JP2002296199A - Printed board inspection machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printed board inspection machine in which a printed board is conveyed in an inclined state, and when the board is imaged, the printed board is conveyed in a very stable state to capture an accurate image of the board. SOLUTION: The invention includes a conveying apparatus 1, a carry-in device 2, an inspection device 3 and a carry-out device 4, which are arranged as shown in the drawing. The conveying apparatus 1 includes a first conveying device 5 for conveying the printed board P for imaging it by a line sensor 61, and a second conveying device 6 for conveying the board P after imaging. The first conveying device 5 has an inclined plate 9, which is disposed directing to a conveying direction of the board P and inclined at a predetermined angle θwith a reference plane. The board P leans with its entire surface against the plate 9 and is forcibly conveyed in this state, being placed on a conveying table 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed board inspection machine for inspecting the appearance of a printed board.

[0002]

2. Description of the Related Art Conventionally, as an apparatus for inspecting a printed board of this type, for example, the invention described in Japanese Patent Application Laid-Open No. 8-334473 is known. This printed circuit board inspection machine scans the front and back surfaces of the printed circuit board while the printed circuit board is being conveyed by the transfer means for conveying the printed circuit board in a vertical state, and acquires images of the front and back surfaces. Optical system for scanning. Further, the above-mentioned transport means is constituted by a transport belt for mounting and transporting the printed board, and a holding means for vertically holding the printed board above the transport belt.

In the printed board inspecting machine having such a configuration, the printed board is transported on a transport belt, and during the transport, the printed board is vertically held by the holding means. Then, when the printed circuit board passes through the scanning optical system, the front and back surfaces of the printed circuit board are photographed by the imaging means (camera), and a desired image can be obtained.

[0004] For this reason, in the conventional printed board inspection machine, since the printed board is transported in a vertical state, there is an advantage that images of the front and back surfaces of the printed board can be obtained at one time.

[0005]

However, in the conventional printed circuit board inspection machine, the printed circuit board is conveyed while being mounted on the conveying belt in a vertical state as described above. The contact area for contact is reduced. For this reason, the printed circuit board is liable to slip on the conveyor belt during the transfer, and a problem that an accurate image of the front surface or the back surface of the printed circuit board cannot be captured easily occurs.

Further, during the transportation of the printed circuit board,
Since the printed circuit board is held vertically by the holding means, and the printed circuit board is more likely to slip on the conveyor belt by this holding, there is a problem that the possibility of occurrence of the above-mentioned problem is further increased. In view of the above, an object of the present invention is to transport a printed circuit board in an inclined state, but to print the printed circuit board in an extremely stable state when capturing an image of the printed circuit board. An object of the present invention is to provide a printed circuit board inspection machine capable of capturing an accurate image of a board.

[0007]

Means for Solving the Problems In order to solve the above-mentioned problems and achieve the object of the present invention, the respective inventions according to claims 1 to 12 are configured as follows. In other words, the invention according to claim 1 is an inspection of a printed circuit board in which an inspection surface of the printed circuit board is imaged by an image pickup means while the printed circuit board is being conveyed by a conveyance device, and the appearance of the printed circuit board is inspected based on the image. Machine, the transport device is disposed in the transport direction of the printed circuit board, comprising an inclined member having an inclined surface inclined at a predetermined angle with respect to a reference horizontal plane, when imaging by the imaging means, The printed board is transported in a state where the entire board surface of the printed board is along the inclined surface, and after the end of the imaging, the printed board is transported by guiding the upper end of the printed board to the inclined surface. It is characterized by the following.

According to a second aspect of the present invention, in the printed board inspecting apparatus according to the first aspect, an area corresponding to the inclined member and corresponding to a transport path when the image pickup means takes an image of the printed circuit board. Is provided with a photographing slit, and the photographing means captures an image of the inspection surface of the printed circuit board through the photographing slit.

According to a third aspect of the present invention, in the printed circuit board inspection apparatus according to the first or second aspect, the imaging means and the inclined member are installed on a gantry via a vibration isolating mechanism. It is characterized by having made it.
According to a fourth aspect of the present invention, in the printed board inspecting machine according to any one of the first to third aspects, a loading device for loading the printed board into the transport device;
And an unloading device for unloading the printed circuit board from the transport device.

According to a fifth aspect of the present invention, in the printed circuit board inspection apparatus according to any one of the first to fourth aspects, the transport device is configured to perform imaging by the imaging unit.
A first transfer device for setting the entire board surface of the printed circuit board along the inclined surface of the inclined member, maintaining the state, placing the printed circuit board on a transfer table, and transferring the printed circuit board at a constant speed; The finished printed circuit board is placed in the first
And a second transport device for receiving the transfer board from the transport device and transporting the printed circuit board by an endless belt while guiding the upper end of the print substrate by the inclined surface of the inclined member.

As described above, in each of the first to fifth aspects of the present invention, when the printed circuit board is imaged by the imaging means, the entire surface of the printed circuit board is aligned with the inclined surface of the inclined member. The printed circuit board was transported. For this reason, when the printed circuit board is imaged by the imaging means, the printed circuit board can be transported in a very stable state, and an accurate image of the appearance of the printed circuit board can be obtained.

According to the third aspect of the present invention, since the anti-vibration mechanism is provided, the relative positional relationship between the imaging means and the inclined member is kept constant even if the gantry shakes for some reason. Therefore, the imaging unit can image the printed circuit board without being affected by vibration applied to the gantry. Claim 6
The printed board inspection apparatus according to claim 5, wherein the first transport device is arranged in a transport direction of the printed board, and is inclined at a predetermined angle with respect to a reference horizontal plane. A transport table for placing the printed circuit board on the entire surface of the printed circuit board along the inclined plate, and transporting the printed circuit board in this state; and a transfer position of the transfer table by the loading device and the second transfer. A reciprocating mechanism for reciprocating the transfer table between the transfer table and the transfer table at a predetermined constant speed when the transfer table transfers the printed circuit board; The angle between the surface and the plate surface of the inclined plate is substantially a right angle.

