JPS6138221Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a printed circuit board mounting position detecting device for an electronic component automatic insertion machine that automatically mounts electronic components on a printed circuit board.

BACKGROUND ART AND THEIR PROBLEMS An electronic component automatic insertion device automatically mounts electronic components on a printed circuit board mounted at a predetermined position of the machine, for example, according to a program stored in an NC control unit. Therefore, in order to mount electronic components on a printed circuit board, the printed circuit board must be correctly mounted in a predetermined position. Conventionally, optical detection devices have been used to detect whether a printed circuit board is correctly mounted in a predetermined position, but such devices detect changes in environmental brightness and There were many malfunctions due to dust generated when inserting components into the printed circuit board, and the problem was that smooth operation of the machine was not achieved. Furthermore, it is relatively difficult to arbitrarily change the detection accuracy, which is not preferable. Other detection means include, for example, microswitches, but contact-type position detection devices such as microswitches have the drawback of being subject to frequent wear and damage.

Purpose of the invention This invention was devised in view of these problems.The purpose of this invention is to reduce malfunctions caused by changes in environmental brightness or dust, eliminate wear and damage, and change detection accuracy arbitrarily. An object of the present invention is to provide a printed circuit board mounting position detection device in an automatic electronic component insertion machine that can perform the following steps.

Summary of the invention The details of the invention are mainly described in the sections (General description of automatic electronic component insertion machine), (Structural description of printed circuit board mounting position detection device), and (Operation description) in the examples described later. There is. Therefore, the outline of the present invention will be described with reference to the reference numerals used in this embodiment. In order to achieve the above object, the present invention supplies a printed circuit board from the printed circuit board supply device 11 to a predetermined position of the component insertion device 15. Attach 10,
An electronic component automatic insertion machine that automatically mounts electronic components onto the printed circuit board 10 includes a detection pin 102 that can be inserted into a detection hole 103 formed in the printed circuit board 10; The linked flapper 105,
The nozzle 106 is configured to detect whether or not the detection pin 102 is inserted into the detection hole 103 by changing the position of the flapper 105 with respect to the nozzle 106. is detected by a change in the back pressure of the printed circuit board 10.
The device is configured to detect whether or not the device is mounted at a predetermined mounting position.

By configuring as described above, malfunctions are reduced, there is no wear or damage, and detection accuracy can be changed arbitrarily.

Embodiment An embodiment of an automatic electronic component insertion machine to which the present invention is applied will be described below with reference to the drawings. This electronic component automatic insertion machine inserts lead wires of electronic components into through holes formed in a printed circuit board, and automatically mounts the electronic components on the printed circuit board.

General description of automatic electronic component insertion machine First, the outline of this automatic electronic component insertion machine will be explained with reference to FIG.
An X-Y table 13 is equipped with a pair of left and right turntables 12 on which the printed circuit board supplied from 1 is placed, and electronic components are supplied to the printed circuit board mounted on the turntable 12 and inserted into the through holes of the printed circuit board. a component insertion device 15 equipped with a pair of left and right insertion heads 14 for inserting lead wires;
An X-Y table moving device 16 for moving the X-Y table 13, a pair of left and right printed circuit board ejection devices 17 for ejecting printed circuit boards into which components have been inserted, and a pair of left and right printed circuit boards for storing ejected printed circuit boards. It is composed of a stocker 180.

As shown in Figure 1, this electronic component automatic insertion device is configured symmetrically in the left and right directions, and electronic components are automatically mounted on two printed circuit boards at the same time, one on the left and one on the left. There is. Therefore, in the following explanation, the structure of only the left side component will be mainly explained.

Structural Explanation of Printed Circuit Board Supply Device First, the printed circuit board supply device 11 will be explained with reference to FIGS. 2 and 3. A printed circuit board receiving plate 22 is attached to a frame 21 of this supply device 11 in an inclined state. . That is, as particularly shown in FIG. 3, the receiving plate 22 is connected to a pair of pins 24 via a pair of arms 23, and these pins 24
is supported on the frame 21 by a bracket 25. The printed circuit boards 10 are arranged vertically on this receiving plate 22. The rear surface of the printed circuit board 10 is a weight 27 placed on a trolley 26.
The front surface of the frontmost printed circuit board 10 is received by a roller 28. The roller 28 is rotatably supported by a pair of brackets 29, which are further fixed to the frame 21. Furthermore, roller 2
The lower part of the printed circuit board 10 at the forefront that is in contact with the terminal 8 is removed from the receiving plate 22, so that the printed circuit board 10 can be moved downward.

A pair of rods 30 are arranged on the front side of the printed circuit board feeding device 11 side by side in FIG. 2, and are vertically supported by a frame 21. A scraping rod support plate 31 is supported at the upper end of this rod 30 so as to be slidable up and down. That is, sleeves 32 are fixed to both left and right ends of the support plate 31 in FIG. 2, and the sleeves 32 are slidably fitted to the rod 30 via slide bearings. And the lower end of this sleeve 32 and the rod 3
A compression coil spring 34 is interposed between the support plate 31 and the ring 33 fixed to the rod 30, and the support plate 31 is urged to slide upward along the rod 30, and the upper end of the sleeve 32 is a frame 35 connecting the left and right rods 30 at their upper ends.
is in contact with.

Slits 36 extending in the horizontal direction are formed in the scraping rod support plate 31, and a pair of scraping rods 37 are fixed by bolts 38 inserted through these slits 36. Rollers 39 are rotatably attached to the lower part of this rod 37, and these rollers 39 are configured to roll in contact with the surface of the printed circuit board 10 at the forefront. Also, the scraping rod 37 has a stepped portion 40.
is formed, and as the rod 37 descends, this stepped portion 40 engages with the upper edge of the printed circuit board 10 to move the foremost printed circuit board 10 downward.

