TWI655420B - Visual inspection apparatus - Google Patents

Abstract

The present invention relates to a visual inspection device. The visual inspection device is provided on the downstream side of the automatic inspection device, and performs visual inspection on the inspection object, and includes an extraction conveyance unit and a visual inspection unit, and the extraction conveyance unit includes a normal inspection object transport unit. And the object to be inspected. In the normal inspection object transport unit, the normal inspection object is transported, and the object to be inspected transports the object to be inspected. When it is detected by the sensor that the object to be inspected is transported, the object to be inspected is transported to the object to be inspected by the control device. After the object to be inspected is transported to the object to be inspected, the extraction and transport unit is controlled by the control device to return to the position where the normal inspection object can be transported. On the other hand, the object to be inspected is transported to the visual inspection unit, and the visual inspection unit visually inspects the object to be inspected that has been transported by visual inspection. According to the visual inspection device, after the automatic inspection, the object to be inspected can be taken out and transported to the visual inspection unit by a simple structure. It can reduce costs and increase production efficiency.

Description

Visual inspection device

The present invention relates to a visual inspection device, and more particularly to a visual inspection device used in a manufacturing system of an optical display device.

Nowadays, due to the popularity of optical display devices, the demand for optical display devices is rapidly increasing. Therefore, there is a need for a manufacturing system of an optical display device (display panel) capable of manufacturing an optical display device with high quality and high efficiency.

In a production line of an optical display device such as a liquid crystal display device, an optical film taken up in a roll shape is fed and cut into individual sheets, and the cut thin film of the optical film is attached to the glass substrate. The Roll to Panel (RTP) method is well known, and such a manufacturing device is called an RTP attachment device.

In the RTP-type optical display device manufacturing system, an automatic inspection device is generally provided on the downstream side of the optical film attachment device, and the quality of the product is inspected.

In the optical film attaching device, an automatic inspection device for a glass substrate to which an optical film is attached, for example, an automatic inspection device for an optical display device production line, is an automatic display device for an optical display device to which an optical film is attached. Perform defect inspection. After the defect inspection, the optical display device determined to be normal is transported to the downstream device side.

Nowadays, in order to improve productivity, the normal and poor judgment of the above optical display device is very important. However, depending on the accuracy of the automatic inspection device, when the accuracy is low, the defective optical display device is omitted, and if the accuracy is too high, the normal optical display device is misjudged as poor optical. The display device is the same.

Therefore, it is considered that a visual inspection device is further provided after the automatic inspection device for performing automatic defect inspection on the attached optical display device. In other words, as a visual inspection device, a technique for allowing the user to reconfirm the accuracy of the determination result of the automatic inspection device by visual inspection is known (for example, refer to Patent Document 1).

Further, in the prior art, Patent Document 2 discloses a structure in which an object to be inspected is conveyed in a direction different from the feeding direction of the production line for inspection. In the case of the specific description, Patent Document 2 describes a mechanism for moving the object 2 to be inspected from the conveyance belt which is advanced in the conveyance direction of the production line toward the conveyance direction with respect to the production line. The ball is screwed in a wide direction in a direction perpendicular to the vertical direction. However, such a mechanism is not suitable for use in a transport apparatus of an optical display device because it causes damage to an optical display device.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2009-031141

[Patent Document 2] Japanese Patent Laid-Open No. Hei 6-064742

In the visual inspection device of the prior art, in order to perform visual inspection, it is necessary to take out the optical display device (inspection object) to be inspected from the production line, and it takes a lot of time and labor for this. There is a lot of room for improvement.

The present invention has an object of providing a visual inspection device capable of extracting an object to be inspected and transporting it to a visual inspection unit after the automatic inspection, and reducing the cost and improving the production efficiency with a simple structure.

The visual inspection device 1 according to one aspect of the present invention is provided on the downstream side of the automatic inspection device and visually inspects the object 2 to be inspected. This visual inspection device is provided with an extraction conveyance unit 10 and a visual inspection unit 20. The sifting and transporting unit 10 is a normal inspection object transport unit 10a that transports a normal inspection object that is determined to be normal at the automatic inspection device, and the object to be inspected The delivery unit 10b is configured as two upper and lower sections. In the normal inspection object transport unit 10a, the object to be inspected 2b is transported, and the object to be inspected 10b is the object 2b to be inspected for visual inspection. When it is detected by the sensor that the object to be inspected 2b is transported, the extraction and transport unit 10 is operated by the control device, and the object to be inspected 2b is transported to the object to be inspected. The object transporting unit 10b is moved up and down, and after the object to be inspected 2b is transported to the object to be inspected 10b, the extracting and transporting unit 10 is controlled by the control device. The object to be inspected 2b is moved to the position of the normal inspection object 2a, and the object to be inspected 2b moved to the object to be inspected 10b is transported to the visual inspection unit 20, and the visual inspection unit 20 is placed at the visual inspection unit 20, The operator visually inspects the object 2b to be inspected that has been transported by visual inspection.