As described above, according to the sixth aspect of the present invention,
The first transfer device sets the entire board surface of the printed board along the inclined plate, and transfers the printed board on the transfer table in that state. Further, the angle between the transfer surface of the transfer table and the plate surface of the inclined plate is set to be substantially a right angle. For this reason, for example, as shown in FIG. 17, the gravitational force G acting on the printed circuit board P during the transfer is a force G1 for pressing the inclined plate 9 and a force G2 for pressing the transfer table 31
Is decomposed into The force G <b> 1 pushing the inclined plate 9 is dispersed throughout the inclined plate 9, and acts as a force for the printed board P to always contact the inclined plate 9 during the transportation of the printed board P. On the other hand, the force G2 pressing the transfer table 31 is a force approximating the gravity G, which concentrates on the lower end surface of the printed circuit board P,
It acts as a force for positioning and fixing the printed circuit board P on the transport table 31.

For this reason, even if there is no mechanism (means) for fixing the printed circuit board P to the transfer table 31, the printed circuit board P on the transfer table 31 does not rattle.
It is transported stably and smoothly at a constant speed. Therefore, when the printed circuit board is imaged by the imaging means, the printed circuit board can be transported in a very stable state, and an accurate image of the appearance of the printed circuit board can be obtained.

According to a seventh aspect of the present invention, in the printed circuit board inspecting apparatus according to the fifth or sixth aspect, the second transporting device is arranged in a transport direction of the printed substrate, and is provided with a reference horizontal plane. An inclined plate inclined at a predetermined angle with respect to the end plate, and an upper end of the printed circuit board is brought into contact with the inclined plate, and in this state, a metal endless belt for carrying and carrying the printed circuit board, and rotating the endless belt A drive mechanism for driving the endless belt, and an angle formed between a conveying surface of the endless belt and a plate surface of the inclined plate is substantially a right angle.

According to the seventh aspect of the present invention, a printed circuit board for which imaging has been completed by the imaging means can be conveyed to the carry-out device in a relatively stable and stable state. According to an eighth aspect of the present invention, in the printed board inspecting apparatus according to the sixth or seventh aspect, the first transport device is configured to load the printed board onto the transport table by the loading device. A positioning unit for positioning the printed circuit board on the transfer table, wherein the positioning unit moves to a predetermined position on the transfer table when the positioning member is positioned on the transfer table. A positioning mechanism having a positioning piece, wherein the positioning piece has a tip applied to the printed board with a constant pressing force.

According to the eighth aspect of the present invention, when the printed circuit board is loaded on the transfer table by the loading device, accurate positioning can be performed. According to a ninth aspect of the present invention, in the printed circuit board inspection machine according to any one of the sixth to eighth aspects, the transport table of the first transport device has a discharge-side end having a width equal to the width of the transport table. It is characterized in that it is gradually inclined downward toward the direction.

According to the ninth aspect of the present invention, when the printed circuit board on the transfer table is transferred from the transfer table to the endless belt of the second transfer device, the transfer is smooth and stable. And it does not hurt the printed circuit board. According to a tenth aspect of the present invention, in the printed board inspecting machine according to any one of the seventh to ninth aspects, the printed board is arranged along the inclined plate side of the endless belt of the second transport device. A guide member for guiding the lower end side is provided.

According to the tenth aspect of the present invention, when the printed board is transported on the endless belt, the partial contact between the printed board and the inclined plate is kept constant. Thus, the printed circuit board can be guided in the transport direction, and can contribute to stabilization of the transport. According to an eleventh aspect of the present invention, in the inspection apparatus for a printed circuit board according to any one of the fifth to tenth aspects, the loading device is arranged along the first transport device, and the first transport device is provided. An inclining plate that inclines in a state where the side is high, aligns a plurality of the printed circuit boards in a vertical state on the surface thereof and aligns the printed circuit boards, a feed mechanism that sends the aligned printed circuit boards to the first transport device, And a transfer mechanism for sucking and transferring the printed circuit board sent by the mechanism to the transfer table of the first transfer device with a vacuum pad.

According to the eleventh aspect of the present invention, the printed circuit boards can be reliably and quickly transferred one by one onto the transfer table of the first transfer device. According to a twelfth aspect of the present invention, in the printed board inspecting machine according to any one of the fifth to eleventh aspects, the unloading device is arranged along the second transport device, and removes a non-defective printed circuit board. A non-defective product loading table, a defective product loading table arranged along the second transport device for loading a defective printed circuit board, and a defective substrate according to the quality of the printed circuit board conveyed by the second transport device. A transfer means for selectively transferring a printed circuit board to the non-defective product loading table and the defective product loading table is provided.

According to the twelfth aspect of the present invention, the printed circuit board conveyed by the second conveying device is selectively transferred to the non-defective product loading table or the defective product loading table in accordance with the quality of the printed circuit board. Can be transported.

[0022]

Embodiments of the present invention will be described below with reference to the drawings. The configuration of an embodiment of the printed board inspection machine of the present invention will be described with reference to the drawings. As shown in FIG. 1, the printed board inspection apparatus according to this embodiment includes a transport device 1 that transports a printed board P for inspection, and the printed board P is transported along the transport device 1 along the transport device 1. A loading device 2 for loading into
An inspection device 3 for inspecting the quality of the printed circuit board P by photographing the inspection surface (front surface or back surface) of the printed circuit board P transported by the transport device 1 with an imaging unit (camera), and inspecting the printed circuit board P with the inspection device 3 An unloading device 4 that unloads the printed circuit board P from the transport device 1 is arranged as illustrated.

As shown in FIG. 1, the transport device 1 comprises a first transport device 5 for transporting the printed circuit board P carried in by the carry-in device 2 in an extremely stable state for inspection by the inspection device 3,
The second transport device 6 which receives the printed circuit board P discharged from the first transport device 5 and transports it to the unloading device 4
It is composed of The second transport device 6 includes an upstream transport unit 7 and a downstream transport unit 8. The first transport device 5 and the second transport device 6 are configured as shown in FIG.
And two inclined plates 9 and 10, which are inclined members as shown in FIG.

Next, the configuration of the loading device 2 will be described with reference to FIGS.
This will be described with reference to FIG. The carry-in device 2 arranges the printed circuit boards P in a vertical state, and at the time of carry-in of the printed circuit boards P, sends the printed circuit boards P toward the first transport device 5, and sends out the printed circuit boards P from the aligning section 11. And a printed board transfer section 12 for transferring the printed board P onto a transfer table 31 of the first transfer device 5 described below.

