprocate the marking means.

Description

  The present invention relates to a defect inspection system including a marking device and a marking method.

  2. Description of the Related Art A defect inspection system is known that includes a defect inspection apparatus that detects a defective portion using a continuous sheet-like material made of synthetic resin or the like as an inspection target, and a marking device that performs marking on the detected defective portion. For example, Patent Document 1 discloses such a defect inspection system.

JP 2007-114138 A

In the defect inspection system, marking means in the marking device, for example, the pen tip of the felt pen cannot be marked due to premature wear, or the pen tip is crushed and excess ink flows out to form a continuous sheet. Problems such as soiling can occur. In dealing with such a problem, there are problems described below.
FIG. 4 is a diagram showing a configuration of a marking device 90 used in the defect inspection system.
The marking device 90 includes an AC servo motor 91, a drive cam disk 92, and a drive link 93.
When the AC servomotor 91 receives a drive start signal for instructing marking on a defective portion from a defect inspection apparatus (not shown), the AC servomotor 91 starts the rotation operation of its own rotation shaft 91a. The drive cam disk 92 is fixed to the rotation shaft 91a of the AC servomotor 91, and rotates around the rotation shaft 91a. Further, the drive link 93 converts the rotational motion of the drive cam disk 92 into a vertical motion in a direction perpendicular to the inspection object 3 (continuous sheet-like material).

  The drive link 93 is fixed at one end to a holding member 93b that holds the marking means 93a by a connecting member 93c, and is fixed to the outer peripheral portion of the drive cam disk 92 at the other end by a connecting member 92a. The drive link 93 brings the tip of the marking means 93a into contact with the inspection object 3 when the center point in the vertical direction of the connecting member 93c comes to the position of the bottom dead center BDC (Bottom Dead Centre). Then, the marking device 90 performs marking indicating the defect by bringing the marking means 93a into contact with the position of the defect on the inspection object 3 perpendicularly. As shown in FIG. 4, the bottom dead center BDC is drawn perpendicularly to the inspection object 3 from the rotation shaft 91a and a circle C92 having a radius R92 from the center of the rotation shaft 91a to the center of the connecting member 92a. This is indicated by the intersection with the straight line L90.

As described above, the marking device 90 is configured to mark the inspection object 3 by the marking means 93a at the bottom dead center of the rotational movement of the drive cam disk 92. Therefore, when the above-described problem such as wear of the pen tip occurs, the area where the pen tip comes into contact with the inspection object 3 decreases or does not come into contact, so that the marking cannot be visually recognized.
If it does so, position adjustment by the hand of adjusting the distance with respect to the test object 3 of the marking means 93a by loosening the connection of the connection member 93c and the holding member 93b, and fixing the connection of the connection member 93c and the holding member 93b after that will be carried out. Work is required. In this position adjustment operation, the distance of the marking means 93a with respect to the inspection object 3 is finely adjusted with a micrometer or the like, and the shape of the marking is confirmed visually to determine the position of the marking means 93a when the optimum marking is achieved. It was. As described above, the conventional defect inspection system has a problem that manual adjustment is required for the position adjustment of the marking means.

In addition, this position adjustment operation may occur frequently in the inspection process, for example, about two or three times a day during continuous operation. Since the inspection process is generally performed in a clean room, it is necessary to enter the clean room for adjustment, stop the inspection line, and perform the above-described position adjustment work.
Therefore, as the ratio of the work time for adjusting the position of the marking means to the inspection time increases, there is a problem that it becomes difficult to continuously apply the optimum marking to the inspection object.

  The present invention has been made in view of the above points, and it is an object of the present invention to provide a defect inspection system that does not require a complicated manual position adjustment operation and can continuously perform optimum marking.

  In order to solve the above problems, a defect inspection system of the present invention is a defect inspection system for detecting and marking a defective portion present in a moving inspection object, and a motor having a cam provided on a rotating shaft, , One end is connected to the cam, and the other end is provided with marking means, and a drive link for marking by the marking means by reciprocating according to the rotation of the cam, and an input for inputting a set value for defining a driving range And a control unit that reciprocates the marking unit by rotating the motor forward and backward according to the set value input from the input unit.