A support shaft 41 is fixed to the frame 35, and a press lever 42 is rotatably supported by the support shaft 41. A roller 43 is rotatably supported at one end of the pressing lever 42 and can come into contact with a pressed portion 44 attached to the upper end of the scraping rod support plate 31. The other end of the push lever 42 is engaged with a roller 45a attached to the push rod 45. This rod 45 is slidably supported by a sliding guide 46 fixed to the frame 21.

The pair of rods 30 also support a printed circuit board moving frame 47 in a vertically slidable manner. That is, a pair of left and right sleeves 48 are attached to the frame 47, and these sleeves 48 are fitted to the rods 30 via slide bearings, thereby allowing the frame 47 to slide vertically up and down. Supported. The connecting portion 49 at the bottom of this frame 47 is connected to the air cylinder 5.
0 rod 51. Therefore, the frame 47 is configured to move up and down by the operation of the air cylinder 50. A push bolt 52 is fixed to the right end of the frame 47 in FIG. 2, and this bolt 52 is configured to press the lower end of the rod 45 as the frame 47 moves upward.

Furthermore, a pair of bearings 53 are attached to this frame 47, and a rotating shaft 54 is supported by these bearings 53. A pair of printed circuit board moving arms 55 are fixed to this rotating shaft 54 . In particular, as shown in FIG. 5, the arm 55 has a slit-like notch 5 for inserting a printed circuit board.
6 is formed. A printed circuit board gripping cam 57 is disposed inside this arm 55. The center of curvature of the gripping portion 58 of the cam 57 is eccentric with respect to the pin 59 that is the center of rotation of the cam 57. Further, a long hole 60 is formed in this cam 57, and a pin 61 is loosely fitted into this long hole 60. The pin 61 passes through a small hole in the release rod 62 and further passes through a long hole 63 in the arm 55 to protrude from the side of the arm 55. This pin 61 and a pin 6 implanted on the side of the arm 55
4, a coil spring 56 is stretched between the coil spring 56 and the coil spring 56.
As a result, the cam 57 is urged to rotate counterclockwise in FIG. 5 about the pin 59.
The printed circuit board 10 inserted into the slit 56 is thereby gripped. A roller 66 is attached to the tip of the release rod 62, and a semicircular cam 67 is disposed so that the roller 66 comes into contact with it in the lower position in FIG. This cam 67
is attached to the connecting portion 49 of the frame 47 via an L-shaped bracket 68.

An arm 69 is further fixed to the rotating shaft 54. A roller 70 is attached to the tip of this arm 69. The roller 70 is fitted into a cam groove 72 of a cam 71 attached to the frame 21. Therefore, frame 47 is rod 3
0, the roller 70 moves within the cam groove 72 and rotates the rotating shaft 54 due to the shape of the cam groove 72, thereby rotating the printed circuit board 10 supported by the arm 55. It will have to be rotated.

Furthermore, an air cylinder 74 is attached to the lower part of the frame 21 via a support plate 73, as shown in FIG. A pressing block 76 is fixed to the tip of the piston rod 75 of this cylinder 74. This block 76 is formed with a stepped portion 77 for pressing the rear end portion of the printed circuit board 10. The rear end portion of the printed circuit board 10, which is maintained horizontally by the stepped portion 77, is pressed and supplied to the turntable 12.

Explanation of structure of X-Y table and turntable Next, X-Y table 13 and turntable 12 provided on this X-Y table 13
The structure will be explained with reference to FIGS. 6 to 14.

The X-Y table 13 is composed of a plate-shaped body, and is configured to be moved in the X direction and the Y direction (horizontal direction and vertical direction in FIG. 6) by an X-Y table moving device. There is. As shown in FIG. 15, a caster ball 81 is appropriately provided on the lower surface of this table 13, and this caster ball 81 allows the X-Y table 1 to be
3 moves smoothly.

At the left end of this X-Y table 13 in FIG.
A pair of guide rails 82 and 83 are arranged to guide the printed circuit board 10 to the table 13. These guide trays 82 and 83 are fixedly held by a pair of L-shaped brackets 68 of the printed circuit board supply device 11. Therefore, the rails 82 and 83 are configured to move up and down as the printed circuit board moving frame 47 moves up and down.
An air cylinder 84 is fixed to the lower surfaces of these rails 82 and 83. Further, a pressing rod 85 is fixed to the tip of one of the rails 82 (see FIG. 8). Steps 86 and 87 are formed on the rails 82 and 83, and the printed circuit board 10 is pushed by the rod 75 of the cylinder 74 while being guided by both sides of the printed circuit board 10. It will be supplied onto the X-Y table 13.

There are three guiding rollers 8 on the X-Y table 13.
These rollers 88 rotatably support the turntable 12 relative to the XY table 13. The turntable 12 is configured in a ring shape, and has a relatively large circular opening 89 formed therein. A pair of printed circuit board guide rails 90 and 91 are arranged horizontally and facing each other in FIG. 6 so as to cross a part of this opening 89. These rails 90, 91 are supported by a pair of pins 93 embedded in a mounting plate 92, as shown in FIG. Note that the elongated holes 94 formed in the rails 90, 91 and fitted with the pins 93 are inclined with respect to the length direction of the rails 90, 91,
As a result, when the rails 90, 91 are pushed in the length direction of the mounting plate 92, the distance between the rails 90, 91 becomes wider. rail 90,
A step 95 is formed in the step 91.
5 to support the printed circuit board 10. Further, a presser plate 96 is attached to the upper part of the rails 90 and 91.

And of the pair of rails 90, 91, the sixth
In the figure, the mounting plate 92 of the upper rail 90 is directly attached to the turntable 12, and the lower rail 91 is attached to these rails 90, 91.
It is mounted to the turntable 12 via a pair of rail mounting plates 98, which are disposed perpendicular to the rails 10 and 12, and are mounted to the turntable 12 by a pair of arms 97, respectively. That is, by changing the mounting position of the rail 91 on the mounting plate 98, the rail 9
The interval between 0 and 91 can be adjusted.