As shown in FIG. 3, the printed board alignment section 11 has a metal inclined plate 14 installed on a gantry 13, and a synthetic resin sheet 15 is overlaid on the upper surface of the inclined plate 14. The printed circuit board P is arranged vertically on the sheet 15 so as to overlap. The front side of the inclined plate 14 (the discharge side of the printed circuit board P) is the first transfer device 5.
And is installed on the gantry 13 so that the front side of the table is inclined in a high state. A reference member 20 for positioning the printed circuit board P aligned on the sheet 15 is provided at an end of the sheet 15.
Are provided in the alignment direction of the printed circuit board P.

Further, a feeding mechanism 16 for feeding a printed board P to be aligned with the sheet 15 is provided in the printed board aligning section 11.
Is provided. The feed mechanism 16 includes a moving member 18 that moves along the length direction of the left and right slits 17 formed in the inclined plate 14 and the sheet 15, and a plate of the printed circuit board P on the sheet 15 attached to the moving member 18. It is composed of an extruding plate 19 for extruding a surface. The moving member 18 can be moved by a motor (not shown) guided by a linear guide (not shown) disposed on the lower surface side of the inclined plate 14.

As shown in FIG. 1, the printed board transfer section 12 is arranged at a position facing the printed board alignment section 11 with the first transfer device 5 and the inclined plate 9 interposed therebetween. As shown in FIG. 5, the printed board transfer section 12 includes a vacuum pad 21 for sucking the printed boards P one by one, and a vacuum pad moving mechanism 22 for moving the vacuum pad 21 in the transfer direction of the printed board P. Is done. As shown in FIG. 5, the inclined plate 9 is provided with a vacuum pad opening 23 through which the vacuum pad 21 can pass when the printed circuit board P is transferred.

The vacuum pad moving mechanism 22 includes a vacuum pad 2
1 is provided, and the vacuum pad fixing member 24 is screwed to a screw (not shown). Then, by rotating the screw by a motor 25, the vacuum pad rotating member 24 is guided by a guide 26 and fed in the direction of the arrow in FIG.

The vacuum pad 21 is fixed to the vacuum pad fixing member 24, as shown in FIG. 5, and the fixing position can be appropriately adjusted within a predetermined range by the fixing position adjusting means 27. ing. Next, the configuration of the first transport device 5 will be described with reference to FIGS. 1, 6, and 10. FIG.

As shown in FIGS. 1 and 6, the first transport device 5 is installed in the transport direction of the printed circuit board P, and is inclined at a predetermined angle θ with respect to a horizontal plane (reference plane). A state in which the inclined plate 9 is provided, and the entire surface of the printed circuit board P is arranged along the inclined plate 9 (a state in which the inclined surface is in contact with the inclined plate 9)
In this state, the printed circuit board P is placed on the transport table 31 and is forcibly transported.

During the transportation of the printed circuit board P,
As shown in FIG. 17, the gravity G acting on the printed circuit board P is
The force G1 for pushing the inclined plate 9 and the force G for pushing the transfer table 31
Decomposed into 2. The force G <b> 1 pushing the inclined plate 9 is dispersed throughout the inclined plate 9, and acts as a force that the printed board P always contacts the inclined plate 9 during the conveyance of the printed board P.
On the other hand, the force G2 pressing the transfer table 31 is a force approximate to the gravity G, which concentrates on the lower end surface of the printed circuit board P and acts as a force for positioning and fixing the printed circuit board P on the transfer table 31.

Therefore, the inclination angle θ is set so that the printed board P on the transfer table 31 can be stably and smoothly transferred without rattling even if there is no mechanism for fixing the printed board P to the transfer table 31. For example, the optimum value of the inclination angle θ is about 75 degrees. The inclined plate 9 is attached to a part of the mounting frame 68 so as to be inclined at the inclination angle θ as described above, and anti-vibration springs 69 are provided at four lower portions of the mounting frame 68.
The mounting frame 68 is mounted on the base 7 via the four vibration isolating springs 69.
0.

More specifically, the first transport device 5 reciprocates the inclined plate 9, the transport table 31, and the transport table 31 between the loading position of the loading device 2 and the transfer position of the second transport device 6, and And a reciprocating mechanism 32 for moving the transport table 31 at a predetermined constant speed. The angle between the transfer surface of the transfer table 31 and the plate surface of the inclined plate 9 is configured to be substantially a right angle.

The transport table 31 is, as shown in FIG.
It includes a vertical portion 33 and a horizontal mounting portion 34 that extends at a right angle from the end of the vertical portion 33 and carries the printed circuit board P thereon. On the discharge side of the receiver 34, the receiver 34
When the upper printed circuit board P is dropped onto an endless belt 91 described later, an inclined surface 43 is formed to smoothly drop the printed board P and reduce an impact.

FIG. 9 shows one end of the transfer table 31.
1 is provided (see FIG. 1).
0). The positioning member 35 is provided on the transfer table 31.
When the printed circuit board P is loaded thereon, the printed circuit board P is positioned on the transfer table 31 and, when the printed circuit board P is transferred, a function of pressing an end of the printed circuit board P is provided. .

As shown in FIGS. 7 and 10, the reciprocating mechanism 32 is formed on the back side of the inclined plate 9 and along the length direction of the slit 36 provided in the inclined plate 9. That is, as shown in FIG. 10, the reciprocating mechanism 32 includes a reciprocating member 37 for reciprocating the transport table 31 and a reciprocating member 37 fitted to the reciprocating member 37 to move the reciprocating member 37 in the moving direction of the transport table 31. A guide member 38 for guiding the
The reciprocating member 37 is constituted by a motor (not shown) which reciprocates by guiding the reciprocating member 37 by a guide member 38. The transport table 31 and the reciprocating member 37 are connected by a connecting member 39 that penetrates the slit 36 of the inclined plate 9. The guide member 38 is fixed to the back surface of the inclined plate 39 via a fixing member 40 as shown in FIG.

In the area where the transport table 31 moves,
As shown in FIG. 1, an area facing the loading apparatus 2 includes
As shown in FIG. 0, a printed board guide member 45 for stably maintaining the posture of the printed board P when the printed board P is transported on the transport table 31 is attached to the front side of the inclined plate 9. Further, the printed board guide member 45 is provided on the mounting portion 34 of the transport table 31 on its upper side and in its length direction.
The groove 42 is formed so as to be movable.

The transfer table 31 reciprocates between the carry-in position of the carry-in device 2 and the transfer position of the second transfer device 6, and the reciprocating member 37 has an operating piece (see FIG. (Not shown). Then, by detecting the operating piece with a sensor such as a photo sensor, the above-mentioned respective positions of the transport table 31 can be known.