  In the defect inspection system according to the present invention, the input unit inputs a set value for designating a range in which the marking unit reciprocates, and the control unit has a rotation angle corresponding to the range in which the reciprocation is performed. The motor is rotated forward and backward in accordance with a range.

  In the defect inspection system according to the present invention, the input unit is installed in a place other than a work room in which the marking unit is provided.

  In order to solve the above problems, the marking method of the present invention includes a motor having a cam on a rotating shaft, one end connected to the cam, and a marking means at the other end. And a drive link for marking by the marking means by reciprocating in accordance with a method for detecting and marking a defective portion present in a moving inspection object, wherein a drive range is defined An input step for inputting a set value into the input unit, and a motor switching step in which the control unit for reciprocating the marking means causes the motor to perform normal rotation and reverse rotation according to the set value input from the input unit. It is characterized by having.

  According to the present invention, the marking means is reciprocated according to the set value input from the input unit. Thereby, the range in which the marking means reciprocates can be changed according to the set value set from the input unit. Therefore, the marking state can be easily adjusted.

  That is, it is possible to provide a defect inspection system that eliminates the need for manually adjusting the position of the marking means and can continuously perform optimum marking. Further, by performing input of a set value that defines the drive range from the input unit, adjustment work can be performed without stopping the inspection process.

It is a schematic structure figure of defect inspection system 1 concerning this embodiment. It is a figure for demonstrating the marking apparatus 20 in the defect inspection system 1. FIG. 2 is a schematic configuration diagram of an input device 24 in the defect inspection system 1. FIG. It is a figure for demonstrating the marking apparatus 90 in a defect inspection system.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic configuration diagram of a defect inspection system 1 according to the present embodiment.
A part of the defect inspection system 1 is provided in the control room 2a, and the remaining part is provided in the clean room 2b.
The defect inspection system 1 includes an image processing device 13, an input device 24, and a control unit 25 in the control room 2a. Further, the defect inspection system 1 includes a lighting device 11, a line sensor 12, and a defect marking device 20 in a clean room 2b.
An inspection line for inspecting defects existing on the surface of the continuous sheet-like inspection object 3 includes a supply roll 4 around which the inspection object 3 is wound, a conveyance roll 5a, and a conveyance in the clean room 2b. A take-up roll 6 that winds up the inspection object 3 via the roll 5b is provided.

  The inspection object 3 is a continuous sheet-like metal plate, film, cloth, non-woven fabric, resin plate, etc., which is pulled out from the supply roll 4 on the inspection line and moved by being transported by the transport roll 5a and the transport roll 5b. To do.

  The defect inspection apparatus 10 receives an illumination device 11 that irradiates light onto the surface of the inspection object 3 that moves between the conveyance roll 5a and the conveyance roll 5b, and reflected light from the inspection object 3, and receives the image. A line sensor 12 for obtaining a signal and an image processing device 13 for processing the image signal are provided.

The illuminating device 11 is a line-shaped illuminating device arranged so that the longitudinal direction of the light irradiation range on the inspection object 3 is orthogonal to the moving direction of the inspection object 3, for example, a fluorescent lamp, rod illumination, Examples include optical fiber illumination.

The line sensor 12 is a line-shaped optical sensor arranged so that the longitudinal direction of the imaging range is orthogonal to the moving direction of the inspection object 3, receives reflected light from the inspection object 3, and receives the inspection object 3. An image signal corresponding to the light intensity distribution on the surface is output. An example of the line sensor 12 is a CCD (Chrage Coupled Device) camera.
In the illustrated example, the line sensor 12 is arranged on the surface side of the inspection object 3 in the same manner as the illumination device 11. It is good also as a structure which arrange | positions the illuminating device 11 to the back side of the test target object 3 opposite to the line sensor 12, irradiates light from the back surface of the test target object 3, and the line sensor 12 receives transmitted light.