According to the visual inspection device, after the automatic inspection, the object to be inspected can be taken out and transported to the visual inspection unit by a simple structure. By this, it is possible to reduce costs and increase production efficiency.

In the visual inspection device according to another aspect of the present invention, the normal inspection object transport unit 10a is positioned above the object transport unit 10b, and when the normal inspection object 2a is being transported, the normal inspection is performed. The object transport unit 10a is located at a position coplanar with the main transport unit, and the object transport unit 10b is positioned below the main transport unit and is detected by the sensor. Correct When the object 2b is transported, the pick-and-place transport unit 10 is moved upward toward the position where the object-to-be-transported unit 10b is coplanar with the main transport unit by the control of the control device, and the object to be inspected is moved. 2b is conveyed to the object-to-be-conveyed object conveying part 10b, and after the to-be-inspected object 2b is conveyed to the to-be-inspected object conveying part 10b, this extraction conveyance unit 10 is controlled by the control apparatus. When the control object is moved downward, the normal inspection object transport unit 10a is returned to the position where the normal inspection object 2a is coplanar with the main transport unit, and the object to be inspected on the object transport unit 10b is inspected. 2b is transported to the visual inspection unit 20.

In the visual inspection device according to still another aspect of the present invention, the normal inspection object transport unit 10a is positioned below the object transport unit 10b, and when the normal inspection object 2a is transported, the normal inspection object is The object transport unit 10a is located at a position coplanar with the main transport unit, and the object to be inspected 10b is positioned above the main transport unit, and the object to be inspected 2b is detected by the sensor. In the case of the control unit, the transport unit 10 is moved downward toward the position where the object transport unit 10b is coplanar with the main transport unit, and the object to be inspected 2b is The object to be inspected is transported to the object to be inspected 10b, and after the object to be inspected 2b is transported to the object to be inspected 10b, the pumping and transporting unit 10 is moved upward by the control of the control device. And returning to the position where the normal inspection object conveying unit 10a is coplanar with the main conveyance unit and capable of transporting the normal inspection object 2a, and the inspection is performed. The object 2b to be inspected on the object transport unit 10b is transported to the visual inspection unit 20.

The visual inspection device according to still another aspect of the present invention further includes an adsorption device 301, and when the object 2b to be inspected on the object to be inspected 10b is transported to the visual inspection unit 20, The object to be inspected 2b on the object to be inspected 10b is transported to the visual inspection unit 20 by the adsorption device 301.

According to the above configuration of the present invention, since the object to be inspected 2b is transported by the adsorption device 301, it can be transported to the visual inspection unit 20 without causing damage to the object to be inspected.

According to still another aspect of the present invention, the visual inspection unit 20 is provided with a visual inspection table that is horizontal when the object to be inspected 2b is transported, and is capable of horizontally being inspected. Move to the tilt state.

According to the above configuration of the present invention, it is possible to prevent the optical display device from being stained and damaged by visual inspection without touching the object to be inspected by hand.

1‧‧‧ visual inspection device

2‧‧‧Inspection object (optical display device)

2a‧‧‧Normal inspection object (normal optical display device)

2b‧‧‧Objects to be inspected (bad optical display device)

3‧‧‧Optical film attachment device

4‧‧‧Automatic inspection device

10‧‧‧Drawing transport unit

10a‧‧‧Normal inspection object transport unit (normal optical display device transport unit)

10b‧‧‧Inspected object transport unit (bad optical display unit transport unit)

20‧‧‧ visual inspection unit

21‧‧‧Optical display device holding unit

22‧‧‧Backlight unit

301‧‧‧Adsorption device

50‧‧‧Double direction conveyor

501‧‧‧Main transport direction transport device

502‧‧‧Vertical conveying device

Fig. 1 is a plan view schematically showing a configuration in which only an automatic inspection device is provided in a manufacturing system of an optical display device by the prior art.

FIG. 2 is a plan view schematically showing a configuration in which a visual inspection device is further provided in addition to the automatic inspection device in the manufacturing system of the optical display device according to the present invention.

Fig. 3 is a schematic view showing the configuration of a visual inspection device according to the present invention, wherein (a) is a top view and (b) is a side view.

FIG. 4 is a side view schematically showing the conveyance state of the optical display device in the visual inspection device according to one embodiment of the present invention, and (a) is a normal inspection object being transported. (b) is a state in which the object to be inspected is transported to the object transporting portion, and (c) is a transporting unit after the object to be inspected is transported to the object transporting portion. Go back to the original position.

FIG. 5 is a view schematically showing a state in which the optical display device is transported by the main transport direction transport device.

FIG. 6 is a view schematically showing a state in which the optical display device is transported by the vertical transport device.

Fig. 7 is a side view showing a visual inspection unit in the visual inspection device of the present invention, wherein (a) is a diagram showing a receiving position of an object to be inspected, and (b) is a diagram. A diagram showing a schematic display of the visual inspection position.