The first transfer device 5 includes a carry-in positioning mechanism 47 for positioning the carry-in position when the carry-in device 2 carries the printed circuit board P onto the carry table 31. It will be described with reference to FIG. As shown in FIG. 11, the loading positioning mechanism 47 is provided on a base plate 56 fixed to the back side of the inclined plate 9. That is, the carry-in positioning mechanism 47 includes a cam shaft 48 that is rotated by a motor (not shown) attached to the base plate 56, and the cam 4 fixed to the cam shaft 48.
The cam 49 rotates and the cam holder 50 linearly reciprocates in the direction in which the inclined plate 9 is arranged.

The tip of the cam holder 50 is connected to a movable member 52 via a connecting shaft 51. The movable member 52 is
It is configured to be rotatable about a shaft 53, and a leaf spring 54 is attached in the length direction thereof. The tip side of the leaf spring 54
A curved portion 55 having a curved shape is formed, and the curved portion 55 can protrude from an opening 57 provided in the inclined plate 9.

The curved portion 55 contacts the end surface of the printed circuit board P for rough positioning when the printed circuit board P is carried into the transfer table 31, and after the printed circuit board P is placed on the transfer table 31, , Printed circuit board P
Is pressed against the positioning member 35 at the other end, thereby positioning the printed circuit board P on the transfer table 31.

The position of the leaf spring 54 is detected by a sensor (not shown). Next, the configuration of the inspection device 3 will be described with reference to FIGS. 1, 6, 7, and 12. FIG. The inspection device 3 is configured to scan one inspection surface of the printed circuit board P transported by the transport table 31 of the first transport device 5 from a rear surface side of the inclined plate 9 with a line sensor such as a CCD line sensor as an imaging unit. Image data is obtained by shooting at 61, and the quality of the printed circuit board P is inspected (determined) by a computer (not shown) or the like based on the obtained image data.

For this purpose, as shown in FIGS. 1 and 7, the inclined plate 9 is provided with a photographing slit 62 in a direction perpendicular to the direction in which the printed circuit board P is conveyed. And
On the back side of the inclined plate 9, along the length direction of the photographing slit 62 and on both sides of the slit 62, a fluorescent lamp 6 is provided as illumination means for illuminating the inspection surface of the printed circuit board P.
3 and 63 and fluorescent lamps 64 and 64 are arranged, respectively. The fluorescent lamps 63, 63, as shown in FIG.
The fluorescent lamp holders 65, 65 fixed to the back side of the light emitting device are held up and down, and the fluorescent lamps 64, 64 are also held up and down by a fluorescent lamp holder (not shown).

As shown in FIG. 12, the photographing slit 62 has the smallest opening area at the front opening of the photographing slit 62, and the opening area gradually increases toward the rear opening. To the maximum at the rear opening,
The inclined surfaces 66 and 67 as shown are formed. With such a configuration, the light from the fluorescent lamps 63, 63 and the fluorescent lamps 64, 64 is efficiently guided to the opening on the front side of the photographing slit 62, and the inspection surface of the printed circuit board P is efficiently used. This is for the purpose of irradiation.

The angle α formed by the inclined surface 66 and the inclined surface 67 is determined by the fluorescent lamps 63 and 63 and the fluorescent lamp 64,
64, for example, and in the case shown in the figure, for example, about 140 degrees is optimal. As shown in FIG. 6, a line sensor 61 is provided at a predetermined position on the back side of the inclined plate 9 and opposite to a photographing slit 62 provided on the inclined plate 9. The line sensor 61 is provided with a fixture 76.
It is fixed at a predetermined position on the mounting frame 68 via the like. The inclination angle of the imaging surface of the line sensor 61 matches the inclination angle of the inclined plate 9.

The line sensor 61 and the inclined plate 9 are installed on a mounting frame 68, and the mounting frame 68 is mounted on the gantry 70 via, for example, four vibration-proof springs 69. Here, the four anti-vibration springs 69 constitute an anti-vibration mechanism. By providing the anti-vibration mechanism in this way,
Even if the gantry 70 shakes for some reason, the relative positional relationship between the line sensor 61 and the inclined plate 9 is kept constant. Therefore, the line sensor 61 can take an image of the printed circuit board P without being affected by vibration applied to the gantry 70 or the like.

When the photographing of the printed circuit board P is completed by the line sensor 61 of the inspection device 3, the first transfer device 5 pushes out the printed circuit board P on the transfer table 31 and drops it onto the second transfer device 6. 1, FIG. 6, FIG. 7, and FIG.
This will be described with reference to FIG. Extrusion mechanism 75
As shown in FIGS. 7 and 13, the extruding plate 77 is disposed on the back side of the inclined plate 9 and in the vicinity of the slit 76 provided in the inclined plate 9 and stands by in the slit 76. By pushing out from the slit 76 to the front side of the inclined plate 9, the push-out plate 77 pushes the printed circuit board P on the transfer table 31 to the upstream transfer section 7 of the second transfer device 6.

For this reason, the pushing mechanism 75 is installed on a hanging member 79 which is integral with the L-shaped member 78 fixed to the back surface of the inclined plate 9. That is, the pushing mechanism 75
Has a cam shaft 80 attached to a hanging member 79 and rotated by a motor (not shown), and a cam 81 fixed to the cam shaft 80. When the cam 81 rotates, the cam holder 82 It is configured to reciprocate linearly in a direction orthogonal to the direction.

The tip of the cam holder 82 is connected to a part of the pushing plate 77 via a connecting shaft 83. The pushing plate 77 is provided with a shaft 8 provided below the slit 76 of the inclined plate 9.
4 is rotatable. The extruding plate 77 extends in the length direction of the slit 76, and is configured such that the tip end stands by in the slit 76 as shown in FIG.

The extruding plate 77 normally stands by at the position indicated by the solid line in FIG. 13, and when the printed circuit board P is extruded, rotates around the shaft 84 from the standby position to the extruded position, and returns to the standby position again. For this reason, the standby state of the push plate 77 is detected by a sensor (not shown). Next, the configuration of the upstream transfer section 7 of the second transfer device 6 will be described with reference to FIGS. 1, 7, and 14. FIG.