  When the image processing apparatus 13 processes the image signal output from the line sensor 12 according to a predetermined program and detects a defect existing on the inspection object 3, the image processing apparatus 13 detects that the defect has been detected, and A marking start signal Start indicating the defect position information indicating the position in the width direction and the position in the movement direction is output to the marking device 20.

The marking device 20 includes an AC servo motor 21, a drive cam disk 22, and a drive link 23. When the AC servomotor 21 receives a marking start signal Start instructing marking on the defective portion of the inspection object 3 from the image processing device 13, the AC servomotor 21 itself responds to the rotation angle setting signal AS input from the control unit 25. The rotation operation of the rotation shaft 91a is started. In FIG. 1, counterclockwise rotation is normal rotation and clockwise rotation is reverse.
The drive cam disk 22 is a circular disk, and the center of the disk is fixed to the rotating shaft 21 a of the AC servomotor 21, and rotates around the rotating shaft 21 a according to the rotation of the AC servomotor 21.

The drive link 23 converts the rotational movement of the drive cam disk 22 into vertical movement in the direction perpendicular to the inspection object 3.
One end of the drive link 23 is connected to the circumferential portion of the drive cam disk 22 by a connecting member 22a (for example, a pin and a retaining ring).
Further, the drive link 23 is connected at the other end to a holding member 23b that holds the marking means 23a by a connecting member 23c (for example, a pin and a retaining ring).
The holding member 23b of the marking means 23a and the marking means 23a connected by a connecting member 23c (for example, a pin and a retaining ring) are always linearly moved in a vertical direction with respect to the inspection object 3 by a linear guide 28 (not shown in FIG. 1). (Details will be described later).

  As the marking means 23a, for example, a marking pen whose tip is a pen tip and the pen tip is integrated with a pen shaft for storing ink can be cited. As the pen tip constituting the tip portion, a relatively soft material, for example, a felt bundle is used in that there is no possibility of damaging the inspection object 3.

The input device 24 allows a worker in the control room 2a to manually input a distance between the marking means 23a and the inspection object 3, and a signal corresponding to this distance (hereinafter referred to as a distance Dα) is controlled by the control unit. Is output to 25.
Based on this distance Dα, the control unit 25 generates a rotation angle setting signal AS for designating an angle (which is also the end point of the connecting member 22a) for switching the rotation of the rotation shaft of the AC servomotor 21 from normal rotation to reverse rotation. Output to the motor 21.

As described above, the defect inspection system 1 includes a marking device 20 having a motor (AC servomotor 21) provided with a cam (driving cam disk 22) on a rotating shaft (rotating shaft 21a),
One end is connected to the cam, the other end is provided with marking means (marking means 23a), and has a drive link (drive link 23) for marking by the marking means by reciprocating according to the rotation of the cam. Yes.
The defect inspection system 1 also includes an input unit (input device 24) that inputs a set value (distance Dα) that defines a driving range, and rotates the motor forward and backward according to the set value input from the input unit. A control unit (control unit 25) that reciprocates the marking means.

The operator inputs a set value (distance Dα) for designating a range in which the marking means 23a reciprocates in the input device 24 in the control room 2a. The control unit 25 outputs a rotation angle setting signal AS to the AC servomotor 21 in accordance with the rotation angle range corresponding to the set value. In accordance with the rotation angle setting signal AS, the AC servomotor 21 rotates and rotates the rotating shaft 21a, and reciprocates the drive link 23 and the marking means 23a connected via the drive cam disk 22. The reciprocating motion represents an operation in which the drive link 23 or the marking means 23a reciprocates in the linear direction that is the longitudinal direction by driving the AC servomotor 21.
Then, when the rotating shaft 21a of the AC servomotor 21 is rotated from normal rotation to reverse rotation, the marking means 23a comes into contact with the defective portion of the inspection object 3.

Thus, according to the present invention, the marking means (marking means 23a) is reciprocated according to the set value (distance Dα) input from the input unit (input device 24). Thereby, the range in which the marking means reciprocates can be changed according to the set value set from the input unit. Therefore, the marking state can be easily adjusted.
That is, it is possible to provide a defect inspection system that eliminates the need for manually adjusting the position of the marking means and can continuously perform optimum marking. Further, by performing input of a set value that defines the drive range from the input unit, adjustment work can be performed without stopping the inspection process.

