JP2004077425A - Inspecting apparatus for drive transmission belt - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inspecting apparatus for a drive transmission belt that can speedily and accurately inspect an abrasion scar, a machining scar, a striking scar, or the like that exists on a belt end face. <P>SOLUTION: A plurality of rotation tables for setting a drive transmission belt are provided on a trestle table 1. A first end face inspecting apparatus for optically inspecting the end face of the drive transmission belt by a camera, the front-and-back reversing apparatus of the belt; a second end face inspecting apparatus for inspecting the other end face of the belt, and a marking apparatus for tracking and marking the position of a detected scar are disposed on the outer periphery of the rotation table 1. The rotation table on the trestle table can be erected, and the both end faces of the drive transmission belt are simultaneously inspected by two cameras. A marked drive transmission belt is subjected to a secondary inspection. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a drive transmission belt inspection device for automatically detecting a defect generated on a belt end surface in a drive transmission belt manufacturing process such as a CVT belt.
[0002]
[Prior art]
A CVT belt incorporated in a continuously variable transmission of an automobile or the like is formed by laminating about ten metal belts. These metal belts are laminated after being polished in advance by barrel polishing.However, if wear flaws, processing flaws, dent flaws, and flaws occur on the belt end face, the belt breaks from the flaw as a starting point during use. Can lead to
[0003]
Conventionally, a single-phase CVT belt or a laminated CVT belt is placed on a rotary table and rotated at a low speed, while the end face of the belt is photographed with a magnifying glass, and the inspector inspects the image while viewing the image displayed on the monitor. I was doing. When the inspector finds a flaw, the rotary table is stopped and marking is performed on the corresponding portion. After the inspection of one side is completed, the belt is turned over and the opposite side is similarly inspected. When the inspection of both end surfaces is completed, a secondary inspection is performed on the marked portion by using a stereoscopic microscope, taking into account the depth information of the flaw, and the quality is determined.
[0004]
However, this conventional method has a problem that the inspector visually observes the image displayed on the monitor, cannot increase the rotation speed of the rotary table, and takes a long time to inspect one belt. . Further, when inspecting the CVT belt after the lamination, foreign substances such as dust entering between the belts in the laminating step may be erroneously detected as flaws, thereby lowering the inspection accuracy.
[0005]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION The present invention has been made to solve the conventional problems described above, and to provide a drive transmission belt inspection apparatus capable of accurately inspecting a wear flaw, a processing flaw, a dent flaw, and the like existing on a belt end face at a high speed. It was done.
[0006]
[Means for Solving the Problems]
The drive transmission belt inspection apparatus according to the first aspect of the present invention, which has been made to solve the above-described problem, includes a plurality of rotary tables, and is provided around a gantry table that is driven in a predetermined direction at predetermined time intervals. A first end face inspection device for optically inspecting an end face of a drive transmission belt set on an outer periphery by a camera, a device for inverting a belt set on a rotary table, and a drive transmission belt set on a rotary table A second end surface inspection device for optically inspecting the other end surface of the device with a camera, and a marking device for tracking the position of the detected flaw and marking the drive transmission belt.
[0007]
According to a second aspect of the present invention, there is provided a drive transmission belt inspection device, wherein a plurality of rotary tables capable of taking a horizontal posture and an upright posture are installed on a gantry table driven in a fixed direction at regular time intervals. An end face inspection device that optically inspects both end surfaces of the drive transmission belt set on the outer periphery of the upright rotary table with two cameras, and a drive transmission belt that tracks the position of the detected flaw and And a marking device for marking. In any of the inventions, it is preferable to include a secondary inspection means for strictly inspecting the marked drive transmission belt for defects by measuring the profile in the belt thickness direction.
[0008]
As shown in the embodiments described below, according to the drive transmission belt inspection device of the present invention, the end face flaw of the single-phase drive transmission belt can be automatically inspected at high speed and with high accuracy. In the embodiments described below, the drive transmission belt is a CVT belt. However, the present invention relates to a belt for driving precision equipment such as a printing machine, a copying machine, a robot, and an OA printer, and a precision component conveyance such as a semiconductor part and an electronic / electric part. Belts for high-temperature parts such as drying ovens and heating furnaces, conveyor belts for high-temperature parts such as fired parts, conveyor belts for sanitary goods such as food, chemicals and pharmaceuticals, and belts for precision inspection and conveyance. The present invention can be applied to inspection of various drive transmission belts.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described.