Fig. 8 is a flow chart showing the operation of the visual inspection device according to one embodiment of the present invention.

[Fig. 9] is a display of a visual inspection device according to another embodiment of the present invention, and (a) is a normal inspection object being (b) is a state in which the object to be inspected is transported to the object to be inspected, and (c) is extracted after the object to be inspected is transported to the object to be inspected. The transport unit returns to its original position.

Fig. 10 is a flow chart showing the operation of the visual inspection device according to the embodiment of the present invention shown in Fig. 9.

Hereinafter, the visual inspection device of the present invention will be described in detail based on the embodiments shown in the drawings.

Fig. 1 is a schematic display of the configuration in which only an automatic inspection device is provided in a manufacturing system of an optical display device by the prior art.

In general, as shown in FIG. 1, the manufacturing system of the optical display device is provided with an optical film attaching device 3 on the upstream side, and an automatic check is provided at the downstream side of the optical film attaching device 3 Device 4.

The optical film attachment device 3 is used to manufacture a glass substrate to which an optical film is attached, that is, an optical display device (display panel). The automatic inspection device 4 automatically performs defect inspection on the optical display device to which the optical film is attached.

In the system of the prior art, since the body is judged to be based on the inspection result of the automatic inspection device alone, depending on the accuracy of the automatic inspection device, when the accuracy is low, When the defective optical display device is omitted and the defective optical display device is transported to the downstream side of the production line as a normal qualified product, on the other hand, if the accuracy is too high, it is judged to be normal. The optical display device also misjudges it as bad and causes unnecessary waste.

Therefore, it is desirable to provide the visual inspection device 1 at the downstream side of the automatic inspection device 4 after the automatic inspection device 4 for performing automatic defect inspection on the attached optical display device, and to visually inspect it. The accuracy of the determination result of the automatic inspection device is confirmed again.

Fig. 2 is a view schematically showing a configuration in which a visual inspection device is further provided in addition to the automatic inspection device in the optical display device manufacturing system of the present invention.

Specifically, for the optical display device that is not determined to be a defective optical display device by the automatic inspection device, it is desirable to perform a random inspection by the visual inspection device. Further, it is desirable that the optical display device that has been determined to be a defective optical display device by the automatic inspection device is visually inspected by the visual inspection device.

In the following description, an optical display device that has not been determined as a defective optical display device by the automatic inspection device and is randomly checked, and an optical display device that has been determined as a defective optical display device by the automatic inspection device are to be subjected to The optical display device is visually inspected, and is collectively referred to as a defective optical display device or an object to be inspected, and is indicated by the symbol 2b.

Hereinafter, the specific structure of the visual inspection device according to the embodiment of the present invention will be described in detail with reference to the drawings.

<First embodiment>

3a and 3b are a top view and a side view schematically showing the configuration of the visual inspection device of the present invention.

The visual inspection device 1 of the present invention is provided on the downstream side of the automatic inspection device 4 in the automatic inspection project, and visually inspects the optical display device (inspection object) 2, and is provided with the extraction conveyance unit 10 and the visual inspection. Check unit 20.

<Extraction and transport unit 10>

The extraction transport unit 10 is provided with a normal optical display device transport unit (normal inspection object transport unit) 10a and a lower side of the normal inspection object transport unit 10a as shown in FIG. 3(b). The defective optical display device transport unit (inspected object transport unit) 10b is disposed in the upper and lower stages.

The normal optical display device transport unit (normal inspection object transport unit) 10a is a non-transparent optical display device transport unit (inspected object transport unit) 10b, which is a normal optical display device (normal inspection target object) 2a. The person who transports the defective optical display device (object to be inspected) 2b.

At the entire production line, there is provided for the optical display device 2 (including the normal optical display device 2a and the poor optical display device) 2b) The sensor for real-time monitoring of the transport status.

When it is detected by the sensor (not shown) that the object 2b to be inspected is transported, the transport unit 10 is picked up, and the object to be inspected 2b is transported by the control device. The method of moving to the object to be inspected 1b is moved upward, and after the object 2b to be inspected is transported to the object to be inspected 10b, the extracting and transporting unit 10 is controlled by the control device. By the control, the object 2b is moved to the position where the normal inspection object 2a can be transported, and the object to be inspected 2b on the object to be inspected 10b is transported to the visual inspection unit by the adsorption device 301. 20 places. Thereafter, the visual inspection unit 20, which will be described in detail later, visually inspects the object 2b to be inspected which is transported.

4(a) to 4(c) are diagrams schematically showing the conveyance state of the optical display device in the visual inspection device 1 according to one embodiment of the present invention.