Explanation of Structure of Printed Circuit Board Mounting Position Detection Device Next, we will explain the detection device for detecting whether or not the printed circuit board 10 moved onto the pair of rails 90, 91 is in the correct position, especially in FIGS. 7 to 9. Specifically, a rotating shaft 100 is attached to the turntable 12 via a pair of brackets 99. A pair of detection pins 102 are attached to the rotating shaft 100 via arms 101, respectively. These detection pins 102 are designed to be inserted into reference holes 103 formed in the printed circuit board 10. Further, a flap rod 105 is attached to the rotating shaft 100 via an arm 104. And this flats parody 1
An air nozzle 106 is disposed so as to face the tip of the air nozzle 05, and is attached to the XY table 13. When the detection pin 102 is correctly inserted into the reference hole 103, this nozzle 106 is closed by the tip of the flapper rod 105, and the back pressure of the nozzle 106 increases, thereby causing the printed circuit board 10 to move onto the turntable. Correct placement on 12 is detected.

Further, as shown in FIG. 8, a pressed arm 107 is fixed to the left end of the rotating shaft 100 in FIG. 6. As shown in FIG. A pressing bolt 108 is attached to the tip of the guide rail 82 opposite to the arm 107. When the guide rail 82 moves with the lowering of the frame 47, this bolt 108 pushes the pressed arm 107 and rotates the rotating shaft 108.
is designed to be rotated clockwise in FIG. As a result, the detection pin 102 moves upward and is retracted to a position where it does not interfere with the insertion of the printed circuit board 10.

The detection pin 102 inserted into the reference hole 103 of the printed circuit board 10 has a triangular pyramid-shaped tip as shown in FIG. Therefore, even if there is a slight deviation in the position of the printed circuit board moved onto the turntable 12, this detection pin 1
Correct positioning is achieved by the triangular pyramid-shaped tip of No. 02, and the above-mentioned deviation is corrected. Also, the reference hole 103 of the printed circuit board 10
This will reduce the insertion resistance of the pin 102 when it is inserted into the holder.

Description of the rotary drive frame structure of the turntable Next, this turntable 12 is adapted to rotate through 90 degrees, and the rotational drive mechanism of this turntable 12 will be explained with reference to FIGS. 10 to 12.
A gear 109 is formed on the outer peripheral surface of the turntable 12. This gear 109 meshes with a turntable driving gear 110. Note that the driving gear 110 is connected to the rotating shaft 1 as shown in FIG.
11, and this rotating shaft 111 is
It is rotatably supported by a cap-shaped bearing box 112 fixed to the Y table 13 via a ball bearing 113. Further, a clutch box 114 is fixed to the lower surface of the drive gear 110. And in this clutch box 114 there are 5
Two donut-shaped steel plates 115 and five donut-shaped artificial leather plates 116 are arranged in alternating contact with each other, thereby forming a friction clutch. Then, as shown in Fig. 12, four steel plates 1
Three steel plates 115 out of 15 have protrusions 11 on the inside.
7 are connected in series, and this protruding piece 117 is loosely fitted into a key groove 119 formed in the input side disk 118. Further, the remaining two steel plates 115 are provided with protruding pieces 120 connected to the outside thereof, and these protruding pieces 120 are loosely fitted into a key 121 formed on the inner peripheral surface of the clutch box 114. The input disk 118 is rotatably supported by the rotating shaft 111, and a sprocket 122 is fixed to the lower end of the input disk 118.

A chain 123 wound around this sprocket 122 is connected to a rod 126 of an air cylinder 125 via a connecting fitting 124. This rod 126 is made of twisted steel wires and sealed in a synthetic resin body, and is flexible. This rod 126 is fixed to a piston 127, and a pair of guide rollers 12
It is guided by 8 and continues endlessly. Therefore, when the air cylinder 125 is driven,
The rod 126 moves, and the movement of the rod 126 is transmitted to the chain 123 via the connecting fitting 124, causing the chain 123 to move. The sprocket 122 is thus configured to be rotationally driven. The rotation of the sprocket 122 is transmitted to the gear 110 through the friction clutch made of the steel plate 115 and the artificial leather 116, thereby driving the turntable 12 in rotation.

Next, the rotational positioning mechanism of the turntable 12 will be described. A positioning block 129 is fixed to the outer peripheral portion of the turntable 12 as shown in FIG. A pair of bolts 130 and 131 are attached to both sides of this block 129 so as to be adjustable. A pair of stoppers 132 and 133 are provided on the XY table 13 in correspondence with this block 129. These stoppers 132 and 133 are each provided with a stop projection 134 and a buffer projection 135. Therefore, the rotating turntable 1
The bolt 130 of the second block 129 first contacts the buffer projection 135, and then the bolt 131 contacts the stop projection 134. As a result, the turntable 12 is positioned at a predetermined angular position. The overstroke of the rod 126 of the air cylinder 125 at this time is absorbed by the slip of the clutch made of the steel plate 115 and artificial leather 116.

Explanation of Structure of Printed Circuit Board Retrieval Device Next, a device for retrieving the printed circuit board 10 on which electronic components are mounted on the turntable 12 will be explained with reference to FIGS. 15 to 18.

A shoe 141 is arranged below the opening 89 of the turntable 12 on the XY table 13. This shooter 141 is fixed to a rotating shaft 142 via an arm 143. Note that the rotating shaft 14
2 is rotatably attached to the support column via a bearing 144. Furthermore, a pressed arm 145 is attached to the rotating shaft 142. This arm 145
A long hole 146 is formed in the long hole 146.
A pin 149 implanted at the tip of the rod 148 of the air cylinder 147 is fitted into the pin 149 . Therefore, when the air cylinder 147 operates, the arm 145
The rotary shaft 142 rotates through the shaft, and the shutter 141 rotates accordingly to maintain the tilted position. For this purpose, the opening 8 of the turntable 12
The printed circuit board 10 that fell from the
1 and fall onto the receiving plate 150.