  As a specific example, the AC servomotor 21 starts rotating motion from normal rotation at the end point before the center of the connecting member 22a comes to the bottom dead center position according to the rotation angle setting signal AS output from the control unit 25. Switch to reverse. When this AC servomotor 21 switches the rotation from normal rotation to reverse rotation, the drive link 23 also changes the direction of operation from descending to ascending. As a result, the center of the connecting member 22a is positioned at the end point before the bottom dead center position, the distance between the center of the connecting member 22a and the inspection object 3 is minimized, and the tip of the marking means 23a. In this way, the marking device 20 abuts the tip of the marking means 23a perpendicularly to the inspection object 3 and marks the inspection object 3 with a defect as shown in FIG. (Details will be described later).

Hereinafter, a specific configuration and operation of the marking device 20 will be described in detail.
FIG. 2 is a diagram for explaining the marking device 20.
2, the same parts as those in FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted.
As shown in each of FIGS. 2A to 2C, a longitudinal direction of a support plate (not shown) provided perpendicularly to the inspection object 3 is positioned behind the holding member 23 b on the inspection object 3. The linear guide rail 28a is fixed so as to be perpendicular to. The sliding block 28 b is a sliding member that performs a linear motion on the straight guide rail 28 a in the vertical direction, that is, perpendicular to the inspection object 3. The sliding block 28b and the linear guide rail 28a constitute a linear guide 28. The sliding block 28b of the linear guide 28 is fixed to the holding member 23b so as to sandwich the marking means 23a between the linear guide 28 and holds the marking means 23a together with the holding member 23b. Thereby, the linear guide 28 reciprocates the marking means 23a along the vertical line L0 with respect to the inspection object 3 in accordance with the rotational movement of the drive cam disk 22 together with the drive link 23.

  FIG. 2A shows a state in which the tip of the marking means 23 a is in contact with the inspection object 3. In FIG. 2A, a straight line L0 indicates a straight line that passes through the center of the rotation shaft 21 a of the AC servomotor 21 and is perpendicular to the inspection object 3. The straight line L1 is a straight line that is perpendicular to the straight line L0, passes through the center of the rotation shaft 21a, is the diameter direction of the drive cam disk 22, and is parallel to the inspection object 3. The radius R22 indicates the distance between the center of the rotating shaft 21a of the AC servomotor 21 and the center of the connecting member 22a. A circle C22 indicates the circumference of a radius R22 with the center of the rotation shaft 21a of the AC servomotor 21 as the center of the circle.

In a state where the tip of the marking means 23a is in contact with the inspection object 3, a straight line (referred to as a straight line L2) passing through the center of the rotating shaft 21a of the AC servomotor 21 and the center of the connecting member 22a is a straight line L1 and a circle C22. The angle α (0 ≦ α ≦ 90 °) is formed in the counterclockwise direction, and the center of the connecting member 22a is located at the end point ME. This end point ME is different from the bottom dead center BDC that is the intersection of the straight line L1 and the circle C22.
That is, if the AC servomotor 21 switches the rotational movement from normal rotation to reverse when the angle formed by the straight line L1 and the straight line L2 is the angle α in accordance with the rotation angle setting signal AS, the drive link 23 is also lowered. The direction of operation can be changed to ascending, and the center of the connecting member 22a can be positioned at the end point ME. As a result, the center (end point ME) of the connecting member 22a is the minimum distance from the inspection object 3, and the tip of the marking means 23a contacts the inspection object 3.

FIG. 2B shows a state where the tip of the marking means 23 a is separated from the inspection object 3 by a distance Dα. That is, the center of the connecting member 22a is located on the straight line L1.
Here, the relationship between the distance Dα and the angle α (°) shown in FIG. 2A is approximately expressed by the following equation (1).
Distance Dα = radius R22 × sin (2π × angle α / 360) (1)
For example, if the radius R22 = 16 mm and the distance Dα = 6.78 mm, the angle α = 25.07 °.