In the first embodiment of the present invention, as shown in FIGS. 4(a) to 4(c), the normal inspection object transport unit 10a is positioned above the object transport unit 10b. In the state shown in FIG. 4(a), the normal optical display device 2a is transported by the normal inspection object transport unit 10a. When the normal optical display device 2a is being transported, the normal inspection object transport unit 10a is positioned at a position that is substantially coplanar with the main transport unit of the production line, and the defective optical display device transport unit, that is, the object to be inspected is transported. The portion 10b is located below the main conveying portion.

As shown in FIG. 4b, when the defective optical display device, that is, the object to be inspected 2b is detected by the sensor, the transport unit 10 is controlled by the control device. In addition, the object to be inspected 10b is moved upward so as to be slightly coplanar with the main conveyance unit, and the defective optical display device, that is, the object 2b to be inspected, is transported to the defective optics. The display device transport unit, that is, the object transport unit 10b to be inspected. Further, as shown in FIG. 4(c), after the defective optical display device 2b is transported to the defective optical display device transport unit 10b, the transport unit 10 is extracted and returned to normal by the control of the control device. The optical display device transport unit 10a is moved to the lower side so as to be slightly coplanar with the main transport unit and capable of transporting the position of the normal optical display device 2a.

Preferably, in the normal optical display device transport unit 10a, a conventionally known transport device having a single-layer roll structure is used. In the transport apparatus of the single-layer roll structure, the optical display device can be transported in the main transport direction from the upstream of the main transport unit of the optical display device toward the downstream. The single-layer roll structure conveying device has a simple structure and is inexpensive.

Preferably, a transfer device having a double roll structure is used in the defective optical display device transport unit 10b. In the conveyance device of the double-layered roller structure, the optical display device can be conveyed in the main conveyance direction downstream from the upstream of the main conveyance portion of the optical display device, and can be viewed from above when viewed from above. The optical display device is transported in a vertical direction that is slightly perpendicular to the main transport direction. Transported by the double roll structure The device is capable of transporting in two directions that are slightly perpendicular. The above-described conveying device having a double roll structure will be described in detail later.

Therefore, the defective optical display device which is visually inspected, that is, the object 2b to be inspected, is always provided along the main transport direction by the defective optical display device transporting unit 10b having the double-roller structure transporting device. It is conveyed to the defective optical display device transport unit 10b. In the case of the defective optical display device 2b, the defective optical display device transport unit including the double-layered roller structure transporting device, that is, the object to be inspected 10b, is viewed from above when viewed from above. In the vertical direction which is slightly perpendicular to the main conveyance direction, the main conveyance unit is separated and conveyed to the visual inspection unit 20 for performing visual inspection.

Further, in the present embodiment, a robot arm (not shown) may be further provided. In the robot arm, an adsorption device 301 (FIG. 7a) is provided, and the adsorption device 301 can adsorb and transport the defective optical display device 2b that is transported in a direction slightly perpendicular to the main conveyance direction. Go to the visual inspection unit 20.

As long as the object 2b to be inspected as a defective optical display device can be adsorbed and transported to the visual inspection unit 20, the robot arm and the adsorption device can be used as the robot arm and the adsorption device.

<Transporting device with double roll structure>

As described above, it is preferable that the defective optical display device transport unit, that is, the object transport unit 10b to be inspected, has a double-layer roller. The transport device constructed. There is also a case where the conveying device having the double-layered roller structure is referred to as a double-direction conveying device 50. FIG. 5 is a schematic display of a state in which the optical display device is transported by the main transport direction transport device. Fig. 6 is a view schematically showing a state in which the optical display device is transported by the vertical transport device.

As shown in FIG. 5 and FIG. 6, the bidirectional conveying device 50 is a conveying device having a double roll structure. In the case of the specific description, the double-direction conveying device 50 includes a main conveying direction conveying device 501 that conveys the optical display device in the main conveying direction, and a horizontal direction that is slightly perpendicular to the main conveying direction when viewed from above. The lateral direction transport device 502 of the optical display device is transported in the direction.

The main conveyance direction conveying device 501 is a roller conveying device formed by a series of conveying rollers, and is capable of conveying the optical display device in the main conveying direction. In the main conveyance direction conveyance device 501, a specific number of conveyance rollers are provided on the rotatable conveyance roller shaft, and the conveyance roller row is comprised. The plurality of transport roller rows are arranged side by side in a predetermined interval along the main transport direction, and a transport device that transports the optical display device along the main transport direction is formed.

The horizontal conveying device 502 is a roller conveying device formed by a series of conveying rollers, and conveys the optical display device in a lateral direction that is slightly perpendicular to the main conveying direction when viewed from above. In the lateral conveying device 502, a specific number of conveying rollers are provided on the conveying roller shaft to constitute a conveying roller row. The plurality of conveying roller rows are arranged in parallel and arranged at a predetermined interval in a lateral direction slightly perpendicular to the main conveying direction. The optical display device can be transported in a lateral direction that is slightly perpendicular to the main transport direction when viewed from above.

In other words, when viewed from above, the conveyance roller row of the main conveyance direction conveyance device 501 is disposed so as to be orthogonal to the conveyance roller row of the lateral conveyance device 502.