[0051] As shown in FIG.
A metal endless belt 91 is provided for bringing the upper end side of the printed circuit board P into contact with the surface side of the inclined plate 9 and carrying the lower end side of the printed circuit board P in this state. Figure 1
As shown in FIG. 4, a guide 9 is provided on the side of the inclined plate 9 of the endless belt 91 along the length direction of the endless belt 91.
7 are provided. When the printed board P is transported by the endless belt 91, the guide guide 97 contacts the lower end of the printed board P to guide the transport, and at the same time, causes only the upper end of the printed board P to contact the inclined plate 9. Is to do so.

Further, as shown in FIG. 14, the endless belt 91 is disposed forward of the transfer position of the printed circuit board P on the transfer table 31 to receive the printed circuit board P dropped from the transfer table 31. I have. Also,
The transport surface of the endless belt 91 is located below the mounting surface of the transport table 31, as shown in FIG.

As shown in FIGS. 1 and 7, the endless belt 91 is driven by a driving roll 92 disposed on the surface of the inclined plate 9.
And a driven roll 92
Is rotated by a motor (not shown) so that the endless belt 91 rotates. Endless belt 91
As shown in FIG. 14, a belt holding member 95 for horizontally holding the conveyance surface of the endless belt 91 is arranged in the length direction of the endless belt 91.

The driven roll 93 is rotatably mounted on a roll mounting member 96 rotatably mounted on the inclined plate 9, and the roll mounting member 96 is attached to the endless belt 9.
A counterclockwise rotating force is constantly applied to tension 1. Next, the configuration of the downstream-side transport section 8 of the second transport device 6 will be described with reference to FIGS. 1, 15, and 16.

As shown in FIG. 16, the downstream transport section 8
A metal endless belt 101 is provided for bringing the upper end side of the printed circuit board P into contact with the front surface side of the inclined plate 10 and carrying the lower end side of the printed circuit board P in this state.
Here, similarly to the inclined plate 9, the inclined plate 10 is arranged in the transport direction of the printed circuit board P, and its plate surface is inclined at an inclination angle θ with respect to the reference plane.

Further, as shown in FIG.
A guide 102 is provided on the side of the inclined plate 10 along the length direction of the endless belt 101. The guide 102 is provided on the printed circuit board P by the endless belt 101.
When transporting the printed circuit board P, the lower end side of the printed circuit board P is contacted to guide the transport, and at the same time, only the upper end of the printed circuit board P is brought into contact with the inclined plate 10.

As shown in FIG. 15, when the printed circuit board P conveyed by the endless belt 101 is a non-defective product, the downstream conveyance unit 8 controls the non-defective product stopper 10 to restrict the conveyance.
3 and a defective product stopper 104 for controlling the conveyance of the printed circuit board P conveyed by the endless belt 101 when the product is defective.
Are carried out from the endless belt 101 by the carry-out device 4.

As shown in FIGS. 1 and 15, the endless belt 101 is stretched between a driving roll 105 and a driven roll 106 disposed on the surface of the inclined plate 10, and the driving roll 105 is driven by a motor 107. The rotation causes the endless belt 101 to rotate. As shown in FIG. 16, the drive roll 105 is rotatably supported by a bearing 108 attached to the inclined plate 10, and is connected to a rotation shaft of a motor 107.

Inside the endless belt 101, a belt holding member (not shown) for horizontally holding the conveying surface of the endless belt 101 is arranged in the length direction of the endless belt 101. An outward force is always applied to the driven roll 106 by appropriate means to tension the endless belt 101. Non-defective stopper 103
In a state where the leading end side advances from the slit 109 provided in the inclined plate 10 to the front side of the inclined plate 10, the conveyance of the non-defective printed circuit board P conveyed by the endless belt 101 is regulated, and the printed circuit board P In such a case, the printed circuit board P of the defective product is retreated to the rear side of the inclined plate 10 and can pass to the downstream side. The transport of the passed defective printed circuit board P is regulated by a defective product stopper 104 fixed to the inclined plate 10 above the endless belt 101 on the downstream side.

Good product stopper 103 and defective product stopper 10
For example, a gel-like shock absorbing tape is affixed to the collision surface 4 as a means for absorbing the impact at the time of the collision and suppressing the rebound of the printed circuit board P on the collision surface. On the inclined plate 10 near the non-defective product stopper 103, a seating sensor 110 for detecting that the non-defective product printed circuit board P has been stopped by the non-defective product stopper 103 being restricted from being conveyed.
Is attached. Also, the defective stopper 104
A seating sensor 111 for detecting that the defective printed circuit board P has been transported by the defective product stopper 104 and stopped has been attached to the inclined plate 10 in the vicinity of.

Next, the structure of the unloading device 4 will be described with reference to FIG.
This will be described with reference to FIGS. As shown in FIG. 1, the unloading device 4 is disposed along the downstream transport section 8 of the second transport device, and the non-defective product loading table 116 for loading non-defective printed circuit boards P whose transport is regulated by the non-defective product stopper 103. And a defective product loading table 117 for loading a defective printed circuit board P whose conveyance is regulated by the defective product stopper 104.
At 17, the printed circuit board P is selectively transferred according to a non-defective product or a defective product.

For this reason, the non-defective product loading table 116
As shown in FIG. 15, a moving member 118 is fixed on the lower surface side, and the moving member 118 is guided by a guide 120 fixed on a gantry 119, and is in a direction orthogonal to the transport direction of the downstream transport unit 8. You can move to.
The non-defective product loading table 116 is configured such that the leading end side can pass through the inside of the endless belt 101 and can pass through the opening 123 opened in the inclined plate 10.

Further, on the frame 119 on the lower surface side of the non-defective product loading table 116, there is provided a contact member 12 for contacting the lower surface of the non-defective product loading table 116 and preventing it from bending.
Reference numerals 1 and 122 are arranged in parallel on the left and right sides of the guide 120. The moving member 118 is connected to a shaft of a motor 126 via a rack 124 and a pinion 125, and the moving member 118 is caused to linearly reciprocate by rotation of the motor 126.

Next, an extruding mechanism 127 for extruding the non-defective printed circuit board P on the endless belt 101 onto the non-defective product loading table 116 is arranged on the back side of the inclined plate 10. This configuration will be described. This pushing mechanism 1
27, an opening 128 is provided in the inclined plate 10 above the endless belt 101 as shown in FIG.
When the extruding portion 129 moves forward, the non-defective printed circuit board P on the endless belt 101 is transferred onto the non-defective product loading table 116. Then, after the transfer, the push-out portion 129 has its tip at the opening 12.
8, and the non-defective product loading table 116 is retracted by the thickness of the printed circuit board P.