The receiving plate 150 is fixedly arranged on the base 140. An air cylinder 151 is disposed below the receiving plate 150. This cylinder 15
1 is a receiving plate 150 for the fallen printed circuit board 10.
This is for positioning in the direction A in FIG. 16 above. That is, a bar 153 is attached to the piston rod 152 of the cylinder 151, as shown in FIG. 17, and arms 154 are fixed to both ends of the bar 153. At the upper end of this arm 154 is a printed circuit board pressing plate 1.
55 is fixed horizontally. Therefore, when the air cylinder 151 operates, the printed circuit board pressing plate 155
moves on the receiving plate 150 in the direction A in FIG. 16 to bring the front end of the printed circuit board 10 into contact with the bent piece 156 of the receiving plate 150, thereby positioning the printed circuit board 10.

Furthermore, a printed circuit board pressing plate 157 is disposed on the side of this receiving plate 150 for pressing the printed circuit board 10 while regulating its position in the direction B in FIG. 16. This pressing plate 157 is connected to a chain 159 via connecting fittings 158 at both ends.
is connected to. The chain 159 is wound around a pair of sprockets 160 on the left and right sides, and a rotating shaft 161 to which one sprocket 160 is fixed is configured to be driven by a motor 162 via the chain 163. There is. Further, the printed circuit board pressing plate 157 is configured to be able to come into contact with a pair of micro switches 164 and 165, and the motor 162 is configured to be switched between forward and reverse rotation by these micro switches 164 and 165. has been done.

A belt conveyor 166 is disposed on the left side of the receiving plate 150 in FIGS. 16 and 17. The belt conveyor 166 has four round belts 16.
7 are connected endlessly and stretched between guide rows 169 attached to a pair of shafts 168, and the belt 167 is in contact with a tension adjusting roller 170 and a driving roller 171. The driving roller 171 is fixed to a driving shaft 172, and the driving shaft 172 is configured to be driven by a motor 173 via a belt 174.

An air cylinder 175 is arranged below the belt conveyor 166 as shown in FIG. This air cylinder 175 is supported on the lower surface of the base 140 via a pair of rods 176. And the piston rod 175a of this cylinder 175
A support plate 177 is fixed to the tip. A pair of sleeves 178 are fixed to this support plate 177, and these sleeves 178 are fitted to the rod 176 via slide bearings. Therefore, as the air cylinder 175 operates, the support plate 177 is guided by the pair of rods 176 and is configured to move up and down. The support plate 177 has three push-up plates 17 that protrude upward.
9 is fixed. These push-up plates 179
When the support plate 177 rises, it moves upward through the round belt 167 of the belt conveyor 166, and transfers the printed circuit board 10 transferred by the belt conveyor 166 to the belt conveyor 1.
66 into the stocker 180 from below. A bending piece 181 is integrally formed at one end of the push-up plate 179, so that the printed circuit board 10 moving on the belt conveyor 166 can be bent.
The tip of the bending piece 181 comes into contact with the bent piece 181.

The piston and rod 175a of the air cylinder 175 can be selectively operated in three operating positions. When the piston is in the lower position, the push-up plate 179 is below the upper surface of the belt conveyor 166, as shown in FIG. Pass through the bottom. That is, defective printed circuit boards 10 are automatically selected here. Further, when the piston of the air cylinder 175 is in the intermediate position, the push-up plate 179 is at the same height as the top surface of the belt conveyor 166, and the printed circuit board 10 sent by the belt conveyor 166 is folded onto the push-up plate 179. It comes into contact with the curved piece 181 and stops moving. In this state, when the air cylinder 175 operates and the rod 175a rises, the push-up plate 17
9 pushes up the printed circuit board 10 and moves the stocker 180
It is designed to lead inward.

Explanation of the structure of the stocker Next, we will explain the stocker 180 disposed above the belt conveyor 166 in particular in FIGS. 17 and 19.
This will be explained with reference to FIG. 20 and FIG. A pair of opposing parallel frames 182 of the belt conveyor 166
A pair of stocker mounting bars 183 are mounted perpendicularly to the frame 182 between them. Furthermore, four claws 184 are attached to each of the pair of bars 183. these nails 1
84 is a bar 183 as shown in FIG.
It is slidably held within a guide tube 185 that is fixed to the. This pawl 184 is pushed in the projecting direction by a compression spring 186 within the guide cylinder 185. Further, the lower surface on the tip side of the claw 184 is formed into an inclined surface 187. Therefore, when the printed circuit board 10 is pushed up by the push-up plate 179, the edge of the printed circuit board 10 pushes the inclined surface 187 of the claw 184 and gets over the claw 184.

As shown in FIG. 19, the stocker 180 placed on the stocker mounting bar 183 has a pair of side plate portions 188, 189 and links connecting these side plate portions, which intersect with each other and are connected at the center with a pin. 1
90,191. Side plate part 18
Each of 8 and 189 is constructed by combining three horizontal frames 192 and four vertical frames 193, and rails 194 having a U-shaped cross section are fixed to the vertical frames 193 at both ends. And within this rail 194 are the links 190, 191.
A block 195 attached to the end of the block 195 is slidably retained. Therefore, by moving the block 195 and changing the intersection angle of the links 190 and 191, the distance between the side plates 188 and 189 can be changed, and the printed circuit board 1 of various sizes can be changed.
The size of the stocker 180 can be changed according to the size of the stocker 180. Further, four rectangular small holes 196 are formed in the horizontal frame 192 on the lower end side, and claw plates 197 are formed in these small holes 196.
The four claws 198 are adapted to be inserted respectively. When a predetermined number of printed circuit boards 10 are stored in the stocker 180, these claws 198 are pushed in to support the lower part of the lowest printed circuit board 10, and in this state the stocker 180 is moved to another location. There is.

Explanation of the operation of the automatic electronic component insertion machine Next, the operation of the automatic electronic component insertion machine with the above configuration will be explained.