The distance between the transport roller rows of the main transport direction transporting device 501 is at least a larger distance than the thickness of the transport roller row of the lateral transport device 502. In other words, the conveyance roller of the lateral conveyance device 502 can pass between the conveyance roller rows of the main conveyance direction conveyance device 501.

Moreover, the distance between the conveyance rollers of the lateral conveyance device 502 is at least a larger distance than the diameter of the conveyance roller of the main conveyance direction conveyance device 501. In other words, the conveyance roller of the main conveyance direction conveying device 501 can pass between the conveyance roller rows of the conveyance device 502 in the lateral direction.

As a result, the lateral conveying device 502 can be lifted and lowered independently from the main conveying direction conveying device 501.

In addition, the diameter of the conveying roller constituting the lateral conveying device 502 is larger than the diameter of the conveying roller constituting the main conveying direction conveying device 501.

The bidirectional conveying device 50 further includes a switching device (not shown) that switches between the main conveying direction conveying device 501 and the horizontal conveying device 502.

As shown in Figure 5, along the optical display In the process of transporting the optical display device toward the downstream main transport direction on the upstream side of the main transport unit, the main transport direction transport device 501 is positioned above the lateral transport device 502. In other words, the surface of the conveying roller constituting the main conveying direction conveying device 501 is positioned higher than the surface of the conveying roller constituting the lateral conveying device 502. Therefore, the optical display device sent from the upstream in the main transport direction can be received by the main transport direction transport device 501, and can be transported toward the downstream side.

As shown in FIG. 6 , after the object to be inspected 2 b which is a defective optical display device is transported to the object to be inspected 10 b , the double roller structure of the bidirectional conveying device 50 is switched. In other words, the horizontal conveying device 502 is raised by the switching device, and the surface of the conveying roller constituting the lateral conveying device 502 is positioned higher than the surface of the conveying roller of the main conveying direction conveying device 501. At this position, the optical display device can be transported in the direction perpendicular to the main transport direction by the lateral transport device 502.

According to the bidirectional conveying apparatus 50 configured as described above, the conveyance in the main conveyance direction and the conveyance in the direction perpendicular to the main conveyance direction can be simultaneously performed.

<Visual inspection unit 20>

7(a) and 7(b) are diagrams schematically showing the horizontal state and the inclined state of the visual inspection unit in the visual inspection device of the present invention.

The visual inspection unit 20 is provided as a visual inspection device, and is provided with a visual inspection table that is horizontal when the object to be inspected 2b is transported, and can be moved from the horizontal state to the inspection state when the inspection is performed. Tilted state.

The visual inspection unit 20 includes an optical display device holding portion 21 for holding the defective optical display device 2b to be inspected as an object to be inspected, and tilting the optical display device holding portion 21 to operate. A panning unit 22 that irradiates light from the back side of the defective optical display device 2b when the visual display is tilted at an appropriate angle (not shown) and when the defective optical display device 2b is raised and tilted .

The defective optical display device 2b to be visually inspected is transported to the optical display device holding portion 21 in the horizontal state shown in FIG. 7(a) by the above-described general adsorption device 301 provided at the robot arm. At the office. The above-described rocking mechanism is controlled by a control means (not shown), and the optical display device holding portion 21 on which the defective optical display device 2b is placed is shaken, and tilted and raised to visually inspect the operator. In the case of an appropriate angle, it is set to an inclined state. As shown in FIG. 7(b), in this inclined state, the inspection light is irradiated from the back side of the optical display device holding portion 21, and the operator can visually check the defective optical display device 2b. .

As a result of the inspection, the optical display device determined to be the normal optical display device 2a is returned to the defective optical display device transport unit 10b via the adsorption device provided at the robot arm after the inspection. The defective optical display device transport unit 10b is moved upward so as to be slightly coplanar with the main transport unit, and transports the normal optical display device 2a to the downstream side.

The inspection result is an optical display device 2b that is determined to be defective, and is discharged after the inspection and reworked or discarded.

Further, the defective optical display device 2b is transported to the visual inspection unit 20 from the main transport unit, visually inspected at the visual transport unit, and returned to the main transport unit by the qualified optical display unit. In this case, it is not necessary to touch the optical display device with a human hand, and it is possible to prevent the optical inspection device from being stained or damaged.

Fig. 8 is a flow chart showing the operation of the visual inspection device according to one embodiment of the present invention. Hereinafter, an operation of the visual inspection device 1 according to this embodiment of the present invention will be described with reference to Fig. 8 .