  Therefore, when an operator in the control room 2a inputs the distance Dα to the input device 24 shown in FIG. 1, the control unit 25 calculates an angle α formed by the straight line L1 and the straight line L2 based on the equation (1). When the AC servo motor 21 reaches this angle α, the rotation of the rotary shaft 21a is switched from normal rotation to reverse rotation. Thereby, the center (end point ME) of the connecting member 22a is the minimum distance from the inspection object 3, and the tip of the marking means 23a can be brought into contact with the inspection object 3.

  Further, as shown in FIG. 2A, the end point ME of the connecting member 22a is set to a position different from the bottom dead center BDC that is the intersection of the straight line L1 and the circle C22. For this reason, even when the tip of the marking means 23a is worn away and the distance Dα is increased, the operator in the control room 2a resets the distance Dα from the input device 24, and the control unit 25 responds to the distance Dα. By resetting the angle α, the tip of the marking means 23a can be brought into contact with the inspection object 3 as shown in FIG.

  For example, when the distance Dα = 6.79 mm, the angle α = 25.11 ° from the equation (1), and when the distance Dα = 6.80 mm, the angle α = 25 from the equation (1). .15 °. As described above, in this embodiment, when the distance Dα is changed by 10 μm by the input device 24, the angle α can be changed by 0.04 °. Therefore, the tip of the marking means 23a is inspected at any angle α. 3 can be brought into a contact state.

  Thus, even if the distance Dα changes, the changed distance Dα is input to the input device 24 shown in FIG. 1, and the rotation of the rotary shaft 21a is corrected at the position where the AC servomotor 21 has the adjusted angle α. By switching from rolling to reversing, the center (end point ME) of the connecting member 22a becomes the minimum distance from the inspection object 3, and the tip of the marking means 23a can be brought into contact with the inspection object 3.

  That is, in the marking device 90 described with reference to FIG. 4, the tip of the marking unit 93 a is set to contact the inspection object 3 at the bottom dead center BDC of the connecting member 92 a. Therefore, when the tip of the marking means 93a is worn away and the tip of the marking means 93a does not come into contact with the object 3 to be inspected, the connection between the connecting member 93c and the holding member 93b is loosened or tightened. It has been necessary to adjust the tip of the marking means 93a to abut the inspection object 3 at the bottom dead center BDC of the connecting member 92a by shifting the means 93a downward with respect to the holding member 93b.

  On the other hand, in the marking device 20 according to the present embodiment, the worker who is in the control chamber 2a even when the tip of the marking means 23a does not contact the inspection object 3 at the end point ME of the connecting member 22a. Resets the distance Dα to the input device 24, and the control unit 25 resets the angle α in accordance with the distance Dα, so that the tip of the marking means 23a can be adjusted so as to contact the inspection object 3. it can.

In the above-described example, the distance Dα and the angle α are based on the case where the connecting member 22a of the drive cam disk 22 is on the straight line L1, that is, when the AC servomotor 21 is rotated in the range of the angle α. However, the present invention is not limited to this example.
FIG. 2C is a diagram showing an initial point of the rotating shaft 21 a of the AC servomotor 21. In FIG. 2C, a straight line L2a passes through the center of the rotating shaft 21a, is in the diameter direction of the drive cam disk 22, and is clockwise with respect to the straight line L1 at an angle β (0 ° <β ≦ 270 ° −α ) Is a straight line.
As shown in FIG. 2C, the rotational motion of the AC servomotor 21 may be started from the position where the center (starting point) of the connecting member 22a of the drive cam disk 22 is located on the straight line L2a. In this case, the relationship between the distance Dβ and the angle (α + β) is approximately expressed by the following equation (2).
Distance Dβ = radius R22 × sin (2π × angle α / 360)
+ Radius R22 × sin (2π × angle β / 360) (2)

  For example, if the angle α = the angle β, the distance Dβ is twice the distance Dα described above. When an operator in the control room 2a inputs the distance Dβ to the input device 24 shown in FIG. 1, the control unit 25 calculates the angle α and the angle β based on the equation (2), and the angle α and the angle β Then, the AC servo motor 21 is driven. As a result, the AC servomotor 21 switches the rotational movement of the rotating shaft 21a from normal rotation to reverse at a position where the angle formed by the straight line L2a and the straight line L1 is the angle α, so that the end point ME of the connecting member 22a is inspected. The minimum distance from the object 3 may be set so that the tip of the marking means 23a is in contact with the inspection object 3.