Explanation of operation of printed circuit board feeding device Printed circuit boards 10 into which electronic components are to be inserted by this machine are arranged vertically on an inclined printed circuit board receiving plate 22, as shown in FIGS. 2 and 3. has been done. Since the printed circuit boards 10 are arranged vertically on the inclined receiving plate 22 and fed one after another, the upper end of the printed circuit boards 10 is stepped, and therefore the printed circuit boards 10 described later are The printed circuit board 10 will be easily separated during scraping. Furthermore, the printed circuit board 10 is pressed against the roller 28 by a weight 27 on the trolley 26.
Since the weight of the printed circuit board 10 is supported by the support plate 22, the printed circuit board 10 is pressed against the roller 28.
The pressure is approximately constant regardless of the number of printed circuit boards 10, and deformation of the printed circuit boards is prevented. Furthermore, when the printed circuit board 10 at the forefront is scraped off, the printed circuit boards 10 on the receiving plate 22 are successively scraped off.
moves forward, but at this time printed circuit board 1
Since the lower part of 0 is stepped, the contact between the printed circuit board 10 and the receiving plate 22 is a line contact.
The printed circuit board 10 can be smoothly moved on the receiving plate 22.

Next, the operation of scraping off the frontmost printed circuit board 10 that is in contact with the roller 28 will be described.
First, the air cylinder 50 is activated, and the connecting portion 49 of the frame 47 is pushed by the rod 51 of the cylinder 50. Then, the frame 47 moves upward in FIG. 2 while being guided by the pair of rods 30, and the push bolt 52 attached to the frame 47 presses the lower end of the push rod 45. As a result, the rod 45 is guided by the sliding guide 46 and moves upward. rod 4
The roller 45a attached to the upper end of the lever 42 is fitted into the holding piece 42a which is attached to the end of the lever 42 and has a U-shaped cross section.
5, the lever 42 rotates about the support shaft 41 as shown by the chain line in FIG.
Then, the roller 43 attached to the tip of the lever 42 scrapes off the pressed portion 4 of the rod support plate 31.
Press 4. As a result, the support plate 31 moves downward while being guided by the rod 30 against the coil spring 34. Therefore, the pair of scraping rods 37 attached to this support plate 31 move downward, and first the rollers 39 of these rods 37 touch the printed circuit board 10.
rolls in contact with the front surface of the Therefore, the rod 37 does not damage the surface of the printed circuit board 10 at this time. When the rod 37 further descends, the fourth
As shown in the figure, the stepped portion 40 of the rod 37 comes into contact with the upper end of the printed circuit board 10 at the forefront. Since there is no receiving plate 22 at a position corresponding to the lower end of the frontmost printed circuit board 10, the printed circuit board 10 is pushed down by the stepped portion 40 as the rod 37 descends. Note that at this time, the roller 28 that is in contact with the printed circuit board 10 is relatively
0, the roller 28 will not damage the surface of the printed circuit board 10.

The frame 47 continues to rise until it reaches the position indicated by the chain line in FIG. 2, and in this state the frame 47 stops. At this time, as shown in FIG. 4, since the cam groove 72 of the cam 71 is biased toward the front side (to the right in FIG. 4), the arm 69 rotates counterclockwise about the axis of the rotating shaft 54. in a moved position. Therefore, the printed circuit board moving arm 55, which is connected to this arm 69 via the rotating shaft 54, is in a horizontal rotational position as shown in FIG. Therefore, the lower end of the printed circuit board 10, which has been moved downward by the scraping rod 37, is removed by the arm 55, as shown in FIG.
It will be inserted into the slit 56 of. At this time, the lower end of the printed circuit board 10 pushes the gripping portion 58 of the printed circuit board gripping cam 57 to rotate the cam 57 clockwise about the pin 59 against the coil spring 65. Since the center of curvature of the gripping portion 58 of the cam 57 is eccentric with respect to the pin 59, the printed circuit board 10 can be easily inserted.
The printed circuit board 10 held by one wall portion of the slit 56 is securely held and will not come off from the slit 56.

When the printed circuit board 10 is gripped by the printed circuit board moving arm 55, the air cylinder 50 is operated again, and the rod 51 is lowered this time.
Therefore, the frame 47 connected to this rod 51 also descends. As the frame 48 descends, the arm 55 supported by the frame 47 via the rotating shaft 54 also descends. During this descent, the roller 7 at the tip of the arm 69 of the rotating shaft 54
0 moves within the cam groove 72 of the cam 71. The shape of this cam groove 72 is shown in FIG.
5), the printed circuit board moving arm 55, which is connected to the arm 69 via the rotating shaft 54, gradually rotates clockwise as it goes downward, as shown in FIG. move. When the frame 47 is lowered to the lowest position, the printed circuit board moving arm 55 is rotated by 90 degrees and becomes vertical as shown in FIG.
Therefore, the printed circuit board 10 supported by this arm 55 is in a horizontal state. At this time, the roller 66 at the tip of the release rod 62 supported by the arm 55 comes into contact with a semicircular cam 67, and the rod 62 is pushed upward. This movement of the rod 62 is transmitted to the cam 57 via the pin 61, and the cam 57 rotates clockwise about the pin 59 against the coil spring 65. This allows the cam 57
The grip of the printed circuit board 10 is released.

Then, the air cylinder 74 is activated and the rod 75 moves forward. For this purpose, the stepped portion 77 of the pressing block 76 at the tip of the rod 75 presses the rear end of the printed circuit board 10 and moves it toward the X-Y table 13 while separating it from the slit-shaped notch 56 of the arm 55. (See Figures 3 and 5). When the printed circuit board 10 is moved, both ends of the printed circuit board 10 in the width direction are guided by the stepped portions 86 and 87 of the guide rails 82 and 83, respectively. When the rod 75 of the air cylinder 74 moves further forward, both ends of the printed circuit board 10 in the width direction are moved to the guide rails 8.
6, while being guided by the stepped portions 95 of a pair of printed circuit board guide rails 90, 91 located on the extension of the printed circuit boards 2, 83 and arranged on the turntable 13. When the tip of the printed circuit board 10 blocks light from the photosensor 199 disposed on the base of the XY table 13, the air cylinder 75 stops operating. With this, the printed circuit board 10 is connected to the turntable 12.
Stop above.