As shown in FIG. 15, the extruded portion 129 has a flat plate 130 attached to the tip end thereof.
A plurality of pushers 131 that press the plate surface of the printed circuit board P in the length direction of 0 are attached. Pusher 131
Is configured to be stretchable (bellows-like) by, for example, rubber or the like. As shown in FIG. 15, a moving member 138 is fixed to the lower surface side of the defective product loading table 117,
The moving member 138 is guided by a guide 140 fixed on the gantry 119, and can move in a direction orthogonal to the transport direction of the downstream transport unit 8. The end of the defective product loading table 117 is the endless belt 1.
01 as well as through an opening 123 formed in the inclined plate 10.

Further, on the frame 119 on the lower surface side of the non-defective product loading table 117, there is provided a contact member 14 for contacting the lower surface of the defective product loading table 117 and preventing it from bending.
Reference numerals 1 and 142 are arranged in parallel on the left and right sides of the guide 140. The moving member 138 is connected to a shaft of a motor 146 via a rack 144 and a pinion 145, and causes the moving member 138 to reciprocate linearly by rotation of the motor 146.

Next, an extruding mechanism 147 for extruding the defective printed circuit board P on the endless belt 101 onto the defective article stacking table 117 is arranged on the back side of the inclined plate 10. This configuration will be described. This pushing mechanism 147 has an opening 148 in the inclined plate 10 above the endless belt 101, as shown in FIGS.
When the pushing portion 149 advances from the opening 148, the defective printed circuit board P on the endless belt 101 is moved.
Is transferred onto the defective product loading table 117. Then, after the transfer, the pushing section 149 is
The tip is retracted until it is positioned in the opening 148, and the defective product loading table 117 is retracted by the thickness of the printed circuit board P.

As shown in FIG. 15, the extruded portion 149 has a flat plate 150 attached to the tip end thereof.
A plurality of pushers 151 that press the plate surface of the printed circuit board P in the length direction of the print board P are attached. Pusher 151
Are configured similarly to the pusher 131. As shown in FIG. 16, an inclined support plate 153 for supporting the printed circuit board P is provided on the defective product loading table 117, and the leading end of the printed circuit board P is detected on the gantry 119. Sensor 154 is provided. The same applies to the non-defective product loading table 116.

Next, the operation of the embodiment of the printed circuit board inspecting apparatus having the above-described configuration will be described with reference to the drawings. As shown in FIG. 3, the printed circuit board P to be inspected is aligned vertically in the printed circuit board aligning section 11 of the carry-in device 2. At this time, the printed circuit board P is in a state inclined at, for example, 80 degrees with respect to the reference plane. At this time, since the inclined plate 14 is inclined, the printed circuit board P is in a state of being overlapped by its own weight, and its position is determined by the reference member 20.

Next, the aligned printed circuit board P is
The printed circuit board P is pushed forward by the pushing plate 19 of the feed mechanism 16, and the leading printed circuit board P stands by at the discharge port of the printed circuit board alignment unit 11. At this time, the transfer table 31 of the first transfer device 1 is shown in FIGS.
As shown in (1), the printer stands by at the carry-in position. At this time, the movable member 52 of the carry-in positioning mechanism 47 is at the position indicated by the broken line in FIG.
5 is also at the position of the broken line. Thereby, the transport table 31
Are ready to accept the printed circuit board P.

Next, the vacuum pad moving mechanism 22 shown in FIG.
, The vacuum pad 21 moves forward, and the printed board alignment unit 1
When the plate surface of one printed circuit board P waiting at one discharge port is sucked, the vacuum pad 21 starts to retreat. When the entire surface of the printed board P hits the inclined plate 9 with the retreat of the vacuum pad 21, the vacuum pad 21 further retreats, causing a vacuum breakage. Fall on.

When the printed circuit board P falls on the transport table 31, the inclined plate 9 is inclined, so that it falls along the surface of the inclined plate 9. In addition, transport table 3
When the printed circuit board P falls on the transfer table 1, the displacement of the printed circuit board P in the length direction of the transfer table 31 is regulated by the positioning member 35 provided on the transfer table 31 and the curved portion 55 of the leaf spring 54. The displacement of the 31 in the width direction is regulated by the printed board guide member 45 (see FIGS. 10 and 11). For this reason, the printed circuit board P
When the fall is completed, the vertical direction is positioned on the transport table 31 in a state where the entire plate surface is in contact with the inclined plate 9.

Next, the movable member 5 of the carry-in positioning mechanism 47
2 further rotates clockwise about the shaft 53 from the position indicated by the broken line in FIG. 11, and accordingly, the curved portion 55 of the leaf spring 54 also rotates in the same direction. Therefore, the curved portion 55
Strikes the end surface of the printed circuit board P, and the other end surface of the printed circuit board P is pressed against the positioning member 35, so that the left and right directions thereof are positioned on the transport table 31. When the positioning is completed, the movable member 5 of the loading positioning mechanism 47
2 returns to the solid line position in FIG. 11, and accordingly, the curved portion 55 of the leaf spring 54 also becomes the solid line position.

Here, the curved portion 55 of the leaf spring 54 hits the printed circuit board P and presses the end surface thereof.
Is pressed back because of its elasticity, the end face of the printed circuit board P is not stressed to a certain degree or more, and the printed circuit board P is not damaged. Next, when the transport table 31 starts transporting the printed circuit board P, the transport table 31 moves at a constant speed, so that the printed circuit board P on the transport table 31 is inspected at a constant speed while being pressed by the positioning member 35. It is transported to the device 3.

At this time, the printed circuit board P is in a state where the entire plate surface is along the inclined plate 9 and the lower end surface is placed on the transfer table 31. Therefore, the gravitational force (weight) G acting on the printed circuit board P is decomposed into a force G1 for pressing the inclined plate 9 and a force G2 for pressing the transport table 31, as shown in FIG. The force G <b> 1 pushing the inclined plate 9 is dispersed throughout the inclined plate 9, and acts as a force that the printed board P always contacts the inclined plate 9 during the conveyance of the printed board P. On the other hand, the force G2 pressing the transfer table 31 is a force approximating the gravity G, which concentrates on the lower end surface of the printed circuit board P
It acts as a force for positioning and fixing the printed circuit board P on the transport table 31.