FIG. 3 is a schematic configuration diagram of the input device 24 that inputs the distance Dα or the distance Dβ described above. Hereinafter, in the case of inputting the distance Dα, that is, an operator in the control room 2a inputs the distance Dα at the position shown in FIG. 2B to the input device 24, and the control unit 25 performs AC servo according to the angle α. A case where the motor 21 is driven will be described.
The input device 24 is an operation button 25a for increasing the distance Dα input by the operator in the control room 2a to the + side, an operation button 25b for decreasing the distance Dα to the − side, and a direct value for the distance Dα. As an input field 26 and a display unit 27 with a scale for displaying Dα actually input.

The operation button 25a and the operation button 25b are an increment button and a decrement button, respectively, and each time the operator presses the button, the distance Dα can be increased or decreased by a predetermined length (for example, 10 μm unit). .
The input field 26 is an input unit that can input the distance Dα in m units up to the second decimal place. For example, the input field 26 is an input unit that can input the distance Dα in a predetermined length (for example, in units of 10 μm).
The display unit 27 displays the distance Dα set between the minimum value MIN and the maximum value MAX. For example, when the radius R22 shown in FIG. 2A is 16 mm, the maximum scale value MAX is 16 mm and the minimum scale value MIN is 0 mm.

(Method for adjusting the end point ME)
Next, in the defect inspection system 1 described above, the center (end point ME) of the connecting member 22a when the marking on the inspection object 3 cannot be optimally marked due to wear or the like of the tip of the marking means 23a. ) Will be described.
First, as in the example described with reference to FIG. 2, the distance Dα is Dα = 6.78 mm when the inspection line is in operation as shown in FIG. 2B, and a straight line as shown in FIG. The case where the angle α formed by L1 and the straight line L2 is initially set to an angle α = 25 ° will be described.

In the control room 2a, the operator directly inputs, for example, 6.80 as the distance Dα into the input field 26 of the input device 24 using a touch panel, a keyboard, or the like. At this time, the display unit 27 of the input device 24 displays the distance Dα on a scale corresponding to the position of 6.8 mm.
The control unit 25 outputs a rotation angle setting signal AS corresponding to the input distance Dα (= 6.80 mm) to the AC servomotor 21. When the AC servomotor 21 receives the marking start signal Start from the image processing device 13, the position where the straight line L2 and the straight line L1 passing through the center of the connecting member 22a overlap with each other in accordance with the rotation angle setting signal AS (FIG. 2B). ))) To start counterclockwise rotation. When the angle between the straight line L2 and the straight line L1 reaches an angle α (= 25.15 °), the AC servo motor 21 rotates clockwise to the position where the straight line L2 and the straight line L1 overlap, and the next rotation angle The input of the setting signal AS and the marking start signal Start is awaited.

When the angle between the straight line L2 and the straight line L1 becomes the angle α, the tip of the marking means 23a is located at the lowest point on the straight line L0, and the inspection object 3 is marked.
An operator looks at the markings applied to the inspection object 3 flowing through the inspection line of the clean room 2b from the control room 2a. When the operator determines that the marking is larger than the expected size and the ink is excessively smeared, the tip of the marking means 23a is crushed by the inspection object 3 with the distance Dα = 6.80 mm. Therefore, the operation button 25b of the input device 24 is pressed, and the distance Dα is adjusted to a value smaller than 6.80 mm in units of 10 μm. The control unit 25 calculates the angle α from the distance Dα input by the equation (1), and outputs a rotation angle setting signal AS corresponding to the calculated angle α to the AC servomotor 21. The AC servomotor 21 changes the angle α to an angle about 0.04 ° smaller every time the set value of the distance Dα changes by 10 μm in accordance with the rotation angle setting signal AS.

