JPH08122390A - Automatic inspection apparatus - Google Patents

Abstract

PURPOSE: To obtain an automatic inspection apparatus excellent in workability in which useless work and place for stocking printed boards while stacking can be eliminated during the process after splitting the board before ending the inspection. CONSTITUTION: A split mechanism comprises means 10 for splitting a printed board A into a plurality of printed boards (a), and a section 13 for carrying out the split boards (a) An inspection mechanism comprises an inspecting section B for deciding whether the printed board (a) is acceptable, a section for feeding the printed board to an inspecting position at the inspecting section B, and a section for sorting the printed boards (a) depending on the inspection results. A passage 7 for carrying the printed board (a) is provided at the printed board feeding section in the inspection mechanism and the carrying passage 7 is provided with a section 7a for carrying in the printed board (a) being carried out sequentially from the carry-out section 13 in the splitting mechanism.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic inspection device for inspecting whether a printed circuit board is nondefective.

[0002]

2. Description of the Related Art Conventionally, an automatic inspection apparatus includes a printed circuit board supply section for supplying a printed circuit board to a predetermined inspection position, an inspection section for inspecting the printed circuit board supplied from the printed circuit board supply section to a predetermined inspection position, The printed circuit board inspected by the inspection unit is selected according to the inspection result. Then, the printed circuit board supply unit takes out the printed circuit boards stacked on the mounting table one by one and supplies them to the inspection position of the inspection unit.

As shown in FIG. 6, a printed circuit board a to be placed on a mounting table is divided into a plurality of large printed circuit boards A for division, and printed wiring is provided for each area. It is made by dividing the wired area with a dividing device.

Since the dividing device for dividing the dividing printed circuit board A may generate fine dust, dust, etc. at the time of dividing, the inspection of the printed circuit board a is performed in another room (inspection room). It was normal.

For this reason, the printed circuit boards a divided by the dividing device are stored in a warehouse or the like in a stacked state until they are carried to the inspection room and inspected.

Incidentally, a printed circuit board which is determined to be a defective product by the inspection of the automatic inspection device is often determined to be a non-defective product when inspected again after cleaning. As a result of various experiments conducted by the inventor, he is convinced that the cause is as follows. Fine dust due to the division of the dividing device,
Scratches are generated, and the dust and dust adhere to the surface of the printed circuit board. When the printed circuit boards are stacked and stored in this state, the attached dust and dirt cling to the printed circuit board, and in the end, they enter the insertion holes for mounting.

If the printed circuit board is left for a long time after the division, an oxide film is formed on the exposed portion of the printed wiring. This causes an error in the electrical contact between the contact of the inspection device and the printed circuit board to be inspected, causing the automatic inspection device to make a wrong decision.

[0008]

As described above, the work from the division of the dividing printed circuit board to the inspection of the divided printed circuit boards includes a dividing step of dividing the dividing printed circuit board by a dividing device and a printing process. It is divided into an inspection process of inspecting a substrate by an inspection device, and each substrate is handled as a separate work. The printed circuit board divided by the dividing device is left for a long time before being conveyed to the inspection room and inspected.

On the surface of the printed circuit board which has been left for a long period of time, dirt generated during division is stuck, or an oxide film or the like is formed on the wiring portion. Due to this, the inspection device malfunctioned and the inspection rate was significantly reduced.

In addition, in the process from the division to the end of the inspection, it is necessary to stack and store the printed circuit boards in the middle of the process. .

The present invention has been made in view of the above problems, and lowers the inspection rate caused by leaving the printed circuit board for a long time in the steps from the division of the printed circuit board to the completion of the inspection, Another object of the present invention is to provide an automatic inspection device having extremely good workability by preventing a decrease in workability caused by stacking and storing printed circuit boards.

[0012]

Means to be adopted by the present invention for achieving the above object are a dividing means for dividing a dividing printed board into a plurality of printed boards, and a printed board divided by the dividing means. A dividing mechanism is provided with a carry-out section for carrying out, and an inspection section for inspecting whether the printed board is a good product, a printed board supply section for supplying the printed board to an inspection position of the inspection section, and an inspection section An inspection mechanism is formed with a sorting unit that sorts the printed circuit boards that have been inspected according to the inspection result, the inspection mechanism is provided with a conveyance path that conveys the printed circuit board to the printed circuit board supply unit, and the discharging unit of the dividing mechanism is provided. The carrying path is provided with a carry-in section for carrying in the printed boards that are successively carried out into the carrying path.

[0013]

According to the automatic inspection apparatus of the present invention, the dividing printed board is divided into the printed boards by the dividing means. The divided printed board is carried out by the carry-out section and carried into the transport path by the carry-in section. Then, the printed circuit board carried into the transport path is sent to the printed circuit board supply unit along the transport path. The printed board supply unit sends the sent printed boards to the inspection position of the inspection unit one by one,
The inspection unit inspects the printed circuit board at this inspection position.
Further, the inspected printed circuit board is sorted by the sorting unit according to the inspection result.