Based on the detection signal of the photo sensor 199, the air cylinder 50 of the printed circuit board supply device 11
resumes operation, the frame 47 begins to rise again, and the rod 75 of the air cylinder 74 begins to retreat.

Explanation of operation of printed circuit board mounting position detection device As the frame 47 rises, a pair of rails 8 supported by this frame 47
2,83 also rises, and as shown in Figure 8, rail 8
The pressing bolt 108 attached to the tip of the arm 107 is separated from the pressed arm 107. Then, the pressed arm 107 is pushed by the compression coil spring 200 interposed between the pressed arm 107 and the turntable 12, and the rotating shaft 100 to which this arm 107 is attached rotates as shown in FIG. Rotate counterclockwise as shown. Then this rotating shaft 10
The detection pin 102 at the tip of the arm 101 fixed to the base plate 10 is inserted into the reference hole 103 of the printed circuit board 10, thereby confirming that the printed circuit board 10 is correctly mounted on the turntable 12. That is, when the detection pin 102 is inserted into the reference hole 103 of the printed circuit board 10, the rotation axis 1
The tip of the flapper rod 105, which is rotated to the 00, closes the nozzle 106. Therefore nozzle 10
6 back pressure increases rapidly. If the printed circuit board 10 is not correctly placed on the turntable 12, the detection pin 102 will come into contact with the surface of the printed circuit board 10, and the rotation of the rotating shaft 100 will be stopped midway. For this reason, the flapper rod 105 is biased against the nozzle 106, and the back pressure of the nozzle 106 does not increase. In this device, nozzle 10
By increasing the back pressure 6, it is possible to detect the correct positioning of the printed circuit board 10 and move on to the next operation.

Since the mounting of the printed circuit board 10 is detected by the flapper rod 105 and the nozzle 106 that work together with the detection pin 102, there is a self-cleaning effect and the influence of dust generated when electronic components are inserted is eliminated. I won't receive it. Therefore, there are fewer malfunctions and the machine operates more accurately.

Explanation of operation of X-Y table and turntable When the above-mentioned detection device detects that the printed circuit board 10 is correctly mounted, the lead wire of the electronic component is inserted into the through hole of this printed circuit board 10. Electronic components are mounted. In other words, the X-Y supporting the turntable 12
The table 13 moves in the X and Y directions in FIG. 6 under NC control of the X-Y table drive. and insertion head 14 (see Figure 1)
Electronic components supplied from the electronic components are mounted at predetermined positions on the printed circuit board 10. Note that all the electronic components to be mounted at this time are oriented in the X direction, and the electronic components are mounted in a pair of through holes formed in the X direction.

Next, the turntable 12 is the X-Y table 13
This time, the electronic components are mounted facing in the Y direction. That is, electronic components are mounted in a pair of through holes formed in the Y direction on the printed circuit board 10. The turntable 12 is rotated by the operation of an air cylinder 125 shown in FIG. When the air cylinder 125 is actuated, the piston 127 of the cylinder 125 moves to the right in FIG. 10, and the flexible rod 126 to which the piston 125 is fixed also moves. And this Rod 126
The movement of the chain 123 is via the connecting fitting 124.
and the chain 123 moves. As a result, the sprocket 122 around which the chain 123 is wound is driven to rotate. This rotation of the sprocket 122 is shown in FIGS. 11 and 12.
As shown in the figure, the rotation is transmitted to the turntable drive gear 110 through a friction clutch formed by alternately stacking and contacting steel plates 115 and artificial leather 116, and this drive tooth 110 also rotates. Therefore, the turntable 12, which has a gear 109 meshing with the gear 110 formed on its outer circumference, also rotates.

As a result, the turntable 12, for example,
The bolts 130 and 131 on one side of the positioning block 129, which rotates clockwise in FIG.
Separate from 34. And turntable 12
When rotated 90 degrees, the bolt 130 on the other side of the positioning block 129 first comes into contact with the buffer projection 135 of the stopper 133 to absorb the impact, and immediately after that, the bolt 131 comes into contact with the stop projection 134 of the stopper 133. The rotational position of the turntable 12 is then determined. Since the rotation is stopped after being buffered in this way, the turntable 12 will not rotate in the opposite direction due to the repulsive force when it comes into contact with the stop projection 134.

Furthermore, the piston 127 of the air cylinder 125 is configured to move with a stroke slightly larger than the stroke required to rotate the turntable 12 by 90 degrees, and the extra stroke is used to move the steel plate 115 and the artificial leather 116. It is designed to be absorbed by the slip of the friction clutch, which is made up of overlapping layers. Therefore, even when two turntables 12 are rotated by the driving force of one air cylinder 125, there is no need to synchronize the two turntables, and the structure is simplified. The table 12 will be correctly positioned.

Then, in a state rotated by 90 degrees, electronic components are further mounted on the printed circuit board 10 as described above.

Explanation of the operation of the printed circuit board pick-up device When the mounting of the predetermined electronic components is completed, this printed circuit board 10 is placed on the turntable 12.
It is designed to fall downward from a circular opening 89 formed in the. That is, the frame 47 of the printed circuit board supply device is once raised, moves the next printed circuit board 10 downward, and waits for the next printed circuit board 10. Then, an air cylinder 84 attached to the lower part of a pair of guide rails 82 and 83 attached to this frame 47 is operated to move the rod 84.
When the rod 84a protrudes, the rod 84a is attached to the printed circuit board guide rails 90, 91 as shown in FIG.
Blocks 90a, 91a fixed to the ends of
Press. Pin 9 supporting rails 90, 91
Since the elongated hole 94 into which the block 9 is fitted is inclined with respect to the length direction of the trays 90 and 91, the block 9
When 0a, 91a are pushed, the rails 90, 91 move to the right in FIG. 13 against the coil springs 90b, 91b, and both rails 90, 91
These rails 90, 91
The printed circuit board 10, which was supported at both ends by the first
As shown in FIG. 4, it is released from the support of the rails 90, 91 and falls naturally downward through the opening 89 of the turntable 12.