  For example, when the operator inputs the distance Dα = 6.77 mm to the input device 24, the control unit 25 calculates the angle α as 25.03 ° from the equation (1), and according to the angle α = 25.03 °. The rotation angle setting signal AS is output to the AC servomotor 21. When the angle between the straight line L2 and the straight line L1 becomes an angle α (= 25.03 °), the AC servo motor 21 rotates clockwise until the position where the straight line L2 and the straight line L1 overlap, and the next rotation angle The input of the setting signal AS and the marking start signal Start is awaited.

  An operator looks at the markings applied to the inspection object 3 flowing through the inspection line of the clean room 2b from the control room 2a. If the operator determines that the visual marking is now smaller in size than the expected size and is too dark to be visually confirmed, the operator must continue to operate the inspection line as is. Since the marking is not the optimum marking, the operation button 25a of the input device 24 is pressed, and the distance Dα is adjusted to be larger than 6.77 mm in units of 10 μm.

For example, the worker inputs the distance Dα = 6.78 mm to the input device 24.
Thereby, the marking device 20 applies the marking to the defect portion of the inspection object 3 according to the distance Dα = 6.78 mm every time the marking start signal Start is input from the image processing device 13. When the operator visually observes the marking state from the control room 2a and determines that there is no problem in the marking state, the worker keeps the set value of the distance Dα as it is.

However, as the defect inspection of the inspection object 3 proceeds, the tip of the marking means 23a wears out, so that the marking applied by the marking device 20 is not the optimum marking set initially, the marking size is small, In order to visually confirm, there are cases where the marking is thin.
When the marking is not optimum, the operator can set the marking applied by the marking device 20 to the optimum marking without entering the clean room 2b by operating the input device 24 in the control room 2a.

As described above, the defect inspection system (defect inspection system 1) according to the present invention detects a defective portion existing on the moving inspection object part (inspection object 3) and outputs a marking start signal (marking start signal Start). The defect inspection system includes a defect detection apparatus (defect inspection apparatus 10) that performs the marking and a marking apparatus (marking apparatus 20) that performs marking on the detected defective portion when a marking start signal Start is input.
Here, the marking device 20 is connected to an AC servo motor (AC servo motor 21) that starts rotating the rotating shaft when a marking start signal Start is input, and a rotating shaft (rotating shaft 21a) of the AC servo motor 21. And a driving cam disk (driving cam disk 22) that rotates around the rotating shaft 21a and a marking means (marking means 23a) for marking one end, and the other end is connected to the outer periphery of the driving cam disk 22 A drive link (drive link 23) which is connected via the member 22a, converts the rotational movement of the drive cam disk 22 into vertical movement in the direction perpendicular to the inspection object 3, and abuts the marking means 23a on the inspection object 3. And comprising.
In addition, the bottom death is an intersection of a circle (circle C22) having a radius (radius R22) from the rotation shaft 21a to the connecting member 22a and a straight line (straight line L0) descending vertically from the rotation shaft 21a to the inspection object 3. The rotation operation is controlled so that a point other than the point (bottom dead center BDC) becomes the end point (end point ME) of the rotation operation of the connecting member 22a.

  According to the present invention, the rotational operation of the drive cam disk 22 is controlled so that the end point ME at the center of the connecting member 22a that fixes the drive cam disk 22 to the AC servomotor 21 is a point other than the bottom dead center BDC. . The position of the connecting member 22a at the end point ME corresponds to the tip of the marking means 23a included in the drive link 23 coming into contact with the inspection object 3. As a result, the end point ME at the center of the connecting member 22a is set in advance from the input device 24 provided in the control chamber 2a. By setting, the tip of the marking means 23 a included in the drive link 23 can be brought into contact with the inspection object 3.