1 and 2 show an embodiment of the invention according to claim 1, wherein 1 is a gantry table which is intermittently driven in a fixed direction at regular intervals, and 2 is a plurality of gantry tables arranged on the gantry table 1. It is a rotary table. In this embodiment, five rotary tables 2 are arranged on the gantry table 1, and the gantry table 1 is rotated by 72 ° every 3 to 10 seconds. Each rotary table 2 can be rotated around a vertical axis by a motor 3 on the back of the gantry table 1. Each rotary table 2 is sized so that a single-layer CVT belt (drive transmission belt) before lamination can be set on its outer periphery.
[0010]
As shown in FIG. 1, around the gantry table 1, an entrance conveyor 10, a loading robot 20, a belt height detecting device 21, a first end face inspection device 30, a reversing device 40, and a second end face inspection device 50, a marking device 60, a take-out robot 70, and exit conveyors 80 and 81 are arranged.
[0011]
The entrance conveyor 10 conveys a single-layer CVT belt to be inspected from a previous process, and is provided at its end with positioning guides 11 and 12 for stopping the CVT belt at a predetermined position. The loading robot 20 has a function of chucking the CVT belt positioned by the positioning guides 11 and 12 and setting it on the outer periphery of the rotary table 2. At this time, since the processing error of the CVT belt itself and the mounting error to the rotary table 2 occur, the height of the upper end surface of the CVT belt is detected by the belt height detecting device 21.
[0012]
The first end face inspection device 30 has a lighting device 32 and a camera 33 attached to the tip of an arm 31 that can move up and down and traverse as shown in FIG. The illuminating device 32 guides a light beam emitted from a high-intensity light source such as a halogen lamp or a metal halide lamp to a convex lens at the tip by an optical fiber cable, and condenses it on the upper end surface of the CVT belt to be inspected, for example, about several hundred thousand lux. High illuminance. In addition, as shown in FIG. 3, it is preferable that the illuminating device 32 and the camera 33 are arranged so that the specularly reflected light on the belt surface is received by the camera 33. The angle α shown in FIG. Preferably, it is around 10 °.
[0013]
The camera 33 has a two-dimensional CCD element or a one-dimensional line sensor element as an image sensor, and photographs the upper end surface of the CVT belt. The camera 33 is provided with a magnifying glass so that the resolution is 1 to 50 μm in the belt thickness direction and the belt longitudinal direction. In this embodiment, the lens magnification is set so that the resolution in the belt thickness direction is 3 μm, and while the rotary table 2 is stopped, the resolution in the belt longitudinal direction is also 3 μm.
[0014]
However, the resolution in the longitudinal direction of the belt decreases due to the rotation of the rotary table 2. In order to prevent this reduction, the rotation speed may be reduced more than the cycle time determined by the scanning frequency of the image sensor, but the inspection time becomes longer. Therefore, in order to shorten the inspection time without deteriorating the image of the flaw to be inspected, the resolution in the belt longitudinal direction was set to 10 μm here. In addition, using a 1024-bit line sensor element, the scanning frequency was set to 40 MHz, and the entire circumference of the CVT belt could be inspected in about 1 to 5 seconds.
[0015]
In order to prevent the CVT belt under inspection from separating from the rotary table 2 due to centrifugal force, a pressing roller 34 is provided immediately below the first end surface inspection device 30.
[0016]
The first end surface inspection device 30 optically inspects the upper end surface of the CVT belt. This inspection is performed by utilizing a change in an image captured by the cross-sectional profile of the CVT belt. For example, a normal belt has an image as shown in FIG. 4, while a flawed belt has an image as shown in FIG. 5.
[0017]
After the inspection by the first end face inspection device 30 is completed, the CVT belt is once removed from the turntable 2 by the reversing device 40, and is mounted on the turntable 2 again after reversing the front and back. As shown in FIG. 2, the reversing device 40 has a pair of fingers 42 rotatable in the vertical direction attached to the lower end of a portal arm 41. The finger 42 has an arc shape as shown in FIG. 1, and is synchronously rotated by a motor 43. The portal arm 41 is supported by an arm 44 which can be moved up and down and traverse.