First, in step S11, an optical film is attached to a glass substrate to form an optical display device 2, and the optical display device 2 is transported to the automatic inspection device 1. Thereafter, in step S12, an automatic inspection (automatic optical inspection) is performed on the optical display device 2. Next, in step S13, it is determined whether or not there is a defect in the optical display device 2 by automatic inspection. When it is judged as "YES", that is, when a defect is detected, the process proceeds to step S21. When it is judged as "NO", that is, when no defect is detected, the process proceeds to step S14. In step S14, it is determined whether it is necessary to perform random inspection on the optical display device 2. When it is judged as "YES", that is, when it is necessary to perform random inspection, the process proceeds to the step. S21. When it is judged as "NO", that is, when random inspection is not required, the process proceeds to step S15, and the extraction and transport unit 10 does not operate, and the optical display device is transported to the next project. At the office.

When it is judged as "YES" in step S13, that is, when a defect is detected, the process proceeds to step S21.

When it is judged as "YES" in step S14, that is, when it is necessary to perform random inspection, the process proceeds to step S21.

When the process proceeds to step S21 after step S13 or step S14, the optical display device to be visually inspected is collectively referred to as "bad optical display device 2b" or "inspected object 2b".

In the program started in step S21, the visual inspection device 1 performs visual inspection on the defective optical display device 2b. In step S21, the defective optical display device 2b is transported to a position (referred to as a side upstream position) of the side of the extraction transport unit 10 upstream of the extraction transport unit 10. In step S22, the extraction transport unit 10 operates (that is, the extraction transport unit 10 is raised). In step S23, the defective optical display device 2b is sent to the lower stage of the extraction/transport unit 10 (the defective optical display device transport unit 10b). Thereafter, in step S24, the extraction transport unit 10 operates, and the extraction transport unit 10 is lowered. In step S25, the defective optical display device 2b is transported to the visual inspection unit 20. In step S26, the visual inspection of the defective optical display device 2b is performed visually. In step S27, It is determined whether or not a defect is detected in the defective optical display device 2b by visual inspection.

When it is judged as "YES" in step S27, that is, when a defect is detected, the process proceeds to step S31, and it is determined that there is a defect in the defective optical display device 2b. After that, the process proceeds to step S32, and the defective optical display device 2b is transported to the lower stage of the extraction/transport unit 10 (the defective optical display device transport unit 10b). In step S33, it is determined whether or not another optical display device exists at or upstream of the normal optical display device transport portion 10a positioned above the extraction transport unit 10.

When it is judged as "YES" in step S33, the process returns to this step, and the determination is made again.

When it is judged as "NO" in step S33, the process proceeds to step S41, the extracting and transporting unit 10 is operated, the extracting and transporting unit 10 is raised, and then the process proceeds to step S42. In step S42, the defective optical display device 2b is transported to the defective optical display device housing portion.

When it is determined as "NO" in step S27, that is, when no defect is detected, the process proceeds to step S28. In step S28, the defective optical display device 2b is transported to the defective optical display device transport unit 10b positioned at the lower stage of the extraction transport unit 10, and the process proceeds to step S29. In step S29, it is determined whether or not the optical display device is already present at or upstream of the normal optical display device transport portion 10a positioned above the ejector transport unit 10.

When it is judged as "YES" in step S29, the process returns to this step, and the determination is made again.

When it is judged as "NO" in step S29, the process proceeds to step S51, the extraction/transport unit 10 is operated, the extraction/transport unit 10 is raised, and then the process proceeds to step S52. In step S52, the defective optical display device 2b is transported to the next engineering site as the normal optical display device 2a. In addition, when it is judged as "NO" in step S27, that is, when no defect is detected, as long as it is after that, it can be The defective optical display device 2b of the object to be inspected is recognized as the normal optical display device 2a. Thereafter, the process proceeds to step S52.

<Second embodiment>

9(a) to 9(c) are diagrams schematically showing the conveyance state of the optical display device in the visual inspection device 1 according to another embodiment of the present invention.

In the second embodiment of the present invention, the structure of the extraction/transport unit 10 is the same as that of the first embodiment, and the other structures are all the same. Here, the description of the same portions will be omitted.

In the case of the specific description, the extracting and transporting unit 10 can be configured to have a structure similar to that of the second embodiment of the present invention.

In the second embodiment, as shown in Figs. 9(a) to 9(c), the normal inspection object transport unit 10a is arranged. Below the object transport unit 10b to be inspected. In the state shown in FIG. 9(a), the normal optical display device 2a is transported by the normal optical display device transport unit 10a. When the normal optical display device 2a is being transported, the normal optical display device transport unit 10a is located at a position that is substantially coplanar with the main transport unit of the production line, and the defective optical display device transport unit, that is, the object to be inspected The conveying unit 10b is located above the main conveying unit.

As shown in FIG. 9(b), when it is detected by the sensor that the defective optical display device 2b is transported, the transport unit 10 is extracted by the control device. The object to be inspected 10b is moved to the lower side so as to be slightly flush with the main conveyance unit, and the defective optical display device 2b is conveyed to the defective optical display device transport unit 10b. Further, as shown in FIG. 9(c), after the defective optical display device 2b is transported to the defective optical display device transport unit 10b, the transport unit 10 is extracted and returned to the control unit by the control device. The normal optical display device transport unit 10a moves upward while being slightly coplanar with the main transport unit and capable of transporting the normal optical display device 2a.