Therefore, even if there is no mechanism (means) for fixing the printed circuit board P to the transfer table 31, the printed circuit board P on the transfer table 31 does not rattle.
It is transported stably and smoothly at a constant speed. Printed circuit board P
When the camera passes through the photographing slit 62, the printed circuit board P
Is inspected by the line sensor 61, and image data corresponding to the appearance thereof is obtained. This image data is
The data is input by a computer (not shown), whereby the computer determines the quality of the printed circuit board P and outputs the determination result.

Thereafter, the line sensor 6 on the printed circuit board P
When the photographing by 1 is completed and the transport table 31 reaches the delivery position of the printed circuit board P (the position indicated by the one-dot chain line in FIG. 1), it stops moving. Next, as shown in FIG. 14, since the pushing plate 77 of the pushing mechanism 75 moves forward, the printed board P on the carrying table 31 is pushed by the pushing plate 77 and the second carrying device 6 is pushed from the carrying table 31. Falls on the endless belt 91. When the drop is completed, the transport table 31 immediately returns to the original carry-in position.

Here, the discharge side of the transport table 31 has an inclined surface 43 that is gradually inclined toward the endless belt 91. Therefore, when the printed board P on the transport table 31 falls onto the endless belt 91, the drop is performed smoothly and the printed board P is not damaged. Thereafter, the transport of the printed circuit board P dropped on the endless belt 91 is started. Since the conveyance guide 97 is provided in the length direction of the endless belt 91, the printed board P
While the lower end surface thereof rests on the endless belt 91, and only the upper end thereof is in contact with the inclined plate 9, the sheet is guided and conveyed by the conveyance guide 97.

When the transfer of the printed circuit board P by the endless belt 91 is completed, the transfer by the endless belt 101 is started. When transported by the endless belt 101, the printed circuit board P is guided and transported by the guide 102 while the lower end surface thereof rests on the endless belt 101 and only the upper end thereof is in contact with the inclined plate 10. . When the printed circuit board P is a non-defective product, the non-defective product stopper 103 is waiting above the endless belt 101 with the non-defective product stopper 103 advanced from the slit 109, and is stopped by the non-defective product stopper 109. When the stop of the non-defective printed circuit board P is detected by the seating sensor 110, the push-out section 129 of the push-out mechanism 127 moves forward. Therefore, the non-defective printed circuit board P is pushed out onto the non-defective product loading table 116 by the pusher 131 and is vertically aligned. When the extrusion is completed, the pusher 131 is retracted, and the motor 126 is driven to retract the non-defective product loading table 116 by one printed circuit board P.

On the other hand, when the printed circuit board P is defective, the non-defective printed circuit board P is transported to the defective product stopper 104 because the non-defective product stopper 103 is retracted to the back side of the inclined plate 10. , Stop there. When the stop of the defective printed circuit board P is detected by the seating sensor 111, the pushing unit 1 of the pushing mechanism 147
49 moves forward. Therefore, the defective printed circuit board P
Are pushed out onto the defective product loading table 117 by the pusher 151 and are vertically aligned. When the pushing is completed, the pusher 151 is retracted, and the motor 146 is moved.
Drives the defective product loading table 117 to the printed circuit board P.
Retreats by one.

As described above, according to the printed board inspection apparatus according to this embodiment, the first transport device 5 sets the entire board surface of the printed board P along the inclined plate 9, In this state, the printed circuit board P is transferred to the transfer table 3.
1 and transported. Further, the angle formed between the transfer surface of the transfer table 31 and the plate surface of the inclined plate 9 is set to be substantially a right angle.

Therefore, even if there is no mechanism (means) for fixing the printed circuit board P to the transfer table 31, the printed circuit board P on the transfer table 31 does not rattle.
It is transported stably and smoothly at a constant speed. Therefore, when the printed board P is imaged by the line sensor 61, the printed board P can be transported in a very stable state,
An accurate image of the appearance of the printed circuit board P can be obtained, and the inspection accuracy can be improved.

[0083]

As described above, claims 1 to 5 are described.
According to the inventions described in the above, when the printed circuit board is imaged by the imaging means, the printed circuit board can be transported in a very stable state, and an accurate image of the appearance of the printed circuit board can be obtained. It becomes possible.

According to the third aspect of the present invention, the relative positional relationship between the imaging means and the inclined member is maintained constant even if the gantry shakes for some reason. Instead, an image of a printed circuit board can be taken. According to the invention described in claim 6, even without a mechanism for fixing the printed circuit board P to the transfer table, the printed circuit board on the transfer table is stably and smoothly transferred at a constant speed without rattling. You. Therefore, when the printed circuit board is imaged by the imaging means, the printed circuit board can be transported in a very stable state, and an accurate image of the appearance of the printed circuit board can be obtained.

According to the seventh aspect of the present invention, the printed circuit board for which imaging has been completed by the imaging means can be transported to the carry-out device in a relatively stable state. According to the invention described in claim 8, when the printed circuit board is carried in by the carrying-in device on the carrying table, accurate positioning can be performed. According to the ninth aspect of the invention, when the printed circuit board on the transfer table is transferred from the transfer table to the endless belt of the second transfer device, the transfer can be performed smoothly and stably, and the printed circuit board is damaged. Nothing.

According to the tenth aspect of the present invention, when the printed circuit board is transported on an endless belt, the printed circuit board is transported in a state where the partial contact between the printed board and the inclined plate is kept constant. And can contribute to the stabilization of the conveyance. According to the eleventh aspect, the printed circuit boards can be reliably and quickly transferred one by one onto the transfer table of the first transfer device.

According to the twelfth aspect of the present invention, the printed circuit board conveyed by the second conveying device can be selectively transferred to the non-defective product loading table or the defective product loading table according to the quality of the printed circuit board.

[Brief description of the drawings]

FIG. 1 is a plan view (arrangement diagram) showing a schematic configuration of an embodiment of a printed board inspection machine of the present invention.

FIG. 2 is a perspective view showing the appearance of an embodiment of the printed board inspection machine of the present invention.

FIG. 3 is a side view of a printed circuit board alignment unit in the loading device.

FIG. 4 is a plan view of the printed circuit board alignment unit excluding a feed mechanism.

FIG. 5 is a side view of a printed board transfer unit in the loading device.