That is, the automatic inspection apparatus can perform the dividing mechanism and the inspection mechanism in a continuous process.

[0015]

The present invention will be described below with reference to the drawings. FIG.
Is a schematic side view showing an embodiment of the inspection mechanism of the automatic inspection device, FIG. 2 is a schematic plan view showing an embodiment of the inspection mechanism of the automatic inspection device, and FIG. 3 is a main part showing an embodiment of the automatic inspection device. FIG. 4 is an enlarged view, and FIG. 4 is a use mode diagram showing a use example of the automatic inspection device
FIG. 5 is an enlarged view of a main part for explaining the operation of the positioning plate, and FIG. 6 is a perspective view showing a dividing printed board.

The automatic inspection device is composed of a dividing mechanism and an inspection mechanism. First, the inspection mechanism will be described. The inspection mechanism includes a control unit 1, a printed circuit board supply unit 2, an inspection press unit 3, an analysis unit 4, a defective substrate stock unit 5, a non-defective substrate stock unit 6, and a conveyance path 7. .
Incidentally, reference numeral B in the drawing denotes an inspection unit, which is composed of an inspection press unit 3 and an analysis unit 4.

The control unit 1 is composed of a sequencer or the like, and is provided between a dividing mechanism for dividing / carrying out the divided printed circuit board A into each unit printed circuit board a and an inspection mechanism for inspecting the printed circuit board a. This is the part that controls the timing of mechanical movement as a whole.

The printed circuit board supply section 2 is a section for sending the printed circuit board a conveyed from the conveyance path 7 to the inspection position of the inspection press section 3, and the conveyance rail 2b and this conveyance rail 2
It is composed of a holding unit 2a that holds and conveys the printed circuit board a on b.

The inspection press unit 3 is a printed circuit board supply unit 2
The printed circuit board a conveyed from the press is pressed to electrically contact the jig probe pins 3b of the electric inspection jig 3a with the printed circuit board a.

The analysis unit 4 inspects the continuity, insulation, and capacitance of the wiring printed on the printed circuit board a based on the data sent from the inspection press unit 3, and the printed circuit board a
Is a part for determining whether the printed circuit board a is a good product or the defective printed circuit board a.

The defective board stock section 5 is provided with the printed board a when the analyzing section 4 determines that the board is defective.
Is the part to stock. On the other hand, the non-defective board stock section 6 is a section for stocking the non-defective printed circuit board a when the analysis section 4 determines that the non-defective board is a non-defective article.

The conveyance path 7 is the central portion of the present invention, and is a portion for feeding the printed circuit board a divided and conveyed by the dividing device to the printed circuit board supply section 2.

2 and 3, the conveying path 7 is composed of a carry-in section 7a and a belt conveying section 7m.

The carry-in section 7a is a part for carrying in the printed circuit board a, which is divided and carried by the dividing mechanism, into the carrying path 7 at a predetermined position on one end side of the carrying path 7, and the carrying-in rail 7a.
j, a transportation motor (transportation actuator) 7e, a support transmission portion 7f, a positioning plate 7d, a first substrate detection sensor 7c, a positioning sensor 7g, and a sensor fixing portion 7h.
It consists of and.

The carry-in rail 7j is the first carry-in rail 7j.
a and a second carrying-in rail 7jb,
It is provided at both ends of the wall surface forming the carry-in port 7i so as to be substantially orthogonal to the carrying direction of the carrying path 7. The first carry-in rail 7ja is provided inside. Meanwhile, the second
The carry-in rail 7jb is provided outside the first carry-in rail 7ja.

Further, a transport motor (transport actuator) 7
e is provided on the second carry-in rail 7jb, and
The support transmission unit 7f is provided at one end of the carry motor 7e. The supporting portion 7f is slidably provided along the first transport rail 7ja.

The positioning plate 7d is formed by bending a long side of a rectangular flat plate upward so that its cross section is substantially L-shaped. Both ends thereof are supported by the supporting portion transmitting portion 7f. When the transport motor 7e that receives a signal from the control unit 1 is driven, the positioning plate 7d moves through the support transmission unit 7f in a direction substantially orthogonal to (forward and backward) the transport direction of the transport path 7.

The first substrate detection sensor 7c has a carry-in port 7i.
And a reflective interrupter capable of detecting a change in reflected light. Printed circuit board a is first
When it passes over the substrate detection sensor 7c and passes through the carry-in port 7i, this is detected and a signal is sent to the control unit 1. The control unit 1 receiving this signal controls each unit.

The positioning sensor 7g is composed of a micro switch, and is mounted at a desired position on the first carry-in rail 7ja via a sensor fixing portion 7h.
A micro switch is used as the positioning sensor 7g, but the one used is not limited to the micro switch. For example, a sensor having a reflective interrupter capable of detecting a change in reflected light is used. You may.

Further, the moving section of the positioning plate 7d is determined by the position where the positioning sensor 7g is provided,
The moving positioning plate 7d sends a signal to the control unit 1 by pressing the switch portion of the positioning sensor 7g, and the control unit 1 receiving this signal drives the carry motor (transfer actuator) 7e in the reverse direction. Then, the positioning plate 7d is returned to the position of the carry-in port 7i.

The belt conveyor unit 7m includes a belt conveyor including a conveyor belt 7n and a conveyor drive motor (not shown),
It is composed of a second substrate detection sensor 7o and a standby shutter 7p. Then, in FIG. 2, the placed printed circuit board a is conveyed from one end side on the left side to the other end side on the right side.

The second substrate detection sensor 7o is provided at the other end of the belt conveying section 7m. When the printed circuit board a passes over the second substrate detection sensor 7o, the position of the printed circuit board a is changed. This is a part for notifying the control unit 1. And, like the first substrate detection sensor 7c, it is composed of a reflective interrupter capable of detecting a change in reflected light.

As shown in FIG. 1, the standby shutter 7p is composed of a closing plate 7q and a shutter solenoid 7r. When the printed circuit board a is in the inspection press section 3, the standby shutter 7p is The other end of the conveyor belt 7n is closed to prevent the printed circuit board a from being conveyed into the inspection press section 3. Then, when the printed circuit board a in the inspection press section 3 proceeds to the next step, the standby shutter 7p opens,
The closed state is released, and the waiting printed circuit board a is carried into the inspection press section 3.

The inspection mechanism configured as described above is used by being connected to a dividing mechanism for dividing / carrying out the divided printed board A into each unit board.

An example of the dividing mechanism will be described below with reference to FIG. The dividing mechanism includes a dividing mechanism control unit 8, a dividing printed board supply unit 9, a punching press unit 10, and a substrate receiving unit 1.
1, a cleaner unit 12, and a substrate unloading unit 13.

The dividing mechanism control section 8 is a section for controlling the mechanical movement of the dividing mechanism as a whole by a sequencer or the like.

The divided printed circuit board supply section 9 comprises a stock section 9a and an arm hand section 9b.
The arm hand 9b holds the divisional printed circuit boards A stacked on the stock portion 9a by the division holding portion (not shown) provided near the tip, and sets them on the press table (not shown) of the punching press portion 10. It is a part.

The punching press section 10 is a section for dividing the divisional printed circuit board A set on the press table. The punching die (not shown) set in advance and the divisional printed circuit board A are set. It is composed of a press table that is used.

The board receiving section 11 is a section for receiving the printed board a divided in the punching press section 10 and sending it to the next step, and a receiving section (not shown) for receiving the printed board a.
And a sending section (not shown) for sending the printed circuit board a received by the receiving section to the cleaner section 12.

The cleaner portion 12 is a portion for removing static electricity of the printed board a and for removing dust and dust adhering to the surface of the printed board a.

The board carry-out section 13 is a belt conveyor, and is composed of a motor 13a and a belt 13b, and is a section for sending the printed board a to the carry-in entrance 7i of the carry-in section 7a.

The automatic inspection apparatus having the above-mentioned dividing mechanism will be further described with reference to FIG. 4. The dividing printed boards A stacked on the stock portion 9a are punched and pressed by the arm hand portion 9b.
And is set on the press table (punching position).

The dividing printed circuit board A set on the press table in the punching press section 10 is sequentially punched by a punching die (not shown) to be divided into three rectangular printed circuit boards a.

The divided printed circuit boards a are received by the substrate receiving section 11 one by one and sent to the cleaner section 12.

As for the printed circuit board a of the cleaner section 12, static electricity is removed by the static elimination section, and dust and dirt adhering to the surface of the printed circuit board are removed by the roller section.

The printed circuit board a sent from the cleaner section 12 to the board unloading section 13 is conveyed in the direction of the carry-in port 7i by the belt conveyor constituting the board unloading section 13. Then, one end of the printed circuit board a has a first substrate detection sensor 7
When reaching the position c, the first substrate detection sensor 7c detects this and sends a signal to the controller 1 to stop the belt conveyor 7m. In this stopped state, the substrate carry-out section 13 continues to carry out the printed circuit board a, the printed circuit board a passes over the first substrate detection sensor 7c, and reaches a predetermined position on the positioning plate 7d (see FIG. 5). Be delivered to.

When the printed board a is carried out to a predetermined position (see FIG. 5) on the positioning plate 7 d, the first board detection sensor 7 c detects that the printed board a has passed, and the control unit 1 Send a signal to. Receiving this signal, the controller 1 drives the carry motor 7e. Transport motor 7e
The positioning plate 7d moves in a direction substantially perpendicular to the conveyance direction of the belt conveyance section 7m (from the carry-in port 7i to the back side) while the printed circuit board a is placed by the driving of. When it continues to move, the positioning sensor 7g fixed at a predetermined position detects this and outputs a signal to the control unit 1. Receiving this signal, the control unit 1 stops the positioning plate 7d and returns it to the initial position, and carries the printed circuit board a into the transport path 7.

When the printed circuit board a is loaded into the transport path 7, the belt transport unit 7 m transports the printed circuit board a toward the inspection press unit 3. Printed circuit board a being transported
When trying to pass over the second substrate detection sensor 7o, the second substrate detection sensor 7o detects the printed circuit board a and sends this detection signal to the control unit 1. When the inspection press section 3 already has the printed circuit board a, the control section 1 receiving this detection signal closes the standby shutter 7p to close the end of the conveyance path 7 and stops the belt conveyance section 7m. Let As a result, the printed circuit board a enters a standby state. On the other hand, the printed circuit board a
If there is not, the control unit 1 opens the standby shutter 7p to move the printed circuit board a to the supply rail 2 of the printed circuit board supply unit 2.
Transport to one end of b.

Supply rail 2 of printed circuit board supply unit 2
The printed board a conveyed to one end of b is held by the holder 2a and conveyed to the inspection press position (inspection position) along the supply rail 2b.

The printed circuit board a conveyed to the inspection press position is discharged onto the inspection press unit 3 and inspected.
At this time, if the printed circuit board a is a defective product, it is discharged to the defective substrate stock section 5, and if it is a good product, it is discharged to the good substrate stock section 6.

The automatic inspection device thus constructed is
Since it is not necessary to stack and store the printed circuit boards a in the process of (from the dividing process to the process of finishing the inspection), it is possible to save the storage place, the labor for stacking, etc. By doing so, the rate of erroneously determining that the inspection mechanism is defective can be reduced and the inspection rate can be improved.

Further, the carry-in section 7a provided in the inspection mechanism.
Since the printed circuit board a can be carried in from the direction orthogonal to the carrying direction of the carry-in path 7, the arrangement position between the dividing mechanism and the inspection mechanism can be arranged at a position orthogonal to each other, and the working chamber is effective. Can be used for in addition,
Since the inspection mechanism and the dividing mechanism are arranged substantially at right angles, the amount of movement of the person who operates can be reduced.

[0053]

According to the automatic inspection apparatus of the present invention, the dividing printed circuit board is divided by the dividing means and carried out by the carrying-out section. The carried-out printed circuit board is carried into the carrying path by the carrying-in section and sent to the printed board supplying section along the carrying path. That is, since the dividing mechanism and the inspection mechanism can be performed in a continuous process, it is possible to prevent the time loss that has conventionally occurred and the reduction in the reliability of the inspection that accompanies it. The unnecessary work and space for stacking and storing can be omitted.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an automatic inspection device according to an embodiment of the present invention.

FIG. 2 is a schematic plan view showing an automatic inspection device according to an embodiment of the present invention.

FIG. 3 is an enlarged plan view of an essential part showing an automatic inspection device according to an embodiment of the present invention.

FIG. 4 is a use mode diagram illustrating a use example of the automatic inspection device according to the embodiment of the present invention.

FIG. 5 is an enlarged side view of an essential part for explaining an example of using the positioning plate.

FIG. 6 is a perspective view showing a divided printed circuit board.

[Explanation of symbols]

 1 Control Section 2 Printed Circuit Board Supply Section 2a Holding Section 2b Supply Rail 3 Inspection Press Section (Part of Inspection Section) 4 Analysis Section (Part of Inspection Section) 5 Defective Board Stock Section 6 Good Board Stock Section 7 Conveyance Path 7a Carrying In Part 7m Belt conveyor part a Printed circuit board A Divided printed circuit board B Inspection part 8 Dividing mechanism control part 9 Divided printed circuit board supply part 10 Punching press part 11 Board receiving part 12 Cleaner part 13 Board unloading part

Claims (1)

[Claims] 1. A dividing mechanism is provided, comprising a dividing means for dividing a dividing printed board into a plurality of printed boards, and a carry-out section for carrying out the printed board divided by the dividing means. The inspection mechanism includes an inspection unit that inspects whether or not the printed circuit board is provided, a printed circuit board supply unit that supplies the printed circuit board to the inspection position of the inspection unit, and a selection unit that selects the printed circuit board inspected by the inspection unit according to the inspection result. The inspection mechanism is provided with a transport path for transporting the printed circuit board to the printed circuit board supply section, and a carry-in section for transporting the printed circuit boards sequentially carried out from the carry-out section of the dividing mechanism into the transport path is provided as the transport path. An automatic inspection device characterized by being provided.