[0018]
The second end surface inspection device 50 inspects the upper end surface of the inverted CVT belt, and has the same configuration as the first end surface inspection device 30.
[0019]
The marking device 60 is a device that, when a flaw is detected by the first end surface inspection device 30 or the second end surface inspection device 50, marks the position of the detected flaw to mark the CVT belt. The marking is performed by the ink jet printer 61. The marked CVT belt is secondarily inspected as described below.
[0020]
The take-out robot 70 is a device for removing the CVT belt from the rotary table 2 and taking it out to the outlet conveyor 80 or 81. The CVT belt whose flaw is detected and marked by the first end face inspection device 30 or the second end face inspection device 50 is taken out by the exit conveyor 80 and conveyed to the reject box 82. Further, the CVT belt in which no flaw is detected is sent to a laminating apparatus at a subsequent stage to produce a laminated CVT belt.
[0021]
FIG. 6 shows the secondary inspection means 90 of the marked CVT belt. The secondary inspection means 90 includes a turntable 91, a marking detection device 92, and a one-dimensional displacement meter 93. The marked CVT belt is set on the outer periphery of the rotary table 91 by the robot 94, and the marking detection device 92 optically detects the marking position, that is, the position of the flaw. Then, the rotary table 91 is stopped at a position where the position of the flaw is immediately below the one-dimensional displacement meter 93.
[0022]
The one-dimensional displacement meter 93 scans the position where the flaw of the CVT belt is detected in the width direction and precisely measures the height displacement of the belt end surface to obtain a profile. FIG. 7 is an explanatory view of this, in which a normal profile is stored, and the measured end face start point and end face end point are compared together. Then, for each position, the square of the difference between the two is integrated, and a certain value is determined, or a flaw is determined when the absolute value of the difference between the two exceeds a certain value. As a result, those determined to be flaws are transported by the robot 95 to the defective belt box 96, and those within the allowable range are transported to the normal belt box 97.
[0023]
The secondary inspection means 90 is not an essential requirement of the present invention, and an inspector can perform a secondary inspection of the marked CVT belt as in the conventional case.
[0024]
According to the drive transmission belt inspection apparatus of the first aspect of the present invention described above, wear flaws, processing flaws, dent flaws, and the like existing on both end faces of the drive transmission belt can be automatically inspected at a high speed.
[0025]
8 to 10 show an embodiment of the second aspect of the present invention. Reference numeral 100 denotes a gantry table that is driven in a fixed direction at regular intervals. On the gantry table 100, an arm 102 that can swing between a horizontal position and a vertical position around a horizontal axis 101 is provided. In this embodiment, three arms 102 are arranged at 120 ° intervals, and each arm 102 is driven by a geared motor 103.
[0026]
At the end of each arm 102, a rotary table 104 for setting a CVT belt (drive transmission belt) is provided. As shown in FIG. 10, the belt holder 105 at the center of the turntable 104 is divided into, for example, eight sections, and can be enlarged and reduced by an air cylinder. Therefore, if the CVT belt is set on the turntable 104 and the belt holder 105 is enlarged, the CVT belt can be held in tension.
[0027]
As shown in FIG. 8, at the supply position, the arm 102 and the rotary table 104 take a horizontal posture, and the CVT belt is set on the rotary table 104 by the robot 107 from the entrance conveyor 106. Then, tension is applied to the CVT belt. In this state, the height of the CVT belt is measured as described above.
[0028]
At the next inspection position where the gantry table 100 is rotated by 120 °, the arm 102 and the rotary table 104 take the vertical posture shown in FIG. 9, and the rotary table 104 is rotated in a vertical plane. As shown in FIGS. 8 and 9, end face inspection devices 108 and 109 for optically inspecting both end faces of the CVT belt with two cameras are provided at the inspection position. Each of the end face inspection devices 108 and 109 is a combination of a lighting device and a camera as described above. The end surface inspection device 109 includes a focus slide mechanism, and automatically adjusts the position from the belt end surface to be inspected according to the previously measured height of the CVT belt. According to the second aspect of the present invention, since the rotary table 104 is set upright, both end faces of the CVT belt can be inspected simultaneously.