Since the printed circuit board 10 in which the components have been inserted is released from the support of the rails 90 and 91 and allowed to naturally fall downward through the opening 89 of the turntable 12, the turntable 1
This eliminates the need for a means for taking out the printed circuit board 10 from the printed circuit board 2, such as a robot arm, which is advantageous in terms of space. Further, the time required for ejecting the printed circuit board 10 is greatly reduced.

When the printed circuit board 10 falls, the shooter 141 located at the bottom of the X-Y table 13
is inclined, and it will slide on this shoe 141 and fall onto the printed circuit board 10. That is, immediately before the air cylinder 84 for releasing the support of the printed circuit board 10 from the rails 90, 91 is activated, the air cylinder 147 shown in FIG. 15 is activated. The rod 148 of this air cylinder 147 is connected to the pressed arm 145 via a pin 149, so that the pressed arm 145 rotates counterclockwise about the rotating shaft 142 in FIG. Then, the rotating shaft 142 to which this arm 145 is fixed rotates. Therefore, this rotation axis 1
The shutter 141 fixed to 42 is tilted as shown by the two-dot chain line in FIG. Then, the printed circuit board 10 will fall onto the shooter 141 that is tilted in this manner.

Printed circuit board 10 that fell onto the computer 141
slides on this shooter 141 and falls onto the receiving plate 150. Here, the printed circuit board 10 is correctly positioned and supplied to the belt conveyor 166. That is, the printed circuit board 1 is placed on the receiving plate 150.
When the micro switch 201 detects that 0 has fallen, the air cylinder 151 disposed at the bottom of the receiving plate 150 is activated first. Since the rod 152 of this cylinder 151 is connected to the printed circuit board pressing plate 155 via a bar 153 and an arm 154 (see FIG. 18), the operation of the air cylinder 151 causes the printed circuit board pressing plate 155 to be pressed against the receiving plate. 150 on the left in Figure 15,
That is, moving in the direction of arrow A in FIG. 16,
This pressing plate 155 presses the rear end of the printed circuit board 10. As a result, the front end of the printed circuit board 10 comes into contact with the bend 156 of the receiving plate 150, and in this state, the air cylinder 151 temporarily stops operating, and then the rod 152 is moved in the opposite direction, and the pressing plate 155 away from the rear end of the substrate 10.

Then, the motor 162 starts rotating, and the rotation of the motor 162 is transmitted to the rotating shaft 161 via the chain 163. For this purpose, the rotating shaft 1
61 starts to rotate, and the chain 159 wound around the sprocket 160 fixed to the rotating shaft 161 moves. Therefore, the printed circuit board pressing plate 157 connected to the chain 159 via the connecting fitting 158 moves to the left in FIG. 17, that is, in the direction of arrow B in FIG. 16. By this movement of the pressing plate 157, the printed circuit board 10 is pushed to the left in FIGS. 16 and 17, and is placed on the rotating belt conveyor 166.

Then, the printed circuit board 10 is transferred to a belt conveyor 16.
6, the upper end of the press plate 157 comes into contact with the micro switch 165. Then motor 1
62 is reversed, and as a result, the pressing plate 1
57 moves to the right in FIG. When the pressing plate 157 comes into contact with the micro switch 164, the rotation of the motor 162 is stopped, and the pressing plate 157 is thereby stopped in preparation for pressing the next printed circuit board 10.
7 is waiting.

In this way, the printed circuit board 10 is first regulated in position on the receiving plate 150 in the direction A in FIG. The printed circuit board 10 is supplied to the belt conveyor 166 in the correct orientation. Furthermore, even if the size of the printed circuit board 10 changes, there is no need to adjust the machine each time, making the operation extremely simple.

By the action of the pressing plate 157, the belt conveyor 1
The printed circuit board 10 transferred onto the belt conveyor 166 is conveyed by a round belt 167 constituting the belt conveyor 166 and reaches the lower part of the stocker 180.
A belt conveyor 166 is installed at the bottom of the stock 180.
A push-up plate 179 faces and waits at the same height as the top surface, and since a bent piece 181 is integrally provided at the end of this push-up plate 179, this The front end of the printed circuit board 10 comes into contact with the bent piece 181, and the printed circuit board 10 stops moving at this position. Note that since the belt conveyor 166 continues to rotate, the printed circuit board 10 is relatively slipping on the belt conveyor 166 at this time.

When the printed circuit board 10 moves to the lower part of the stocker 180 and stops, the cylinder 175 is activated and the rod 175a moves upward. Then, the support plate 17 attached to this rod 175a
7 is guided by a pair of rods 176 and moves upward. Then, the push-up plate 179 supported by the support plate 177 moves upward through the round belt 167 and guides the printed circuit board 10 on the belt conveyor 166 into the stocker 180.

Explanation of operation of the stocker At this time, as shown in FIG.
4 into the guide cylinder 185 against the spring 186 and get over this pawl 184. Therefore, even if the push-up plate 179 is subsequently moved downward by the cylinder 175, both ends of the printed circuit board 10 will be locked by the claws 184 on both sides, and it will not fall from the stocker 180. There isn't.
In this way, the printed circuit boards 10 are sequentially pushed into the stocker 180 from below and are stacked in the stocker 180.