In the second embodiment, it is preferable to use a transfer device having a normal single-layer roll structure in the normal optical display device transport unit 10a and the defective optical display device transport unit 10b. In the transport apparatus of the single-layer roll structure, the optical display device can be transported in the main transport direction from the upstream of the main transport unit of the optical display device toward the downstream. The single-layer roll structure conveying device has a simple structure and is inexpensive.

Further, in the present embodiment, as in the first embodiment, a robot arm (not shown) may be provided. At the robot arm, an adsorption device 301 is provided, and the defective optical display device 2b on the defective optical display device transport unit 10b can be adsorbed and transported to the visual inspection unit 20 by the adsorption device 301.

As long as the defective optical display device 2b can be adsorbed and transported to the visual inspection unit 20, the mechanical arm and the adsorption device of the prior art can be used at the robot arm and the adsorption device.

In the second embodiment, as in the above, other structures are the same as those in the first embodiment. The same components are denoted by the same reference numerals, and the description thereof will be omitted.

Fig. 10 is a flowchart showing the operation of the visual inspection device according to the second embodiment of the present invention. Hereinafter, an operation of the visual inspection device 1 according to the second embodiment of the present invention will be described with reference to Fig. 10 .

First, in step S11, an optical film is attached to a glass substrate to form an optical display device 2, and the optical display device 2 is transported to the automatic inspection device 1. In step S12, an automatic inspection (automatic optical inspection) is performed on the optical display device 2. In step S13, it is determined whether or not there is a defect in the optical display device 2 by automatic inspection. When it is judged as "YES", that is, when a defect is detected, the process proceeds to step S21. When it is judged as "NO", that is, when no defect is detected, the process proceeds to step S14. In step S14, it is determined whether it is necessary to perform random inspection on the optical display device 2. When it is judged as "YES", that is, when there is a certain In the case where a random check is to be performed, the process proceeds to step S21. When it is judged as "NO", that is, when random inspection is not required, the process proceeds to step S15, and the extraction and transport unit 10 does not operate, and the optical display device is transported to the next project. At the office.

When it is judged as "YES" in step S13, that is, when a defect is detected, the process proceeds to step S21.

When it is judged as "YES" in step S14, that is, when it is necessary to perform random inspection, the process proceeds to step S21.

After step S13 or step S14, the process proceeds to step S21, and the optical display device subjected to visual inspection is collectively referred to as "bad optical display device 2b" or "inspected object 2b".

According to the procedure from step S21, the visual inspection device 1 performs visual inspection on the defective optical display device 2b. In step S21, the defective optical display device 2b is transported to a position (referred to as a side upstream position) of the side of the extraction transport unit 10 upstream of the extraction transport unit 10. Thereafter, in step S22', the extraction transport unit 10 operates, and the extraction transport unit 10 is lowered. Next, in step S23', the defective optical display device 2b is transported to the defective optical display device transport unit 10b positioned at the upper stage of the extracting and transporting unit 10. Thereafter, in step S24', the extraction transport unit 10 is operated, and the extraction transport unit 10 is raised. Thereafter, in step S25, the defective optical display device 2b is transported to the visual inspection unit 20, and in step S26, the visual inspection is performed visually on the defective optical display device 2b. Connect In step S27, it is determined whether or not a defect is detected in the defective optical display device 2b by visual inspection.

When it is judged as "YES" in step S27, that is, when a defect is detected, the process proceeds to step S31, and it is determined that there is a defect in the defective optical display device 2b. Thereafter, the process proceeds to step S32', and the defective optical display device 2b is transported to the defective optical display device transport unit 10b positioned at the upper stage of the estaking transport unit 10. In step S33', it is determined whether or not another optical display device exists at the normal optical display device transport portion 10a positioned at the lower portion of the escrow transport unit 10 or at the upstream side thereof.

When it is judged as "YES" in step S33', the process returns to this step, and the determination is made again.

When it is judged as "NO" in step S33', the operation proceeds to step S41', the extraction/transport unit 10 operates, and the extraction/transport unit 10 is lowered. Thereafter, the process proceeds to step S42, and in step S42, the defective optical display device 2b is transported to the defective optical display device housing portion.

When it is determined as "NO" in step S27, that is, when no defect is detected, the process proceeds to step S28'. In step S28', the defective optical display device 2b is transported to the defective optical display device transport unit 10b positioned at the upper stage of the extracting and transporting unit 10. After that, the process proceeds to step S29'. In step S29', it is determined whether or not another optical display already exists at the normal optical display device transport portion 10a positioned at the lower portion of the escrow transport unit 10 or at the upstream side thereof. Device.

When it is judged as "YES" in step S29', the process returns to this step, and the determination is made again.