  That is, a defect inspection system that eliminates the need for manual adjustment of the position of the marking means 23a in the holding member 23b and can continuously perform optimum marking without changing the holding position of the marking means 23a by the holding member 23b. 1 can be provided. Further, by setting the end point ME at the center of the connecting member 22a from the input device 24 provided in the control chamber 2a, the adjustment work can be performed without stopping the inspection process.

  As described above, the embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to the above, and various design changes and the like can be made without departing from the scope of the present invention. It is possible to For example, when a plurality of defects are detected in the width direction, a plurality of marking devices 20 may be arranged in the width direction of the inspection object 3, and a plurality of marks parallel to each other may be marked on the inspection object 3.

  In the above embodiment, the driving range in which the marking unit 23a reciprocates is input from the input device 24 as the distance Dα or as a value for increasing or decreasing the distance Dα, and the control unit 25 receives the input distance Dα. The configuration is shown in which the angle α is calculated by the equation (1), and the rotation angle setting signal AS is output according to the calculated angle α. However, this is merely an example, and for example, the control unit 25 may have a table that stores a distance Dα that can be referred to by an identification signal input from the input device 24. In the case of adopting this configuration, the input device 24 outputs a predetermined identification signal to the control unit 25, for example, when an operator presses a dedicated operation button from the input device 24. The control unit 25 reads the distance Dα corresponding to the input identification signal from the table, calculates the angle α according to the equation (1), outputs the rotation angle setting signal AS corresponding to the angle α, and outputs the rotation angle setting signal AS of the AC servo motor 21. Forward rotation and reversal control of the rotational motion may be performed. Further, in this table for storing the distance Dα, each identification signal is stored in association with the angle α, and when the identification signal is input from the input device 24, the control unit 25 corresponds to this identification signal. The angle α may be read and the rotation angle setting signal AS corresponding to the angle α may be output.

  DESCRIPTION OF SYMBOLS 1 ... Defect inspection system, 2a ... Control room, 2b ... Clean room, 3 ... Inspection object, 4 ... Supply roll, 5a, 5b ... Conveyance roll, 6 ... Take-up roll, 10 ... Defect inspection apparatus, 11 ... Illumination device, DESCRIPTION OF SYMBOLS 12 ... Line sensor, 13 ... Image processing device, 20, 90 ... Marking device, 21, 91 ... AC servo motor, 21a, 91a ... Rotating shaft, 22, 92 ... Drive cam disk, 22a, 23c, 92a, 93c ... Connection Members 23, 93 ... drive link, 23a, 93a ... marking means, 23b, 93b ... holding member, 24 ... input device, 25a, 25b ... operation buttons, 26 ... input field, 27 ... display section, Start ... marking start signal , AS ... rotation angle setting signal, D ... distance, ME ... end point, BDC ... bottom dead center, 28 ... straight guide, 28a ... straight guide rail, 28b ... slide Block

Claims (4)

A defect inspection system for detecting and marking a defective portion present in a moving inspection object,
A motor provided with a cam on a rotating shaft;
One end is connected to the cam, the other end is provided with marking means, and the drive link is marked by the marking means by reciprocating according to the rotation of the cam;
An input unit for inputting a set value for determining a driving range;
In accordance with the set value input from the input unit, a control unit that reciprocates the marking means by rotating the motor forward and backward, and
A defect inspection system comprising: The input unit inputs a set value that specifies a range in which the marking means reciprocates,
The control unit rotates the motor forward and backward according to a range of a rotation angle corresponding to the reciprocating range.
The defect inspection system according to claim 1. The input unit is installed in a place other than the work room provided with the marking means.
The defect inspection system according to any one of claims 1 and 2. A motor provided with a cam on a rotating shaft, a driving link for marking by the marking means by reciprocating according to the rotation of the cam, one end being connected to the cam and the other end being provided with marking means; In a defect inspection system comprising: a method for detecting and marking a defective portion present in a moving inspection object,
An input step for inputting a set value for determining a driving range to the input unit;
A motor switching step for causing the motor to perform normal rotation and reverse rotation according to the set value input from the input unit;
A marking method comprising:

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