When a predetermined number of printed circuit boards 10 are stored in the stocker 180, the stocker 180 is moved to the conveyor 1.
66. This stocker 180 is removed as follows. First, the air cylinder 175 is actuated based on a manual operation command to move the push-up plate 179 upward. As a result, the printed circuit board 10 in the stocker 180 is removed from the stocker 1.
Lift upwards to 80. Next, the nail plate 197
is pushed to cause the claws 198 of the claws 197 to protrude inside the stocker 180 through the rectangular small holes 196 formed in the lower horizontal frame 192. Then, the claws 198 lock both widthwise ends of the lower surface of the printed circuit board 10 stored at the bottom, and even if the stocker 180 is lifted, the printed circuit board 10 will not fall from the stocker 180. Four locking blocks 202 are fixed to the lower part of the stocker 180, and these blocks 20
2, the stocker 180 is attached to the stocker mounting bar 1.
83, it can be easily removed.

In this way, the stocker 180 is not only used to store the printed circuit boards 10 with components inserted, but also to
It can also be used as a container for moving a predetermined number of printed circuit boards 10 to another location, which is very convenient. Also this Stotsuka 180
It can also be used as a printed circuit board storage case for the next process, for example, an automatic solder dip machine. Furthermore, this stocker 180 has a pair of side plate parts 1.
88 and 189 are connected by intersecting links 190 and 191, these side plate parts 1
The distance between 88 and 189 can be freely changed, thereby allowing printed circuit boards 1 of various sizes to be
It becomes possible to store 0. Also, if you are not using this stocker 180, link 19
A pair of side plates 18 that can be folded by rotating 0,191.
If 8,189 are brought into contact with each other, no space is required and it is very convenient.

Additional explanation of the printed circuit board take-out device Furthermore, in this electronic component automatic insertion machine, the printed circuit board 10 with a mounting defect is removed from the stocker 180.
It is designed to be able to be discharged separately without having to be stored inside. That is, when a defective product detection device (not shown) detects a poorly mounted printed circuit board 10, or when a signal based on an operator's command is issued, the air cylinder 1 shown in FIG.
75 is activated to move the rod 175a to the lower position. For this reason, the push-up plate 179 also moves downward, and the bent piece 181 of this push-up plate 179 no longer comes into contact with the printed circuit board 10. For this purpose, the printed circuit board 10 is moved by the conveyor 166 and passes under the stocker 180, and the printed circuit board 10 is moved by the conveyor 166 and passes under the stocker 180.
It falls from this belt conveyor 166 at the left end of 66 and is discharged.

In this way, the printed circuit board 10 is stored in the stocker 180.
Since the air cylinder 175 for pushing inside is configured with a three-position type,
By selectively operating the air cylinder 175, defective products can be automatically distinguished and discharged based on the detection of whether the printed circuit board 10 is good or bad.

Effects of the Invention As described above, the present invention consists of a detection pin that can be inserted into a detection hole formed in a printed circuit board, a flapper that interlocks with the detection pin, and a nozzle that is placed opposite the flapper. It detects whether the detection pin is inserted into the detection hole by the change in back pressure of the nozzle accompanied by the change in the position of the flapper with respect to the nozzle, and thereby the printed circuit board is mounted at the predetermined mounting position. It is designed to detect whether or not it is being performed.

Therefore, according to the present invention, even if dust adheres between the nozzle and the flapper that constitute the detection section, it is immediately blown away, thereby preventing malfunctions due to dust.
In other words, the detection section has a self-cleaning function.

Furthermore, according to the present invention, since the nozzle and flapper are not in contact with each other, they will not be worn out or damaged, making it possible to provide a long-life and highly reliable detection device. becomes.

Further, according to the present invention, the accuracy can be easily changed by changing the interlocking structure between the detection pin and the flapper, for example by changing the length of the flapper rod in the above embodiment.

[Brief explanation of the drawing]

The drawings show an embodiment of an automatic electronic component insertion machine to which the present invention is applied, in which Figure 1 is a schematic plan view of the automatic electronic component insertion machine, Figure 2 is a front view of a printed circuit board supply device, Figure 3 is the same side view, Figure 4 is an enlarged side view of the main part of the printed circuit board supply device showing the operation of scraping off the printed circuit board, and Figure 5 is the side view of the printed circuit board supply device showing the movement of the scraped off printed circuit board. Another enlarged side view of the main parts, FIG. 6 is a plan view of the X-Y table and turntable, FIG. 7 is a cross-sectional view taken along the - line in FIG. 6, and FIG. 8 is a position detection device on the turntable of a printed circuit board. , FIG. 9 is a sectional view taken along the - line in FIG. 7, FIG. 10 is a plan view of the rotational drive device of the turntable, FIG. FIG. 13 is a plan view of the turntable showing the operation of dropping a printed circuit board from the turntable, FIG. 14 is a cross-sectional view along the line ~ in FIG. 13, and FIG. 15 is an exploded perspective view of the friction clutch of the turntable drive device. A front view of the X-Y table showing the operation of sliding a naturally fallen printed circuit board by the shooter, FIG. 16 is a plan view of the printed circuit board discharge device, and FIG. 17 is a side view of the same.
FIG. 18 is a perspective view of the same essential parts, FIG. 19 is a perspective view of the stocker, and FIG. 20 is a side view of the printed circuit board discharge device showing the operation of pushing up and storing the printed circuit board into the stocker. In the symbols used in the drawings, 10...Printed circuit board, 100...Rotating shaft, 101...Arm, 102...Detection pin, 103...Reference hole (detected hole), 105...Flatspar rod, 106...
...Air nozzle.

Claims (1)

[Scope of utility model registration request] In an electronic component automatic insertion machine that mounts a printed circuit board from a printed circuit board supply device to a predetermined position of a component insertion device and automatically mounts an electronic component on the printed circuit board, a detection target formed on the printed circuit board is provided. It consists of a detection pin that can be inserted into the hole, a flapper that interlocks with the detection pin, and a nozzle that is arranged opposite to the flapper. An electronic component automatic insertion machine that detects a change in the back pressure of the nozzle due to a change in the position of a flapper, and thereby detects whether or not the printed circuit board is mounted at a predetermined mounting position. A printed circuit board mounting position detection device.