FIG. 6 is a side view showing a configuration of an inclined plate and components related to the inclined plate.

FIG. 7 is a front view showing a configuration of an inclined plate and components related to the inclined plate.

FIGS. 8A and 8B are views showing a transport table, wherein FIG. 8A is a front view thereof and FIG. 8B is a side view thereof.

9A and 9B are views showing a positioning member, wherein FIG. 9A is a front view thereof, and FIG. 9B is a side view thereof.

FIG. 10 is a side view showing the configuration of the first transport device.

FIG. 11 is a plan view showing a configuration of a carry-in positioning mechanism.

FIG. 12 is a plan view showing an example of the arrangement of a photographing slit and a fluorescent lamp on an inclined plate.

FIG. 13 is a side view showing the configuration of the pushing mechanism.

FIG. 14 is a side view illustrating a configuration of an upstream transfer unit of the second transfer device.

FIG. 15 is a front view showing a configuration of an inclined plate, a carry-out device, and the like.

FIG. 16 is a right side view of FIG.

FIG. 17 is a diagram illustrating conveyance of a printed circuit board.

[Explanation of symbols]

 P Printed circuit board θ Inclination angle of inclined plate 1 Transport device 2 Carry-in device 3 Inspection device 4 Unloading device 5 First transport device 6 Second transport device 7 Upstream transport unit 8 Downstream transport unit 9, 10 Inclination plate (inclined member) Reference Signs List 11 printed board alignment unit 12 printed board transfer unit 14 inclined plate 16 feed mechanism 21 vacuum pad 31 transfer table 35 positioning member 43 inclined surface 47 carry-in positioning mechanism 54 leaf spring 55 curved part 61 line sensor (imaging means) 62 imaging slit 75 Pushing mechanism 91, 101 Endless belt 103 Good product stopper 104 Defective product stopper 116 Good product loading table 117 Defective product loading table 127, 147 Pushing mechanism

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 2G051 AA65 BA01 CA03 CB01 CC07 DA01 DA06 DA13

Claims (12)

[Claims] 1. A printed circuit board inspection machine for taking an image of an inspection surface of the printed circuit board by an image pickup means while the printed circuit board is being transported by a transport device, and inspecting the appearance of the printed circuit board based on the captured image. The transport device includes an inclined member that is arranged in a transport direction of the printed circuit board and has an inclined surface that is inclined at a predetermined angle with respect to a reference horizontal plane. The printed circuit board is transported in a state where the whole is along the inclined surface, and after the end of the imaging, the printed substrate is transported by guiding the upper end of the printed substrate to the inclined surface. Printed circuit board inspection machine characterized by the following. 2. A photographing slit which is provided on a part of a region corresponding to a conveying path when the photographing means photographs the printed circuit board, wherein the photographing means comprises the photographing slit. 2. The printed circuit board inspection apparatus according to claim 1, wherein an image of the inspection surface of the printed circuit board is taken through the device. 3. The printed circuit board inspection apparatus according to claim 1, wherein the imaging unit and the inclined member are installed on a gantry via an anti-vibration mechanism. 4. The apparatus according to claim 1, further comprising a carry-in device for carrying the printed circuit board into and out of the carry device, and a carry-out device for carrying out the printed circuit board from the carry device. 3. The printed circuit board inspection machine according to any one of 3. 5. The image forming apparatus according to claim 1, wherein the conveying device sets the entire surface of the printed circuit board along the inclined surface of the inclined member so that the image is captured by the imaging unit. A first transport device for transporting the printed board at a constant speed on a transport table, and receiving the printed board, for which imaging has been completed, from the first transport device; The inspection apparatus for printed circuit boards according to any one of claims 1 to 4, further comprising: a second transport device that transports the printed circuit board by an endless belt. 6. The first transport device, wherein the first transport device is disposed in a transport direction of the printed board, and is inclined at a predetermined angle with respect to a reference horizontal plane; A transfer table for carrying the printed circuit board on the transfer table in this state, and reciprocating the transfer table between a loading position by the loading device and a transfer position of the second transport device, When the transport table transports the printed circuit board, the transport table includes a reciprocating mechanism that operates the transport table at a predetermined constant speed, and the angle between the transport surface of the transport table and the plate surface of the inclined plate is substantially The printed circuit board inspection machine according to claim 5, wherein the inspection device is at a right angle. 7. An inclined plate, which is arranged in a direction in which the printed circuit board is conveyed, and is inclined at a predetermined angle with respect to a reference horizontal plane, wherein an upper end of the printed circuit board is in contact with the inclined plate. A metal endless belt for carrying the printed circuit board in this state, and a drive mechanism for driving the endless belt to rotate, and forming a transfer surface of the endless belt and a plate surface of the inclined plate. The printed board inspection apparatus according to claim 5, wherein the angle is substantially a right angle. 8. The first transfer device further includes a positioning unit that positions the printed board on the transfer table when the printed board is loaded on the transfer table by the loading device. The means comprises a positioning member provided on the transfer table, and a positioning mechanism having a positioning piece that moves to a predetermined position on the transfer table at the time of the positioning. 8. A printed circuit board inspection apparatus according to claim 6, wherein a constant pressing force is applied to the printed circuit board. 9. The transfer table of the first transfer device, wherein an end on the discharge side is gradually lowered toward the width direction of the transfer table.
An inspection machine for a printed circuit board according to claim 8. 10. A guide member for guiding a lower end side of the printed circuit board is provided along the inclined plate side of the endless belt of the second transporting device. The printed circuit board inspection machine according to any one of the above. 11. The loading device is disposed along the first transport device, the first transport device side is inclined in a high state, and a plurality of the printed circuit boards are vertically overlapped and aligned on a surface thereof. An alignment plate, a feed mechanism for feeding the printed board to be aligned toward the first transport device, and the printed board sent by the feed mechanism on a transport table of the first transport device with a vacuum pad. The inspection apparatus for printed circuit boards according to claim 5, further comprising: a transfer mechanism configured to perform suction and transfer. 12. The unloading device, which is disposed along the second transport device and is configured to load a non-defective printed circuit board on which a non-defective product printed circuit board is mounted. A defective product loading table to be loaded, and transfer means for selectively transferring the printed circuit board to the non-defective product loading table and the defective product loading table according to the quality of the printed circuit board conveyed by the second transport device. The printed board inspection apparatus according to any one of claims 5 to 11, further comprising: