JPS626103A - Insertion hole position detecting method for printed board in electronic parts automatic inserting machine - Google Patents

Abstract

PURPOSE:To indicate a correct position for inserting parts by rotating a turret having plural insertion heads by 1/2 pitch from a position of the time of insertion of parts, and detecting a parts insertion hole of a print board by a photocoupler. CONSTITUTION:Before inserting parts by controlling an upper turret 15 and a lower turret 16 of the upper and the lower parts of a hole H for inserting electronic parts of a printed board P, an insertion head 51 is shifted by 1/2 pitch of a pitch of the turret and moved to a position of a dotted line. A light source 65 and an optical sensor 75 are made to face the upper and the lower parts of the hole H. The photosensor 75 divides the photodetecting surface equally to four parts, four pieces of outputs from the divided photodetecting surfaces are compared and calculated, and a position of the light source 65 by which its difference becomes '0' is derived. The optical sensor 75 is supported 70 so that a clinch head 53 of the lower turret 16, and the optical sensor 75 are positioned on the same vertical line. By adjusting a data of 1/2 pitch to a position of the light source 65, an insertion head 51 is turned. In this way, an inserting position of the electronic parts can be detected exactly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic electronic component insertion machine that automatically inserts various electronic components into a printed circuit board.

The present invention relates to a method for detecting the position of an electronic part insertion hole formed in a printed circuit board, which is necessary when teaching the electronic part insertion position.

[Prior art]

Fixed resistors, capacitors, and
Various electronic components such as ICs are gripped by one of the plurality of insertion heads provided on the turret, and the printed circuit board (hereinafter also simply referred to as "board") is rotated according to the insertion direction. There is an automatic electronic component insertion machine that automatically inserts electronic components into the specified insertion position above.

The component insertion program for each board by such an automatic electronic component insertion machine is usually created by a programmer based on the drawing of the board, or created using a dedicated program creation machine using the board itself, and then input directly using a keyboard. Alternatively, punched tape, magnetic tape, etc. are used for input.

In addition, since it is uneconomical to have a separate dedicated program creation machine, the electronic component automatic insertion machine itself has a program creation function, and by teaching the insertion position and insertion direction of each component to the board, it is possible to create an insertion program. There are also some that allow you to create .

In such conventional automatic electronic component insertion machines, when teaching the component insertion position, the position of the electronic component insertion hole formed in the board is detected at a specific position away from the position where the electronic component is actually inserted. Alternatively, an insertion hole detector was attached to the insertion head and detected near the actual insertion position.

[Problem that the invention seeks to solve]

However, in the former method, the position where the electronic component is actually inserted by the insertion head and the position where the insertion hole is detected are far apart, so errors are likely to occur, and it is not much different from detecting it in a separate process. Although the latter method reduces errors, it requires as many insertion hole detectors as the number of insertion heads, resulting in high costs.

It is an object of the present invention to solve the problems of the conventional method of detecting the insertion hole position of a printed circuit board in an electronic component automatic insertion machine.

[Means for solving problems]

Therefore, in the method of detecting the insertion hole position of a printed circuit board in an automatic electronic component insertion machine according to the present invention, a turret in which a plurality of insertion heads are provided at intervals is moved 1/2 pitch from the insertion head positioning state at the time of electronic component insertion. The insertion hole detector consisting of a light source and a light sensor facing each other with the printed circuit board in between is inserted into the space between the insertion heads formed at the electronic component insertion position by rotating the electronic component. The position of the hole is detected at the position where the electronic component is actually inserted.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 3 is an external perspective view showing an example of an automatic electronic component insertion machine embodying the present invention.

This electronic component insertion machine has an electronic component insertion bag [1].

This electronic component insertion device i! 1, and a board unloading device 13 that unloads the board into which the electronic component has been inserted.

Electronic component insertion device! 1 has a component insertion mechanism section and a component insertion control section built into the main body of the device, and 2
It is equipped with two IC sequencers 4 and 5.

One IC sequencer 4 has, for example, a 0.6 inch D
An IC that stores multiple sticks that store IP type ICs.
A plurality of cassettes 6 can be stored, and the other IC sequencer 5 can store a plurality of IC cassettes 7 each containing a plurality of sticks storing, for example, 0.3-inch DTP type ICs.

Also, this electronic component insertion device! ! 1 includes an operation panel 8 having a keyboard 8a that can be pulled out, a CRT display 9 for displaying input data, errors, warnings, etc., and an indicator light 10 for operator calls.

The operation panel 8 is equipped with various operation keys including four operation keys 8b for moving the base Fi mounting table mentioned above in the X direction and the Y direction by manual control, and the keyboard 8a is equipped with an insert key. The part code, dimensions,
It is provided with a group of keys for inputting various data such as component data such as the number of bins, data on the insertion direction, and the code of the insertion head to be used since a plurality of insertion heads are selected and used in this embodiment.

Figures 4, S, and 6 show this electronic component insertion bag [1
FIG. 2 is a front view, a top view, and a right side view showing the component insertion mechanism section of FIG.

First, an overview of the operation of this electronic component insertion device will be explained.

This electronic component insertion device 1 carries a board P supplied from a board supply device 2 onto a board mounting table 13 of a board moving mechanism section 12 using a board carrying machine sliding section 11 and mounts it.

Then, the board moving mechanism section 12 moves the circular board mounting table 13 in the X direction and Y direction as shown in FIG. Predetermined position 11 below the head! Position at Q.

On the other hand, ■C sequencers 4 and 5 and axial lead parts supply equipment! ! 14 (FIG. 6) and a component supply device such as a radial lead component supply device (not shown).

As shown in FIG. 4, a plurality of insertion heads 51 are respectively attached to the upper turret 15 provided above the substrate mounting table 13 via insertion spindles 52.
The supplied electronic component is grasped and inserted into the board P by one of the following. At that time, one of the plurality of clinch heads (not shown) attached to the lower turret 16 provided below the board mounting table 13 bends the lead wires of the electronic components inserted into the board on the back side and pulls them out. Make sure not to.

After the component insertion is completed, the board P is pulled out from the board mounting table 13 by the board unloading mechanism section 17, and the board unloading device i! 3.

Next, details of each of these parts will be explained along with their functions.

The substrate carry-in mechanism section 11 carries in the substrates supplied from a magazine (not shown) by the substrate supply device 2 shown in FIG. 3 using the carry-in conveyor 21 shown in FIGS. As shown in FIG. 5, the substrate P is pushed into the substrate frame 25 fixed in the X-axis direction on the substrate mounting table 13 in the substrate moving mechanism section 12 by the pushing rod 23.

Then, a locking claw formed at the tip of a lever 27 fixed to a rod 26 that is pivotally supported in the same direction as the board frame 25 on the board mounting table 13 is inserted into a positioning reference hole drilled in the board P, and the board P is positioned and locked on the board mounting table 13.

The substrate mounting table 13 is placed on an X frame 31 that is movable in the X direction on a base frame 30, and is rotatably placed on a Y frame 32 that is movable in the Y direction.

The X frame 31 is a pair of parallel guides fixed on the base frame 30 in the X-axis direction! 13.33, and is reciprocated in the X direction by a feed screw 35 rotated by a DC servo motor 34.

Further, the Y frame 32 is slidably mounted on guideways 36° 36 fixed in the Y-axis direction on both sides of the X frame 31, and is driven by a feed screw 38 rotated by a DC servo motor 37. It is moved back and forth in the Y direction.

Furthermore, as shown in FIG. 5, the outer periphery of the board mounting table 13 is removably fitted into the grooves of four grooved guide rollers pivotally supported at the four corners of the Y frame 32. Rotatably supported.

Pinion 4 rotated by stepping motor 40
1 and the board mounting table 1 that meshes with this pinion 41
1 is rotated around a central axis (θ axis, not shown) via a ring gear 13a formed at the lower part of 3 itself.

Therefore, each of these motors 34, 37, 40 is controlled by NC according to a predetermined program created in advance, and the board mounting table 13 is controlled according to the insertion position and insertion direction of the component.
Move in the X direction and Y direction, and also move the center axis (0 axis)
from the reference position around the desired angle 1, e.g. 90”, 180”
or 270 degrees to position the component insertion position of the board P at the regular position Q.

The supply of IC parts is carried out from the IC cartridges 6 and 7 (Fig. 3) mounted on the IC sequencer 4 or 5 provided on both sides of the board mounting table 13 as shown in Fig. 4.
C is selectively carried out and guided to the chute 46 by the conveyor 45, and while the chute 46 is lowered, the supply direction of the IC parts is checked and the posture is corrected by the additional function bag [47], and the parts are placed on standby at the exit of the chute 46. This is done by supplying the position.

Also, lead components such as resistors and capacitors are
As shown in the figure, an axial lead component supply device 14 provided behind the board mounting table 13 and a radial lead component supply device (not shown) wrap the taped lead components into a loop 48 or into a folded carton. They are drawn out and supplied sequentially.

The upper turret 15 (FIG. 4) has a plurality of insertion spindles 52 having insertion heads 51 at their tips corresponding to the type of inserted parts placed at intervals on the outer surface of a turret base 50 in the shape of a truncated pyramid, which is arranged to rotate once. It is installed by hand.

The insertion head 51 is an axial lead part, a radial lead part, and a 0.6 inch DIP type IC.

Different structures and dimensions are provided depending on the type of inserted parts, such as 0.3 inch I) IP type rc.

DTP type ICs have different lengths depending on the number of pins, but
This is inserted with a common insertion head to avoid increasing the number of insertion heads. At this time.

Although the center of the insertion head and the center position of the insertion component (CDTP type IC) may differ, by correcting the position of the insertion head so that the center of the insertion head is offset from the component insertion position according to the number of bins. , the insertion head is standardized.

On the other hand, as will be described later with reference to FIG. 1, the lower turret 16 also has a plurality of clinch heads therein depending on the type of parts to be inserted.

Therefore, depending on the parts to be inserted, the upper turret 15
After selecting the insertion head 51 and the clinch head of the lower turret 16 and positioning them at the fixed position Q, the insertion head 51 and the clinch head, which have gripped the supplied part, are lowered and raised together to lower and raise the part. The lead wire is inserted into the insertion hole of the board P, and the tip of the lead wire is bent and fixed.

After inserting all the parts, rod 2 on the board mounting table 13
By engaging the release tool S5 and rotating the lever 27, the locking pawl is removed and the board P is unlocked.

Then, the substrate unloading mechanism section 17 engages the pull-out claw 58 attached to the tip of the pull-out rod 57 (FIG. S) driven by the drive chain 56 with the push-in side edge of the substrate P.
The substrate P is pulled out from the substrate mounting table 13 and conveyed to the substrate unloading device 3 (FIG. 3) by the unloading conveyor 5.

Next, using this electronic component automatic insertion machine itself.

The insertion hole detector used for teaching the component insertion position with respect to the board P will be explained with reference to FIGS. 1 and 2.

FIG. 1 is a schematic side view showing how the light source and optical sensor constituting the insertion hole detector are installed.

As described above, the turret base 50 of the upper turret 15 has a number of insertion spindles 52 radially spaced apart each holding a different insertion head 51 selected according to the type of component to be inserted into its pyramidal circumferential surface. When the turret stand 50 is indexed and rotated about the axis L+ by a motor (not shown), any one of the insertion spindles 52 can be attached to the board mounted on the board mounting table 13 as shown. The position is perpendicular to P, and the center of the insertion head of the insertion head 51 is the fifth position.
Position at the predetermined position I[Q in the figure.

Close to the upper turret 15, a support arm 44 fixed to a fixed part (not shown) extends vertically from above, and has a guide member 61 and an air cylinder 62 at its lower end.
are each mounted at an angle of approximately 45'' with respect to the vertical direction.

The guide member 61 guides and holds a slide member 63 slidably in the direction of the arrow, and the slide member 63 holds a cylindrical light source 65 vertically by a holder 64 attached to its tip. The light source 65 is a spot light source such as a semiconductor laser light source, and emits a spot light having a diameter sufficiently larger than the diameter of the lead wire insertion hole H of the electronic component formed on the board P, and directs the light spot light toward the board P as shown by the optical axis Ω. irradiate.

Further, a slide member 63 holding the light source 65 is connected to the tip of a piston rod 67 of the air cylinder 62 via a bracket 66.

Thereby, the air inlet/outlet 68. From air cylinder 62
When compressed air is introduced into the piston rod 67, the piston rod 67 is expanded to move the slide member 63 and the light source 65 held therein to the use position shown by the solid line.

At this time, the turret stand 50 rotates by 1/2 pitch from the insertion head positioning state and misses the insertion head 51, and the light source 65 is inserted into the gap between the two insertion heads 51.

Further, when compressed air is introduced into the air cylinder 62 from the air inlet/outlet 68b, the piston rod 67 contracts, and the slide member 63 and the light source 65 held therein are retracted to the position shown by the imaginary line. Interference with the insertion head 51 or the insertion spindle 52 is prevented during out-rotation.

These constitute a light source support and movement device 60. Although not shown, a stopper is provided for regulating the forward end position and the backward end position of the slide member 63.

On the other hand, the lower turret 16 is provided on the lower side of the board P, as described above, in which a number of clinch heads 53 are arranged along the circumferential direction of the turret board 54 and are selected according to the type of parts to be inserted. The turret board 54 is indexed and rotated about the axis L2 by a motor (not shown), so that any one of the clinch heads 53
Place the center at the specified position in Figure 5! Position at Q.

A bracket 71 is fixed to a fixed part (not shown) adjacent to the lower turret 16, and a guide member 72 is attached to the bracket 71.
is fixed at an angle of approximately 45° with respect to the vertical direction.

This guide member 72 guides and holds a slide member 73 slidably in the direction of the arrow.
A holder 74 attached to the tip holds the optical sensor 75 with its light-receiving surface horizontal.

Further, this slide member 73 has a rack 76 fixed along its sliding direction, and a pinion gear 77 pivotally supported by the bracket 71 is engaged with the rack 7 .

A toothed pulley 79 is integrally connected to this pinion gear 77 by a shaft 78, and a toothed belt 82 is stretched between the toothed pulley 81 fixed to the shaft of a rotary actuator 80 such as a motor or a rotary solenoid. ing.

Therefore, when the rotary actuator 80 rotates, depending on the direction of rotation, the slide member 73 and the optical sensor 75 held therein are moved to the position shown by the solid line or the position shown by the phantom line via the toothed belt 82, pinion gear 77, rack 76, etc. move it.

Note that a light shielding plate 83 is attached to the slide member 73, and it is connected to the forward end detection sensor 84 or the backward end detection sensor 8.
rotary actuator 80 when detected by
stop the rotation.

These constitute the optical sensor support and movement device 70.

'By this optical sensor support and movement device 70, the optical sensor 7
5 to the position shown by the solid line, at the same time as the turret base 50 of the upper turret 15 is rotated by 1/2 pitch, the turret plate 54 of the lower turret 16 is also rotated by 172 pitches from the clinch head positioning state, and the clinch head is rotated by 172 pitches. 53 to escape, the optical sensor 75
is inserted into the gap between the two clinch heads 53 and faces the light source 65 with its center aligned with the optical axis Q, and when the turret disk 54 is indexed and rotated, it retreats to the position shown in the imaginary line and engages the clinch heads 53. prevent interference.

In this way, when detecting the insertion hole of the board P.

An insertion hole detector consisting of a light source 65 and a light sensor 75 is inserted into the insertion head 51 and the clinch head 5 when inserting one component.
The position of the insertion hole H can be detected by positioning it at the same position as 3.

It goes without saying that the insertion hole detection method according to the present invention can also be applied to an electronic component automatic insertion machine that does not have a lower turret or a clinch head.

Here, FIG. 2 shows an example of the configuration of the optical sensor 75 and an optical sensor circuit for accurately detecting the position of the insertion hole.

The optical sensor 75 has a photoelectric element 75. such as a phototransistor or a photodiode with uniform characteristics in each part of the light-receiving surface divided into four parts. ~7Sd are arranged symmetrically with respect to the center of the light receiving surface.

5. Therefore, it is installed so that the x-X line and the y-y line in the figure coincide with the X direction and Y direction in FIG. In addition.

Well-known circuits such as a bias application circuit and a detection signal amplification circuit for each photoelectric element are omitted from illustration.

The optical sensor circuit 90 includes the photoelectric element 75 of this optical sensor 75.
The detection signals from the photoelectric elements 7Se and 75d are added to the addition circuit 86, the detection signals from the photoelectric elements 7Se and 75d are added to the addition circuit 87, and the detection signals from the photoelectric elements 75a and 75d are added to the addition circuit 88.
The detection signals from the photoelectric elements 7Sb and 75c are added by an adding circuit 8 days.

Furthermore, by calculating the difference between the output signals of the adder circuits 86 and 87 using the difference detector 91, a signal (0, +, - ). Similarly, by calculating the difference between the output signals of the adder circuits 88 and 89 using the difference detector S2, a signal (0, +, −) is obtained.

When it is thought that variations occur in the brightness of the light 165, dividing the difference between the output signals from the difference detectors 91 and 92 by the total amount of light received by the photoelectric elements 75a to 75d will further increase the signal indicating the magnitude of the deviation. It will be accurate.

Therefore, by moving the substrate P in FIG. 1 so that the specified insertion hole H to be taught is illuminated by the light source 65, the output signals of the difference detectors S1 and 92 in FIG. 0, the center of the insertion hole H and the center of the light receiving surface of the optical sensor 75 will match, and the position (xy!I?I) of the insertion hole H at this time will be in the X direction and Y direction from the origin. It can be detected accurately by reading the distance in the direction.

Next, with reference to FIG. 7, the configuration of the control section and the operation during teaching in this automatic electronic component insertion machine will be explained.

This control section receives signals from a manual control means 18 including four operation keys 8b on the operation panel shown in FIG.
An X-direction control circuit 100 that inputs direction signals, and a Y-direction control circuit 200 that similarly inputs Y-direction signals.
, a storage unit 300 consisting of ROM and RAM, and a CPU.
It is configured by a calculation unit 400 and the like.

The X-direction control circuit 100 includes a switching circuit 101, a sensor signal detection circuit 102, and a servo motor control circuit 103.
A direction signal is output to the servo motor control circuit 103 to control the servo motor 34 for moving the X frame shown in FIG.

After a reading start signal is input from the operation panel 8 to the sensor signal detection circuit 102, when a detection signal in the X direction is input from the optical sensor circuit 90, the sensor signal detection circuit 102 outputs a switching signal S1 and switches. The circuit 101 is an optical sensor circuit SO
The detection signal in the X direction from the servo motor control circuit 103
Switch to output to .

Then, the detection signal in the X direction from the optical sensor circuit 90 is 0.
When , the sensor signal detection circuit 102 outputs a reading command signal S2 to the calculation section 400.

Similarly, the Y-direction control circuit 200 includes a switching circuit 201, a sensor signal detection circuit 202, and a servo motor control circuit 203, and the switching circuit 201 normally transfers the Y-direction signal from the manual control means 18 to the servo motor control circuit 203. Servo motor 3 for moving the Y frame shown in FIG.
It controls 7.

After a reading start signal is input from the operation panel 8 to the sensor signal detection circuit 202, when a detection signal in the Y direction is input from the optical sensor circuit SO, the sensor signal detection circuit 202 outputs a switching signal S3 and switches. The circuit 201 is an optical sensor circuit SO
The Y-direction detection signal from the servo motor control circuit 203
Switch to output to .

Then, the detection signal in the Y direction from the optical sensor circuit 90 is 0.
When , the sensor signal detection circuit 202 outputs a reading command signal S4 to the calculation section 400.

Therefore, when teaching one of the many lead wire insertion holes formed in the board.

The four operation keys 8b of the manual control means 18 are operated to designate the moving direction of the substrate P in the X direction and the Y direction.

After moving the board to the position where the spot light from the light source 65 in FIG. 1 starts to illuminate the insertion hole H, or in the vicinity thereof,
Press the reading start key (not shown) and the spot light will move to the insertion hole H.
After making fine adjustments to illuminate the light sensor circuit 90,
The minute movement of the substrate is automatically controlled by the detection signal from.

That is, the servo motor is set so that the detection signals from the four photoelectric elements 75a to 75d of the optical sensor 75 shown in FIG. 2 are all equal! Drive 14.37.

And four light receiving elements 75. When all the signals from ~75d become equal, both the X direction and Y direction signals from the optical sensor circuit 90 become O, and the servo motor 3
At the same time as 4.37 stops, a reading command signal S2*S4 is output.

The servo motors 34 and 37 are connected to encoders 104 and 204 that generate pulses every time they rotate by a predetermined angle and detect the direction of rotation, and the generated pulses are converted into the direction of rotation by count circuits 105 and 205, respectively. By counting up or down accordingly,
Measure the amount of movement from the coordinate origin in the direction and Y direction.

The storage unit 300 includes a one-machine system coordinate storage unit 310, an insertion data storage unit 320, a parts table storage unit 330, and a table positioning data (XYθ) storage unit 340.

The machine system coordinate storage unit 310 stores table rotation center coordinates and insertion head center coordinates specific to the machine in advance.

It stores correction data such as the center coordinates of the optical sensor and the offset amount between the center of the insertion chuck and the center of the inserted component.

The inserted data storage section 320 includes the keyboard 8. of FIG.
(Pull out and use) A part code that indicates the part name or part symbol of each part to be inserted, a Rad code to insert to specify the insertion head to be used when inserting each part, and a RAD code to specify the insertion direction of the part. It stores data and the like, and also stores the XY coordinate data of each component insertion position calculated by the calculation unit 400.

The component table storage unit 330 stores component data such as dimensions, lead wire spacing and number, etc. for each component code of each component to be inserted, which is input from the keyboard 8a or from an external data source using punch tape or other means. remember.

The table positioning data storage section 340 includes a calculation section 40.
The rotation angle θ of the board mounting table 13 calculated by 0 and the XY coordinate data for positioning the board mounting table so that the component insertion position of the board coincides with the center of the insertion head after the rotation are stored.

The calculation unit 400 includes a coordinate reading calculation unit 410, an insertion head center coordinate calculation unit 420, and a table positioning data calculation unit 430.

The coordinate reading calculation unit 410 receives the count value of the count circuit 105 when the reading command signal S2 is input from the X direction control circuit 100 and the reading command signal S from the Y direction control circuit 200.
4 is input, the count value of the count circuit 205 is read, the difference between the optical sensor center coordinates and the insertion head center coordinates stored in the mechanical system coordinate storage unit 310 is corrected, and the printed circuit board of the detected insertion hole is read. Calculate the XY coordinates with respect to the coordinate origin.

The XY coordinates of the substrate read and calculated by the coordinate reading calculation unit 410 are input to the insertion head center coordinate calculation unit 420 and are stored in the insertion data storage unit 320.

Note that the XY coordinates of this board are the XY coordinates of the specified insertion hole of the 1-piece component, and without using this reading function,
It is also possible to input the XY coordinates directly from the keyboard 8a as insertion data and store the insertion data in the storage unit 320.

The insertion head center coordinate calculation unit 420 calculates the XYI of this board.
The insertion data storage unit 3 stores the part code of the part to be inserted at the Ii mark and its coordinate position, the part data corresponding to this part code, the insertion head to be used, the insertion direction of the part, etc.
20 and the component table storage unit 330 to calculate the coordinates of the center of the insertion head.

In particular, in the case of an IC component, the offset amount between the center position of the component and the center coordinates of the insertion head is calculated from the insertion direction and the number of pins, and the XY coordinates of the board are corrected.

Based on the insertion head center coordinates calculated in this way and the insertion direction data of the component stored in the insertion data storage section 320, the table positioning data calculation section 430 determines the rotation angle θ of the printed circuit board at the time of component insertion. The XY coordinates at which the center of the insertion head should be positioned relative to the component insertion position of the rotated board are calculated.

At this time, necessary corrections are made using the table rotation center coordinates and insertion head center coordinates stored in the mechanical system coordinate storage section 310 and data such as component data and insertion head number stored in the component table storage section 330.

Then, the data calculated by the table positioning data calculation unit 430 are sequentially stored in the table positioning data storage unit 340 of the storage unit 300.

When actually inserting a component, the component is selected according to the component code stored in the insertion data storage section 320, is supplied to the insertion head selected by the RAD code, and the XY coordinates and XY coordinates stored in the table positioning data storage section 340 are The printed circuit board rotates and moves according to the insertion angle θ, and the component is inserted into the printed circuit board.

In this way, 1, for example, the optical sensor 5 sequentially detects the insertion hole position of the pin of each component to be inserted into the board P that is closest to the origin of the board, and the part code and insertion direction data are sequentially input from the keyboard 8a. By doing so, it is possible to create a component insertion program within this electronic component automatic insertion machine.

〔Effect of the invention〕

As explained above, according to the method for detecting the insertion hole position of a printed circuit board in an automatic electronic component insertion machine according to the present invention, a turret in which a plurality of insertion heads are provided at intervals can be adjusted from the positioning state at the time of electronic component insertion. The position of the insertion hole is detected by rotating the printed circuit board by 172 pitches and inserting an insertion hole detector consisting of an opposing light source and optical sensor into the space between the insertion heads formed at the electronic component insertion position. The insertion hole of the printed circuit board can be detected at the position where the electronic component is inserted, and teaching of the electronic component insertion position can be performed without making an error.

Moreover, since only one set of insertion hole detectors is required, the cost does not increase.

[Brief explanation of drawings]

FIG. 1 is a schematic side view showing how a light source and optical sensor are installed, which constitute an insertion hole detector used to carry out the present invention. FIG. 2 is a circuit configuration diagram showing an example of the configuration of the optical sensor 75 and an optical sensor circuit for detecting its signal, and FIG. 3 is an external perspective view showing an example of an automatic electronic component insertion machine implementing the present invention. Figures 4, 5, and 6 also show g! when the electronic component is inserted. FIG. 1 is a front view showing the component insertion mechanism section of No. 1; The plan view, right side view, and FIG. 7 are block diagrams showing the configuration of the portions of the control section related to the present invention. P... Printed circuit board +4... Insertion hole 1...
Electronic component insertion device 2... Board supply device 3... Board unloading device 4, 5... IC sequencer 6.7...
IC cassette 8... Operation panel 8a... Keyboard 8b... Manual operation key 9... CRT display 10... Indicator light 11... Board loading mechanism section
12... Board moving mechanism section 13... Board mounting table 14... Lead component supply device 15... Upper turret 16... Lower turret 17... Board unloading mechanism section 18... Manual control means 25... Board frame 31
...X frame 32...Y frame 34.
37... DC servo motor 3 days... Guide roller 40... Stepping motor 50... Turret stand 51... Insertion head 52... Insertion spindle 53... Clinch head 54... Turret board 60... Light source support moving device 65... Light source 70... Optical sensor supporting moving device 75... Optical sensor 90... Optical sensor circuit 100... X direction control circuit 200... Y direction control Circuit 300...Storage unit 400...Arithmetic unit Figure 2 Procedural Amendment (1st page) January 7, 1986 Director General of the Patent Office Michibu Uga 1, Indication of Case Patent Application No. 1988-216179 2 , Name of the invention Method for detecting the insertion hole position of a printed circuit board in an automatic electronic component insertion machine 3, Relationship to the case of the person making the amendment Patent applicant 2-1-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo (196) Citizen Watch Co., Ltd. 4. Agent: 1-20-5 Higashiikebukuro, Toshima-ku, Tokyo Column 6: Detailed explanation of the invention in the specification, Contents of amendments

Claims (1)

[Scope of Claims] 1. An automatic electronic component insertion machine that grips an electronic component and automatically inserts it into a printed circuit board using one of a plurality of insertion heads provided at intervals on a turret. The turret is rotated by 1/2 pitch from the insertion head positioning state when inserting the electronic component, and an insertion hole consisting of a light source and a light sensor facing each other with a printed circuit board in between is formed in the space between the insertion heads formed at the electronic component insertion position. A method for detecting the position of an insertion hole in a printed circuit board, comprising inserting a detector to detect the position of an electronic component insertion hole formed in the printed circuit board.