[0029]
Further, at a position where the gantry table 100 is rotated by 120 °, a marking device 110 for tracking the position of the detected flaw and marking the CVT belt is provided. This device is similar to that described above. However, marking is performed with the rotary table 104 upright. Thereafter, the rotary table 104 is returned to the horizontal position, the robot 111 removes the CVT belt from the rotary table 104, and the marked CVT belt is taken out to the exit conveyor 112, and the CVT belt in which no flaw is detected is taken out to the exit conveyor 113. The secondary inspection is performed on the marked CVT belt as described above.
[0030]
In this manner, the inspection device for the drive transmission belt according to the second aspect of the present invention can also accurately inspect wear flaws, processing flaws, dent flaws and the like existing on the belt end face at a high speed.
[0031]
【The invention's effect】
As described above, according to the drive transmission belt inspection apparatus of the present invention, the drive transmission belt, which has conventionally required a long time, is inspected at a high speed, and the wear flaws and processing flaws existing on the belt end face. And dent flaws can be accurately detected.
[Brief description of the drawings]
FIG. 1 is a plan view showing an embodiment of the present invention.
FIG. 2 is a front view showing the embodiment of the first invention.
FIG. 3 is an explanatory diagram showing a relationship between a lighting device and a camera.
FIG. 4 is an image of a normal belt and its cross-sectional profile.
FIG. 5 is an image of a belt having a processing flaw and a cross-sectional profile thereof.
FIG. 6 is a plan view of a secondary inspection unit.
FIG. 7 is a graph of a cross-sectional profile for explaining the content of a secondary inspection.
FIG. 8 is a plan view showing an embodiment of the invention of claim 2;
9A and 9B are diagrams showing an inspection position according to the second aspect of the present invention, wherein FIG. 9A is a front view of a main part, and FIG. 9B is a right side view.
FIG. 10 is an explanatory diagram of an enlargement / reduction mechanism of a rotary table.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 gantry table 2 rotary table 3 motor 10 entrance conveyor 11 positioning guide 12 positioning guide 20 loading robot 21 belt height detection device 30 first end face inspection device 31 arm 32 lighting device 33 camera 34 holding roller 40 reversing device 41 portal type Arm 42 Finger 43 Motor 44 Arm 50 Second end face inspection device 60 Marking device 61 Ink jet printer 70 Removal robot 80 Outlet conveyor 81 Outlet conveyor 82 Reject box 90 Secondary inspection means 91 Rotary table 92 Marking detection device 93 One-dimensional displacement meter 94 Robot 96 Defective belt box 97 Normal belt box 100 Mounting table 101 Horizontal axis 102 Arm 103 Geared motor 104 Rotary table 105 Belt holder 106 Inlet conveyor 107 Robot 108 End Inspection apparatus 109 end-side inspection device 110 the marking device 111 robot 112 exit conveyor 113 exit conveyor

Claims (3)

A first end face inspection apparatus that includes a plurality of turntables and optically inspects, using a camera, an end face of a drive transmission belt set on an outer periphery of the turntable around a gantry table that is driven in a fixed direction at regular intervals. A device for reversing the front and back of the belt set on the rotary table, a second end surface inspection device for optically inspecting the other end surface of the drive transmission belt set on the rotary table with a camera, An apparatus for inspecting a drive transmission belt, comprising a marking device for tracking a position and marking the drive transmission belt. A plurality of rotary tables that can take a horizontal posture and an upright posture are installed on a gantry table that is driven in a fixed direction at regular intervals, and set around the gantry table around the gantry table. An end face inspection device for optically inspecting both end surfaces of the drive transmission belt with two cameras, and a marking device for tracking a position of a detected flaw and marking the drive transmission belt, the drive transmission being characterized in that: Belt inspection device. 3. The drive transmission belt inspection apparatus according to claim 1, further comprising a secondary inspection unit configured to strictly inspect the marked drive transmission belt for defects by measuring a profile in a belt thickness direction.

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