When it is judged as "NO" in step S29', the operation proceeds to step S51', the extraction/transport unit 10 operates, and the extraction/transport unit 10 is lowered. Thereafter, the process proceeds to step S52. In step S52, the defective optical display device 2b is transported to the next engineering site as the normal optical display device 2a. In addition, when it is judged as "NO" in step S27, that is, when no defect is detected, as long as it is after that, it can be The defective optical display device 2b of the inspection object is recognized as the normal optical display device 2a. Thereafter, the process proceeds to step S52.

The visual inspection device of the present invention is generally as described above, but is not limited thereto, and can be appropriately modified within the scope of the inventive concept.

[Industrial availability]

The visual inspection device of the present invention can be applied to various types of manufacturing apparatuses for manufacturing sheet-like members.

Claims (5)

A visual inspection device (1) comprising: an extraction transport unit (10) and a visual inspection unit (20), which are provided on the downstream side of the automatic inspection device and used for the object to be inspected (2) The inspection and conveyance unit (10) is configured such that the normal inspection object transport unit (10a) and the object transport unit (10b) are placed on the upper and lower sides, and the normal inspection object is transported. In the part (10a), the object to be inspected (2b) is transported, and the object to be inspected (10b) is the object to be inspected (2b), and the sensor is detected by the sensor. When the object to be inspected (2b) is transported, the pick-and-place transport unit (10) is moved up and down until the object to be inspected (2b) is transported to the object to be inspected by the control of the control device. At the position of the transport unit (10b), after the object to be inspected (2b) is transported to the object transport unit (10b), the transport unit (10) is controlled by the control unit. Control, and back to be able to carry normal inspection pairs The object to be inspected (10b) is moved in a manner of a position of the object (2a), and is a bidirectional conveying device (50) having a double roll structure, and the bidirectional conveying device (50) The system has a main transport direction for transporting the optical display device in the main transport direction. And a device (502) that transports the optical display device in a lateral direction that is slightly perpendicular to the main transport direction when viewed from above, and is configured such that the object to be inspected (2b) is main When the conveyance direction is transported, the upper surface of the main conveyance direction conveyance device (501) is positioned above the upper surface of the lateral conveyance device (502), and the object to be inspected (2b) is in the lateral direction. When the upper side is transported, the upper position of the lateral conveying device (502) is moved up and down so as to be higher than the upper surface of the main conveying direction conveying device (502), thereby The object to be inspected (2b) on the object to be inspected (10b) is transported to the visual inspection unit (20), and the operator is visually observed to be transported by the visual inspection unit (20). The object to be inspected (2b) was visually inspected. The visual inspection device according to the first aspect of the invention, wherein the normal inspection object transport unit (10a) is positioned above the object transport unit (10b) and transports a normal inspection object ( In the case of 2a), the normal inspection object transport unit (10a) is located at a position coplanar with the main transport unit, and the object transport unit (10b) is positioned below the main transport unit. When the sensor detects that the object to be inspected (2b) is transported, the extracting and transporting unit (10) is controlled by the control device. By the control, the object to be inspected (10b) is moved upward toward the position where the main conveyance unit is coplanar, and the object to be inspected (2b) is conveyed to the object to be inspected ( (10b), after the object to be inspected (2b) is transported to the object to be inspected (10b), the extraction and transport unit (10) is controlled by the control device. The normal inspection object transport unit (10a) moves downward so as to be coplanar with the main transport unit and can transport the normal inspection object (2a), and the object to be inspected (10b) The object to be inspected (2b) is transported to the visual inspection unit (20). The visual inspection device according to the first aspect of the invention, wherein the normal inspection object transport unit (10a) is positioned below the object transport unit (10b) and transports a normal inspection object ( In the case of 2a), the normal inspection object transport unit (10a) is located at a position coplanar with the main transport unit, and the object transport unit (10b) is positioned above the main transport unit by When the sensor detects that the object to be inspected (2b) has been transported, the extraction and transport unit (10) is controlled by the control device and faces the object transport unit (10b). The main conveyance unit is moved downward in a coplanar position, and the object to be inspected (2b) is conveyed to the object to be inspected (10b), and the object to be inspected (2b) is Transfer to the aforementioned inspection After the object transport unit (10b) is inspected, the pick-and-place transport unit (10) is controlled by the control device to return the normal inspection object transport unit (10a) to be coplanar with the main transport unit. The object to be inspected (2b) is moved upward, and the object to be inspected (2b) on the object to be inspected (10b) is transported to the visual inspection unit (20). The visual inspection device according to any one of the first to third aspects of the invention, wherein the visual inspection device further includes an adsorption device (301) on the object to be inspected (10b). The object to be inspected (2b) is transported from the object to be inspected (10b) to the visual inspection unit (20) by the adsorption device (301). The visual inspection device according to any one of the first to third aspects of the present invention, wherein the visual inspection device is provided with a visual inspection table when the object to be inspected (2b) is transported. It will be in a horizontal state and can be moved from a horizontal state to a tilted state when checking.